Academic literature on the topic 'Vine canopy'
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Journal articles on the topic "Vine canopy"
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McLaurin, Wayne J., and Stanley J. Kays. "SWEETPOTATO CANOPY GEOMETRY." HortScience 28, no. 5 (1993): 458a—458. http://dx.doi.org/10.21273/hortsci.28.5.458a.
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The sweetpotato, unlike most vegetable crops, exhibits a vining growth habit where vertical development is sacrificed for rapid radial expansion. Considerable genetic diversity is present in vine length within the sweetpotato genepool. To test the relationship between the degree of vining (land area covered during the growing season) and yield, 5 vine length types (dwarf, bunch, normal, long and very long) were grafted on the same root stock (`Jewel'). At harvest, canopy diameter and area, root fwt and number, total vine length, and number of vines, leaves, missing leaves, nodes and flowers were determined as well as root, vine, leaf, petiole and flower dwt. Individual parameters were related to storage root development and harvest index. Total vine length ranged from 5.0m to 73.8m/plant, while vine number varied from 12.6 to 117.8 vines/plant. The total number of leaves/plant varied from 595 to 2680 while the percent leaf loss ranged from 17 to 38%. Root yield (fwt) was lowest for the dwarf vine type (593 g/plant) alnd highest for the longest vine type (2716 g/plant).
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McEachern, George Ray. "Four Grape Canopy Systems in Texas." HortScience 33, no. 4 (1998): 600e—600. http://dx.doi.org/10.21273/hortsci.33.4.600e.
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I. Chennin Blanc 107-cm bilateral cordon spaced 3.6 × 2.4 m, 1119 vines/ha, 14 spurs with 32 buds/vine. Yields were 8.8 t·ha-1 in the third leaf; 9.7 in the fourth, and 12.8 the 5th year, 1990, at the Jane Terrell Vineyard, Navasota, Tex. II. Cabernet Sauvignon with a two-trunk 122 cm bilateral cordon spaced 3.3 × 1.2 m, 2445 vines/ha with 48 buds/vine. Yields were 9.7 t·ha-1 for 1994 through 1997 at the mechanically harvested Newson Vineyard, Plains, Tex. III. Le Noir with a 91-cm trunk and a two-cane canopy; spaced 3 × 2.1 m, 1536 vines/ha, with 14 buds/vine. Yields were 13.3 t·ha-1 in 1996 and 11.2 in 1997 at Messina Hoff Vineyard, Bryan, Tex. IV. Merlot/110R with a 45° slanting cordon, 30 cm at south to 152 cm at north, spaced 1.5 × 1.5 m, 4308 vines/ha with 10 spurs and 20 buds/vine. Yield of 10.8 t·ha-1 in the third leaf, 1997, at Wolf Vineyard, Valley View, Tex. Four very different canopy systems were successful; the ideal system is yet to be determined.
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Fidelibus*, Matthew, Steven Vasquez, and Donald Katayama. "Canopy Separation and Defoliation for Dry-on-the-vine (DOV) Raisins on Traditional Trellises." HortScience 39, no. 4 (2004): 880B—880. http://dx.doi.org/10.21273/hortsci.39.4.880b.
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Pruning efficiency, fruitfulness, and yield and quality of raisins of `Thompson Seedless' (Vitis vinifera L.) grapevines subjected to several canopy separation and defoliation treatments for DOV raisin production were evaluated. Canopy separation treatments, tested in vineyards at Easton, and at the Kearney Agricultural Center (KAC), Parlier, Calif., were as follows; horizontal canopy separation with vine sections of fruiting or renewal zones (Peacock), horizontal canopy separation with vine sections of fruiting zones of one vine adjacent to renewal shoots of the next vine (wave), or non-separated (control). Defoliation treatments included burning or blowing leaves (Easton), application of concentrated solutions of calcium ammonium nitrate or Etherel to leaves (KAC), or no defoliation (both vineyards). Canopy separation treatments did not affect berry size, soluble solids, or raisin yield. Vines subjected to Peacock training had more cluster layers than vines subjected to wave training, at Easton, and more cluster layers than vines subjected to control training at KAC. Canopy separation reduced harvest pruning time by 20% at Easton, but not at KAC. No treatments affected raisin moisture at Easton but, at KAC, raisins of vines trained in the Peacock style had 10% higher moisture contents at harvest than raisins of wave or control vines. Vines subjected to conventional training and leaf blowing had about 40% higher “B and better” raisin grades than vines with separated canopies that were not defoliated, and about 30% higher grades than vines with conventional training and leaf burning. However, raisins of vines subjected to blowing had about 60% more mold than raisins of non-defoliated vines. Defoliation treatments at KAC did not affect any variables measured.
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Petrie, Paul R., Michael C. T. Trought, G. Stanley Howell, and Graeme D. Buchan. "The effect of leaf removal and canopy height on whole-vine gas exchange and fruit development of Vitis vinifera L. Sauvignon Blanc." Functional Plant Biology 30, no. 6 (2003): 711. http://dx.doi.org/10.1071/fp02188.
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Canopy topping and leaf removal are management practices commonly used in New Zealand vineyards to increase light and pesticide penetration to the fruit zone, thus, reducing disease incidence. Previous research has suggested that an increase in photosynthesis occurs when leaves are removed, and this may compensate for the reduced leaf area. However, it is difficult to extrapolate single-leaf photosynthesis measurements to a whole-plant scale. Therefore the extent of the compensation is unknown. To evaluate the impact of leaf removal and canopy height on whole-vine photosynthesis, treatments were imposed during the lag phase of berry growth. Leaves were removed from the lower quarter of the canopy, or vines were topped to three quarters of the height of control plants, in a two-by-two-factorial design. Both topping and leaf removal caused a decrease in whole-vine photosynthesis immediately after the treatments were imposed. Leaf removal, but not topping height, reduced photosynthesis on a per unit leaf area basis. This suggests that the lower portion of the canopy contributes more than the upper portion of the canopy to whole-vine photosynthesis. When measurements were made again approximately two months later, tall vines without leaf removal had a higher photosynthesis rate than the other treatments. Fruit yield, sugar content, vine carbohydrate reserves and pruning weights followed trends similar to those observed for photosynthesis, suggesting that although some photosynthetic compensation occurred, the defoliation treatments had a negative effect on vine growth.
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Ruland, K., Thayne Montague, and Pierre Helwi. "Impact of hail-netting on Vitis vinifera L. canopy microclimate, leaf gas exchange, fruit quality, and yield in a semi-arid environment." Viticulture Data Journal 555 (August 29, 2023): e108805. https://doi.org/10.3897/vdj.555.e108805.
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Hail events have the potential to destroy grapevine shoots, reduce yield, and inflict economic loss upon growers. As a result, many grape growers have adopted the use of hail-netting to mitigate potential vine damage. Although hail-netting has been observed to prevent hail damage, Texas High Plains grape growers have expressed concerns regarding effects hail-netting may have on vine canopy microclimate, grapevine health, fruit maturity, fruit quality and yield. Therefore, over three growing seasons (2018 – 2020), field-grown vines (<i>Vitis vinifera</i> L. 'Malbec' and 'Pinot gris') were exposed to hail-netting, or grown without hail-netting. Each growing season canopy microclimate, leaf gas exchange, fruit maturity, yield parameters, and vegetative growth were monitored. Netting reduced canopy air and leaf temperature and decreased canopy vapour pressure deficit. By modifying light infiltration and leaf temperature, hail-netting altered leaf gas exchange. In addition, gas exchange differences were found between cultivars. Although fruit pH and total acidity were not different at harvest, fruit maturity measurements revealed total soluble solid development was influenced by netting and cultivar. Vine cluster numbers were greater for vines without netting and yield parameters were generally lower for 'Malbec' vines. Pruning weights indicate decreased vegetative growth for hail-netting and 'Pinot gris' vines. Results suggest grape-growers' use of hail-netting may allow growers to achieve fruit production goals. However, when using hail-netting, growers should consider possible management modifications due to changes in vine physiology, fruit maturation, and harvest schedules.
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Sommer, KJ, PR Clingeleffer, and Y. Shulman. "Comparative study of vine morphology, growth, and canopy development in cane-pruned and minimal-pruned Sultana." Australian Journal of Experimental Agriculture 35, no. 2 (1995): 265. http://dx.doi.org/10.1071/ea9950265.
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The seasonal development of vine canopy size and vine morphology of minimal- and cane-pruned Sultana was examined by destructive harvests during the 1982-83 growth period. Leaf canopies of minimal-pruned vines developed more quickly, grew larger, and filled sooner than those of cane-pruned vines. Minimal-pruned vines had 4 times the number of shoots and 3 times the number of nodes on current seasons's shoots at 34 days after budburst. This largely explains the more rapid canopy development and fill of minimal-pruned vines. Minimal pruning had a stunting effect on growth, resulting in shorter shoots, shorter internodes, and smaller leaves compared with cane pruning. Indirect optical measurements of the seasonal leaf canopy development of Sultana vines in the same experimental vineyard during the 1991-92 growth period confirmed the results obtained in 1982-83.
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López-Granados, Francisca, Jorge Torres-Sánchez, Francisco M. Jiménez-Brenes, et al. "Monitoring Vineyard Canopy Management Operations Using UAV-Acquired Photogrammetric Point Clouds." Remote Sensing 12, no. 14 (2020): 2331. http://dx.doi.org/10.3390/rs12142331.
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Canopy management operations, such as shoot thinning, leaf removal, and shoot trimming, are among the most relevant agricultural practices in viticulture. However, the supervision of these tasks demands a visual inspection of the whole vineyard, which is time-consuming and laborious. The application of photogrammetric techniques to images acquired with an Unmanned Aerial Vehicle (UAV) has proved to be an efficient way to measure woody crops canopy. Consequently, the objective of this work was to determine whether the use of UAV photogrammetry allows the detection of canopy management operations. A UAV equipped with an RGB digital camera was used to acquire images with high overlap over different canopy management experiments in four vineyards with the aim of characterizing vine dimensions before and after shoot thinning, leaf removal, and shoot trimming operations. The images were processed to generate photogrammetric point clouds of every vine that were analyzed using a fully automated object-based image analysis algorithm. Two approaches were tested in the analysis of the UAV derived data: (1) to determine whether the comparison of the vine dimensions before and after the treatments allowed the detection of the canopy management operations; and (2) to study the vine dimensions after the operations and assess the possibility of detecting these operations using only the data from the flight after them. The first approach successfully detected the canopy management. Regarding the second approach, significant differences in the vine dimensions after the treatments were detected in all the experiments, and the vines under the shoot trimming treatment could be easily and accurately detected based on a fixed threshold.
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Ogden, Aynslie E., and Margaret G. Schmidt. "Litterfall and soil characteristics in canopy gaps occupied by vine maple in a coastal western hemlock forest." Canadian Journal of Soil Science 77, no. 4 (1997): 703–11. http://dx.doi.org/10.4141/s97-034.
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In some low-elevation coastal British Columbia forests, canopy gaps can be occupied by the hardwood tree species, vine maple (Acer circinatum). The objective of this study was to determine how vine maple gaps influence litterfall, litter decomposition, and forest floor and mineral soil properties. Measurements were made on six vine maple gaps paired with six conifer canopy plots. Vine maple gaps had significantly less conifer litterfall during the autumn, higher pH, and higher concentrations of Ca, Mg and K in the forest floor, thinner forest floors, and a weak tendency for lower C/N ratios, higher pH values and higher total N concentrations in the surface mineral soil. Vine maple litter was found to decompose significantly faster than conifer litter and to have higher concentrations of N, P, Ca, Mg, K, Fe and Zn. Decomposition rates of vine maple litter and of conifer litter did not differ significantly between vine maple gap and conifer canopy plots. Larger vine maple clones had significantly thicker forest floors with higher concentrations of Ca, and higher N concentrations and lower C/N ratios in the surface mineral soil than gaps with smaller vine maple clones. The results indicate that vine maple gaps may improve the nutritional status of the sites that they occupy within conifer forests. Key words: Litterfall, litter decomposition, soil-plant interactions, vine maple, canopy openings, canopy gaps
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Greer, Dennis H., Alla N. Seleznyova, and Steven R. Green. "From controlled environments to field simulations: leaf area dynamics and photosynthesis of kiwifruit vines (Actinidia deliciosa)." Functional Plant Biology 31, no. 2 (2004): 169. http://dx.doi.org/10.1071/fp03151.
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Canopy leaf area development and daily rates of carbon acquisition of kiwifruit [Actinidia deliciosa (A.�Chev.) C.F. Liang et A.R. Ferguson] vines growing in orchard conditions were modelled from mathematically-based physiological descriptions of leaf area expansion and photosynthesis of individual leaves Model drivers were temperatures and photon flux densities (PFD) measured in the orchard at 30-min intervals over the growing season. A modelling framework of shoot leaf area expansion, developed from controlled environment studies, was extended to whole vines by including canopy architectural components, such as shoot numbers, percentage budbreak and proportions of shoots in different length classes. Daily photosynthesis was modelled from rectangular hyperbolic functions determined for both sun and shade leaves and simulated from calculated light interception. Canopy leaf area, photosynthesis and PFDs within the canopy, obtained from measurements from vines grown in the orchard, were used to test the model. Close agreement occurred between the simulated and measured canopy leaf area development, and also between simulated and measured rates of photosynthesis. Total carbon acquisition over the growing season, estimated at 11 kg vine–1, compared closely with measured increments in vine biomass over the growing season. Results thus confirm the physiologically based model to be readily scalable to whole vines growing in orchard conditions.
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Gowdy, Mark, Bruno Suter, Philippe Pieri, et al. "Variety-specific response of bulk stomatal conductance of grapevine canopies to changes in net radiation, atmospheric demand, and drought stress." OENO One 56, no. 2 (2022): 205–22. http://dx.doi.org/10.20870/oeno-one.2022.56.2.5435.
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In wine growing regions around the world, climate change has the potential to affect vine transpiration and overall vineyard water use due to related changes in daily atmospheric conditions and soil water deficits. Grapevines control their transpiration in response to such changes by regulating conductance of water through the soil-plant-atmosphere continuum. The response of bulk stomatal conductance, the vine canopy equivalent of stomatal conductance, to such changes were studied on Cabernet-Sauvignon, Merlot, Tempranillo, Ugni blanc, and Semillon vines in a non-irrigated vineyard in Bordeaux France. Whole-vine sap flow, temperature and humidity in the vine canopy, and net radiation absorbed by the vine canopy were measured on 15-minute intervals from early July through mid-September 2020, together with periodic measurements of leaf area, canopy porosity, and predawn leaf water potential. From these data, bulk stomatal conductance was calculated on 15-minute intervals, and multiple linear regression analysis was performed to identify key variables and their relative effect on conductance. For the regression analysis, attention was focused on addressing non-linearity and collinearity in the explanatory variables and developing a model that was readily interpretable.Variability of vapour pressure deficit in the vine canopy over the day and predawn water potential over the season explained much of the variability in bulk stomatal conductance overall, with relative differences between varieties appearing to be driven in large part by differences in conductance response to predawn water potential between the varieties. Transpiration simulations based on the regression equations found similar differences between varieties in terms of daily and seasonal transpiration. These simulations also compared well with those from an accepted vineyard water balance model, although there appeared to be differences between the two approaches in the rate at which conductance, and hence transpiration is reduced as a function of decreasing soil water content (i.e., increasing water deficit stress). By better characterizing the response of bulk stomatal conductance, the dynamics of vine transpiration can be better parameterized in vineyard water use modeling of current and future climate scenarios.
Dissertations / Theses on the topic "Vine canopy"
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Ray, Alexandra. "Defining Sustainable Vine Balance for Cabernet Franc in Southern Illinois." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/838.
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In 2009 and 2010 a split, split, split plot experiment with training system, VSP or Smart-Dyson Ballerina (main plot), N, 0 or 33.6 kg/ha (split), crop level, 14.0, 18.7, or 23.4 clusters/m/canopy (split), clone, Cabernet Franc 1,4, 8 and 214 treatments with five replications were established in Union County, Illinois on mature vines. The Smart-Dyson Ballerina training system produced a Ravaz index that was 89% and 28% bigger compared to the VSP respectively in 2009 and 2010. In 2009, the Smart-Dyson Ballerina produced a 80% bigger yield than VSP and in 2010 yield was also larger, but influenced by both training system and crop level. Maintaining a balanced vineyard can increase profit for the grower by up to $6,356.87/ha.
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Sutherland, M. J. "The influence of vine vigour and canopy ideotype on fruit composition and aroma of Sauvignon Blanc." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1270.
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The influence of soil texture on canopy growth, vine yield, and fruit composition of Sauvignon blanc were assessed on a mature vineyard from the Rapaura area in Marlborough. The subject vines were mature Sauvignon blanc in a commercial vineyard trained to four cane VSP and planted with a north south orientation. Row and vine spacings were typical of the area at 3m x 1.8m. Four areas of different soil texture were identified using trunk circumference measurements, visual assessment of the surface soil and aerial photographs to identify changes in vine growth. Soil pits were excavated at a later date to determine root numbers and record the soil texture in the different areas. Two crop treatments were imposed on half of the plots at approximately 50% veraison: unthinned crop and 50% crop. A shading treatment was also imposed at 50% veraison where three sets of tagged shoots had bunches that were exposed to sunlight, bunches that had some natural shading from leaves or bunches that had paper bags fastened over each to provide a completely shaded environment. Vine vegetative vigour for each plot was assessed during the growing season using the Point Quadrat method and at pruning using bud counts and pruning weights. Thirty berry samples were collected from the 32 plots and analysed weekly for soluble solids and berry weight. Harvest of bunches from the tagged shoots occurred on two different dates with the first harvest picked when fruit from one soil and crop treatment had reached 21 °Brix. The second picking took place just before the commercial harvest, which coincided with last soil and crop treatment reaching 21 °Brix. Bunches from each tagged shoot were weighed, frozen and later analysed for soluble solids, pH, organic acids, and methoxypyrazines. Vines on very stony textured soils had small trunk circumferences with a high root density and yield to pruning weight ratio compared to those growing on deep silt soils. Vines on deep silt soils had more vigorous canopies with large shoots and a higher leaf layer number. The target soluble solids was reached first by the vines on the very stony plots despite the higher crop load with soil texture appearing to be a dominant factor by influencing the time of flowering. Cluster shading decreased soluble solids, consistent with other studies, whilst crop thinning resulted in an earlier harvest. This was contrary to popular opinion that crop thinning at veraison would have no impact on sugar accumulation. pH and organic acids were unaffected by shading or bunch thinning. Vines growing on deep silt soils had a significantly higher level of total acidity and malic acid than those on the stony soils. At harvest, methoxypyrazine levels were very low compared to previously reported figures for Marlborough, which may have been a result of sample preparation. IBMP was significantly higher on deep silt soils, however, with no impact from the shading or crop treatment. The findings are consistent with the hypothesis that IBMP synthesis may be increased by the number of leaves surrounding bunches (Roujou de Boubee, 2003). The results suggest that soil texture plays a dominant role in influencing Sauvignon blanc flavour and aroma and due consideration should be given to vineyard layout and site selection prior to new plantings taking place.
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Okeyo, James Ajuoga. "Effects of topping, stem density, and stage of vine cutting on canopy growth and tuber yield yield of potato (Solanum tuberosum L.)." Diss., Virginia Tech, 1995. http://hdl.handle.net/10919/39156.
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Tessarin, Paola <1985>. "Effects and Modes od Action of Canopy Management Practices on Vine Physiology and Berry Composition in Organically-Cultivated cv. Sangiovese (Vitis Vinifera L.)." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7417/1/Tessarin__PhD_Thesis_Tessarin_31_03_2016_PT_Ore_14.00_ATMS.pdf.
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In organic and biodynamic vineyards, canopy management practices should be carefully and timely modulated, particularly in a context of climate change, for successfully achieving balanced plants, ventilated and exposed berries, elevated grape and wine quality. In 2013 and 2014, characterized by contrasting climatic conditions, the implications of post-veraison (late) or pea-size trimming, post-veraison or pre-harvest late defoliations and shoot-positioning (post-veraison) were assessed against long-shoots non treated controls, under field conditions on organically-cultivated cv. Sangiovese. The key agronomic and enological relevance of late trimming and defoliations clearly emerged in both seasons. Berry skin phenolics (e.g. anthocyanins, flavonols) increased markedly, without changes in technological parameters. In case of early trimming, such positive effects were observed only in 2013. Maintaining long shoots for shading decreased anthocyanins, flavonols and total phenolics concentrations and promoted the production of compact bunches. Experimental data strongly designated late trimming, a practice proved to contain yield and bunch compactness, as a valuable alternative to cluster thinning. Late trimming, defoliations and shoot positioning reduced the severity of Botrytis cluster rot. The highest levels of berry skins phenolic compounds in late trimmed and defoliated plants could have contributed control the severity of this pathogen. The enological benefits induced by late trimming and defoliations and shoot positioning emerged in both young and aged wines. For the first time, cell cultures from cv. Sangiovese berry tissues were obtained and enabled to investigate, in controlled conditions, the relations between mechanisms regulating secondary metabolism in grapevine cells and changes induced by environmental and agronomic factors. The Doctoral Dissertation strongly highlights the need to consider, for a proper interpretation of the multiple modifications induced by canopy management strategies, physiological mechanisms other than the canonic source-sink relationships, in particular their impact on the vine hormonal status.
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Tessarin, Paola <1985>. "Effects and Modes od Action of Canopy Management Practices on Vine Physiology and Berry Composition in Organically-Cultivated cv. Sangiovese (Vitis Vinifera L.)." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7417/.
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In organic and biodynamic vineyards, canopy management practices should be carefully and timely modulated, particularly in a context of climate change, for successfully achieving balanced plants, ventilated and exposed berries, elevated grape and wine quality. In 2013 and 2014, characterized by contrasting climatic conditions, the implications of post-veraison (late) or pea-size trimming, post-veraison or pre-harvest late defoliations and shoot-positioning (post-veraison) were assessed against long-shoots non treated controls, under field conditions on organically-cultivated cv. Sangiovese. The key agronomic and enological relevance of late trimming and defoliations clearly emerged in both seasons. Berry skin phenolics (e.g. anthocyanins, flavonols) increased markedly, without changes in technological parameters. In case of early trimming, such positive effects were observed only in 2013. Maintaining long shoots for shading decreased anthocyanins, flavonols and total phenolics concentrations and promoted the production of compact bunches. Experimental data strongly designated late trimming, a practice proved to contain yield and bunch compactness, as a valuable alternative to cluster thinning. Late trimming, defoliations and shoot positioning reduced the severity of Botrytis cluster rot. The highest levels of berry skins phenolic compounds in late trimmed and defoliated plants could have contributed control the severity of this pathogen. The enological benefits induced by late trimming and defoliations and shoot positioning emerged in both young and aged wines. For the first time, cell cultures from cv. Sangiovese berry tissues were obtained and enabled to investigate, in controlled conditions, the relations between mechanisms regulating secondary metabolism in grapevine cells and changes induced by environmental and agronomic factors. The Doctoral Dissertation strongly highlights the need to consider, for a proper interpretation of the multiple modifications induced by canopy management strategies, physiological mechanisms other than the canonic source-sink relationships, in particular their impact on the vine hormonal status.
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Thomson, C. C. "Rootstock and canopy density effects on grape berry composition : organic acid composition, potassium content and pH." Lincoln University, 2006. http://hdl.handle.net/10182/772.
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The influence of rootstock and canopy density on grape berry composition was investigated over the summer of 2003-2004 on a commercial vineyard at Waipara, North Canterbury. This experiment was designed to investigate the influence of rootstock and canopy density on the acid composition, potassium (K) content and final pH of harvested fruit (Pinot Noir AM 10/5 Lincoln Selection). The trial block consisted of eight rootstocks laid out to an 8 x 8 latin square, each plot consisting of five vines of the same rootstock. Two canopy treatments were overlaid the block (down whole rows, assigned randomly, four rows to each treatment); one treatment allowed to grow naturally, in the other treatment the canopy was thinned removing double burst shoots and laterals. The bunch numbers were adjusted in the Unthinned canopy treatment (UCT) to match the Thinned canopy treatment (TCT). Information was gathered to assess: the canopy size and density (Pinot Quadrat Leaf Layer and Percent Gaps and canopy porosity), the plant yield (and berry size, berries per cluster, cluster weight, clusters per plant), plant K levels at flowering and veraison (from petioles and leaf blades) and berry composition at harvest (soluble solids (as brix), K, titratable acidity (TA), tartaric acid concentration, malic acid concentration and pH). The trial area was non-irrigated on clay loam soils and viticultural management was to best commercial practice. It was found that although rootstock influenced the levels of K in the plant and in the juice at harvest, the level of K in the juice did not influence pH in this experiment (range of rootstock juice K: 808 ppm to 928 ppm, l.s.d. = 75 ppm). The level of tartaric acid concentration in the juice was found to be the dominant influence on the level of pH in this experiment (rootstock pH range: 3.21 to 3.39, l.s.d. = 0.05). The juice concentration of tartaric acid was influenced by both rootstock (rootstock range 4.0 to 4.7 g/L, l.s.d = 0.4) and canopy density (UCT = 4.1, TCT = 4.7, l.s.d. = 0.4), decreased shading positively increasing the level of tartaric acid. The malic acid concentration in the juice was positively influenced by increasing canopy density (UCT = 4.7 g/L, TCT = 4.1 g/L, l.s.d = 0.4) and this played a minor role in the determination of pH in this experiment; an influence of rootstock on the level of malic acid concentration was found. The malic acid concentration strongly influenced the determination of TA (UCT = 11.0 g/L, TCT = 10.2 g/L, l.s.d = 0.5); tartaric acid concentration had a minor influence on the recorded TA. Attempts to characterise the influence of rootstock on malic acid, tartaric acid and pH were inconclusive. Rootstock was found to influence the canopy variables measured in this experiment and the recorded average plant yield. Crosses of Vitis rupestris were found to exhibit the most canopy vigour and those derived from Vitis berlandieri and Vitis riparia the least. The Canopy treatment did not show an influence over yield but the rootstock was found to influence plant yield, through the numbers of berries set in a cluster and the final harvest cluster weight. The influence of rootstock on pH may be described by the influence it exerts on canopy growth and yield but this was thought unlikely. Further research is required to describe the nature of the rootstock influence on K, malic acid, tartaric acid and pH.
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Bjurström, Håkan, and Jon Svensson. "Assessment of Grapevine Vigour Using Image Processing." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1342.
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<p>This Master’s thesis studies the possibility of using image processing as a tool to facilitate vine management, in particular shoot counting and assessment of the grapevine canopy. Both are areas where manual inspection is done today. The thesis presents methods of capturing images and segmenting different parts of a vine. It also presents and evaluates different approaches on how shoot counting can be done. Within canopy assessment, the emphasis is on methods to estimate canopy density. Other possible assessment areas are also discussed, such as canopy colour and measurement of canopy gaps and fruit exposure. An example of a vine assessment system is given.</p>
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Brouard, Eloïse. "Effet de l'adaptation des pratiques culturales de la vigne en réponse au changement climatique (manipulation de la canopée, utilisation d'acide abscissique) sur le potentiel qualitatif de la baie de raisin : approches agronomique, analytique et transcriptomique : & Caractérisation fonctionnelle de VviAKR, enzyme potentiellement impliquée dans la voie de biosynthèse des méthoxypyrazines." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0408.
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Les changements climatiques mondiaux ont déjà affecté et continueront d’affecter la physiologie de la vigne, en particulier le rendement et la composition des baies à la récolte, et donc, en définitive, la qualité et la typicité des vins produits. Parmi les différentes stratégies possibles d’adaptation de la viticulture au changement climatique (modifications de l’encépagement, création de nouvelles variétés mieux adaptées aux conditions futures,...), le contrôle de la composition des baies à la récolte par le biais d’une modification des pratiques culturales et notamment par des manipulations de la canopée (rapport feuilles/fruits (Fe/Fr), manipulation de l’exposition des grappes, échardage) est certainement celle qui serait la plus rapide à mettre en œuvre.Ma thèse a pour but de rechercher le meilleur point de compromis entre diminution du taux de sucres et maintien de l’acidité, de l’accumulation des composés phénoliques et d’une complexité aromatique proche de l’actuelle, en réponse aux manipulations de canopée (rapport Fe/Fr, échardage) couplées ou non à l’application d’acide abscissique (ABA).Différents ratio Fe/Fr ont ainsi été étudiés sur le cépage d’étude Cabernet-Sauvignon en conditions semi-contrôlées en serre sur boutures fructifères puis au vignoble au sein d’une parcelle de production. L’analyse de la composition des baies en métabolites primaires et secondaires, réalisée lors de ces deux expériences, a permis de déterminer que le ratio 6 feuilles restantes par grappe était la valeur seuil en dessous de laquelle un effet sur les métabolites primaires est visible. Une diminution du taux de sucres a notamment été observée, également associée à la diminution de la concentration en anthocyanes totales qui sont particulièrement importantes dans la définition de la typicité des vins de Bordeaux. L’application d’ABA exogène sur les baies avant la véraison a permis de diminuer les effets négatifs de la modification du ratio Fe/Fr sur l’accumulation des anthocyanes et n’a pas montré d’impact sur la typicité des vins lors des dégustations des microvinifications réalisées au cours de cette étude. Ces résultats analytiques obtenus ont été couplés à des analyses transcriptomiques de type RNAseq et PCR quantitative en temps réel (Fluidigm) afin d’identifier les gènes clefs associés au voies métaboliques primaires et secondaires réagissant aux modulations du ratio Fe/Fr couplées ou non à l’ajout d’ABA. Ainsi, le couplage modulation du ratio Fe/Fr et application d’ABA exogène sur les baies serait une méthode potentiellement utilisable afin de réduire le taux de sucres et de maintenir une typicité bordelaise proche de l’actuelle.La caractérisation fonctionnelle d'un gène potentiellement associé à la voie de biosynthèse des méthoxypyrazines, impliquées dans le caractère végétal du raisin et du vin, a également été mise en œuvre. Différentes approches ont été testées et ont fourni des indices utiles, cependant les résultats obtenus sont encore en cours de confirmation<br>Global climate changes have already affected and will continue to affect the physiology of grapevine, in particular the yield and berry composition at harvest, and thus ultimately the quality and typicality of the wines produced. Among the different possible strategies of adapting viticulture to climate change (changes varieties, creation of new varieties better adapted to future conditions,...), modulating berry composition at harvest through changing cultural practices, such as manipulations of the canopy (leaf / fruit ratio, grape exposure), may be a fast and efficient option as a short-term adaptation strategy.My thesis aims to find the best point of compromise between reducing the sugar level and, maintaining the acidity, phenolic compounds, and the aromatic complexity by the canopy manipulations (leaves / fruits ratio, secondary shoot removal), coupled or not with the application of abscisic acid.Different leaf / fruit ratios were studied on the Cabernet-Sauvignon cultivar in greenhouse and in vineyard within a plot of production. The berry composition analysis of primary and secondary metabolites, performed in these two experiments, made it possibleto determine that the ratio of 6 leaves remaining per cluster was the threshold value below which an effect on the primary metabolites is visible. A decrease in the sugar content was especially observed, also associated with a decrease in the concentration of total anthocyanins which are particularly important in the definition of the typicality of Bordeaux wines. The application of exogenous abscisic acid to the berries before veraison permitted to reduce the negative effects of the modification of the leaf-to-fruit ratio on the accumulation of anthocyanins and did not affect the typicality of the wines during the tastings of the microvinifications carried out during this study. These analytical results were coupled with transcriptomic analyses of RNAseq and real-time quantitative PCR (Fluidigm) to identify key genes associated with the primary and secondary metabolic pathways reacting to modulations of leaf-to-fruit ratio coupled or not with the addition of abscisic acid.Thus, the coupling modulation of the leaf-to-fruit ratio to the application of exogenous abscisic acid on the berries would be a usable method to reduce the sugar content and maintain a typicality of Bordeaux wines close to the current one.The functional characterization of a gene potentially associated with the biosynthetic pathway of methoxypyrazines, which are involved in vegetable character of grapes and wine, was also conducted. Different approaches have been tested and provided useful clues but the conclusive results are still under further confirmation
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Nazrala, Jorge José Bautista. "Influencia de las coberturas vegetales en el microclima de la canopia de la vid y en las características de la uva y el vino." Master's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias - École Nationale Supérieure Agronomique (Montpellier, Francia), 2004. http://bdigital.uncu.edu.ar/1115.
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Sinfort, Carole. "Couplage entre recherche expérimentale et modélisation pour l'optimisation des procédés de pulvérisation agricole." Habilitation à diriger des recherches, Université Montpellier II - Sciences et Techniques du Languedoc, 2006. http://tel.archives-ouvertes.fr/tel-00105765.
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Le travail de recherche présenté concerne l'étude des pulvérisations de produits phytosanitaires. Les études réalisées au début de ma carrière (ma thèse et les travaux qui en ont découlé) concernent le développement, la validation puis le transfert d'un modèle de calcul de la répartition des dépôts au sol, pour des pulvérisateurs à rampe. Ce travail a servi de base à la définition des méthodologies mises en place par la suite.<br />L'étude de la pénétration de la pulvérisation dans la vigne a ensuite été étudié. Un modèle a été développé à l'aide d'outils commerciaux de CFD pour la représentation du flux d'air dans la végétation et le calcul de trajectoires représentatives de gouttes. Le modèle a été paramétré à partir de mesures de vitesses d'air de part et d'autre de la canopée. Le comportement des nuages de gouttes et la proportion de produit retenue par le feuillage a été développé de manière plus détaillée : le modèle s'appuie sur un coefficient d'efficacité obtenu à partir d'autres simulations. Ces simulations ont été conçues de manière à permettre une<br />validation expérimentale. Les mesures de dépôt réalisées en conditions réelles ont ensuite permis de discuter des résultats du modèle global ainsi que des limites de l'approche.<br />Enfin des contaminations atmosphériques pendant les applications ont fait l'objet d'une démarche expérimentale pour mettre en évidence les relations entre les variables météorologiques, les paramètres-machine et les émissions de pesticide. L'analyse par des systèmes d'inférence floue ont débouché sur une proposition d'outil d'expertise. Un modèle dédié a par ailleurs été développé pour simuler les quantités émises ainsi que leur dispersion atmosphérique.
Books on the topic "Vine canopy"
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Jean, Gaudemet, and Basdevant-Gaudemet Brigitte, eds. Les canons des conciles mérovingiens (VIe-VIIe siècles): Texte latin de l'édition C. de Clercq. Editions du Cerf, 1989.
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International Congress of Canon Law (7th 1990 Paris, France). La synodalité: La participation au gouvernement dans l'église : Actes du VIIe congrès international de Droit canonique, Paris, Unesco, 21-28 septembre 1990. Letouzey et Ané, 1992.
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Gates, Henry Louis. Loose canons: Notes on the culture wars. Oxford University Press, 1992.
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Jacobson, Cliff. Canoeing wild rivers: Expanded and updated version. 2nd ed. ICS Books, 1989.
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Hippolytus. La tradition apostolique de Saint Hippolyte: Essai de reconstitution. 5th ed. Aschendorffsche Verlagsbuchhandlung, 1989.
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Gregory, Dix, and Chadwick Henry 1920-, eds. The treatise on the apostolic tradition of St. Hippolytus of Rome, bishop and martyr =: [Apostolikē paradosis]. Alban Press, 1992.
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Gaudemet, Jean ;. Basdevan. Les canons des conciles mérovingiens (VIe-VIIe siècles): Texte latin de l'édition C. de Clercq. Le Cerf, 1989.
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Kemeny, P. C. Who They Were and Why They Wanted to Suppress Obscene Literature. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190844394.003.0003.
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After examining who supported the Society for the Suppression of Vice, this chapter explores why so many social leaders and prominent liberal ministers, usually recognized as leading social and cultural progressive voices in their particular fields, wholeheartedly supported the censorship activities of the Watch and Ward Society. Four key sources shaped the anti-vice reformers’ rationale for the censorship of obscene literature: liberal Protestant theology, nineteenth-century moral philosophy, the Whig-Republican view of the public role of religion in society, and their Victorian view of literature. To the anti-vice activists, licentious literature fostered an animalism that hindered the gradual Christianization of society, ruined individuals moral character, encouraged other antisocial behaviors, and contradicted the basic canons of what constituted good literature. For these reasons, the moral reformers argued, voluntary organizations and the state had a moral obligation to suppress obscene works that threatened the well-being of society.
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Gates, Henry Louis. Loose Canons: Notes on the Culture Wars. Oxford University Press, USA, 1993.
Find full textBook chapters on the topic "Vine canopy"
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Gould, Nick, and Michael J. Clearwater. "Vine Canopy and Root Physiology." In Kiwifruit. CABI, 2023. http://dx.doi.org/10.1079/9781800620933.0015.
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Rousset, Geoffrey. "Fortifications médiévales et armes à feu : adaptation à moindre coût ou construction de tours à canon ou boulevard comme à Présilly ?" In Fortification et artillerie en Europe autour de 1500 : le temps des ruptures. Éditions de l’Université de Lorraine, 2018. https://doi.org/10.4000/13ob1.
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Dans le courant du XVe s., l’amélioration de l’artillerie à poudre a rapidement nécessité l’adaptation des fortifications médiévales à ce type d’armement. Ces premiers « balbutiements » ont pris en compte les défenses préexistantes, tâchant de minimiser au maximum les frais occasionnés par ces travaux. Les ouvrages défensifs tels que tours et courtines ont dans un premier temps été percées d’ouvertures de tirs adaptées aux différents calibres des canons, mais il est cependant vite apparu que les vieilles murailles posaient des problèmes intrinsèques : une trop importante hauteur des enceintes pour une trop faible épaisseur. Afin de pallier cet inconvénient, l’arasement des murs était la solution la moins couteuse ; mais lorsque les moyens financiers pouvaient le permettre, des tours à canons ont été installées aux endroits stratégiques des enceintes ainsi que des boulevards en avant des portes. Les places jugées inadaptables (telles que commandées par un relief à portée de tir) auraient dû être « déclassées », pourtant certains châteaux présentent des ouvrages parfaitement adaptés aux armes du moment, démontrant ainsi l’aisance financière du commanditaire comme cela semble le cas pour le boulevard du château de Présilly.
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Fradenburg, L. O. Aranye. "Clinique." In Clinical Encounters in Sexuality. punctum books, 2017. https://doi.org/10.21983/p3.0167.1.15.
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Academic writing about psychoanalysis does not often engage the practice of psychoanalysis in today’s USA, or vice versa. There are many reasons for this, and one is always wishing there were more mutual interest. The canons differ; academics still read a lot of Freud and later continental theory, less often Anglo-American object relations theory, and much less often, Thomas Ogden, Robert Stoller, Muriel Dimen, Joe Natterson, or Mark Leffert. In my experience, American psychoanalysts too often abdicate their intellectual responsibilities and the social impli-cations thereof; too few of us regard ourselves as minds shap-ing and being shaped by the urgent questions of our time. In turn, academic psychoanalytic work does not, in my view, grap-ple closely enough with the reasons why particular people seek treatment, and with the ethics of responding or not responding to misery experienced as “personal,” that is, felt to be “inside.” Queer theory has, remarkably, been to-and-fro-ing all over this ground, in its agōn with psychoanalysis, powerfully critiquing it, and equally powerfully re-thinking it, finally changing policy and helping to usher in “an exciting [era] of discovery” of sexu-ality’s range and resourcefulness (Roughton 2002, 757, referring to the first decade of the twenty-first century). The chapters to which I’m responding here show that the ground shared by queer theory and psychoanalysis is still something of a battleground, but they also show that the debate is a highly creative one, born of a provocatively uneasy intimacy.
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Marsh, David. "Poggio and Alberti Revisited." In Atti. Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-6453-968-3.08.
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The careers of the Curial secretaries Poggio Bracciolini (1380-1459) and Leon Battista Alberti (1404-1472) reveal many parallels. In 1437-1438 the Este court of Ferrara, where Eugenius IV convoked a church council, provided a focal point for their friendship. It was to the Ferrarese canon Francesco Marescalchi that Poggio dedicated Book 1 of his Latin epistles (1436), and Alberti his Hundred Apologues (1437). Both men were inspired to critiques of contemporary society by the Greek satirist Lucian, and both indulged in composing brief witticisms that expose human vice: Poggio in his Facetiae (Jests) and Alberti in his Apologi (Fables) and Vita (Autobiography). From Lucian, they also learned to dramatize human foibles on the imagined stage of the theatrum mundi, or theater of the world: Poggio in his dialogues, and Alberti in both the Intercenales and Momus. Despite such literary affinities, their approach to ethical questions differed, especially concerning the validity of allegory, which Poggio rejected but Alberti embraced. As a tribute to his colleague, Alberti dedicated Book 4 of his Intercenales to Poggio; he prefaced the work with an ironic Aesopic fable that asserts the superiority of recondite scientific research over commonplace humanistic studies. Eventually, Alberti’s status as an outsider in Florence was reflected in the deterioration in his relations with Poggio. The rift was widened in 1441, when Alberti organized the Italian poetic competition called the Certame Coronario that was held in the Florence cathedral on October 22. Poggio was a member of the jury that, to Alberti’s chagrin, refused to declare a winner.
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Dalton, David R. "Flowers." In The Chemistry of Wine. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190687199.003.0020.
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Generally, grape vines produce extraneous shoots (“suckers”) on the plant in addition to those growing beyond the few desired on the cordon wanted for proper vine growth. Generally, again, suckers are less fertile than the primary shoots, they crowd the canopy of the vine, and their growth utilizes resources required for proper growth of the primary shoots. Further, the chaotic growth makes it difficult to manage the harvest. A crowded canopy (as will be discussed subsequently) is not a healthy one for grape growth. As shown in Figures 12.1 and 12.2 and noted earlier, buds (the small part of the vine that lies between the vine’s stem and the leaf stem or petiole) can start alongside the beginning of leaves at the base of the apical meristem. The buds swell and eventually produce shoots. As the shoot grows the flowers appear on a stem from the node, from where leaves have also sprung. That is, grape nodes hold buds that grow into leaves and inflorescences or “clusters of flowers” (i.e., the reproductive portion of a plant) arranged on a smaller stem growing from the node. It is not yet clear, despite recognizing the flow of nutrients and auxins as well as changes in proteins, how, after vernalization (i.e., the ability to flower so that fruit can be set—but only after exposure cold), the plant decides which, leaf or stem bearing flowers, should sprout from the node. The fundamentals of the coming forth of the buds are often outlined as a three-step process. First there is the formation of uncommitted primordia (primordia refer to tissues in their earliest recognizable stages of development) called “anlagen” (from German, in English, “assets” or “facilities”) at the apices of lateral buds. Second, differentiation of anlagen to form inflorescence primordia or tendril primordia occurs. Finally, flowers form from the inflorescence primordia when activated by phytohormones, nutrients, and growth regulators and when the external conditions of light and temperature are correct.
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KLIEWER, W. MARK, and RICHARD E. SMART. "CANOPY MANIPULATION FOR OPTIMIZING VINE MICROCLIMATE, CROP YIELD AND COMPOSITION OF GRAPES." In Manipulation of Fruiting. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-408-02608-6.50023-0.
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BUWALDA, J. G. "Root Growth of Kiwifruit Vines and the Impact of Canopy Manipulations." In Plant Roots and their Environment. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-444-89104-4.50059-1.
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Camerino, Giuseppe A. "Bertòla, Sulzer e il canone della «grazia»." In Vie Lombarde e Venete, edited by Helmut Meter and Furio Brugnolo. DE GRUYTER, 2011. http://dx.doi.org/10.1515/9783110235043.273.
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Schnitzer, Stefan A., and Walter P. Carson. "Ecology of Lianas in the Barro Colorado Nature Monument." In The First 100 Years of Research on Barro Colorado: Plant and Ecosystem Science. Smithsonian Institution Scholarly Press, 2024. https://doi.org/10.5479/si.26882635.
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Lianas (woody vines) are an important component of tropical forests and research on the liana community of the Barro Colorado Nature Monument (BCNM) has helped to elucidate their diversity, natural history, ecology, and role in tropical forest processes. More than half of the canopy trees in old-growth forests, such as the one on Barro Colorado Island (BCI), host lianas in their crowns. Both observational and experi -mental studies have demonstrated that lianas reduce tree recruitment, growth, reproduction, and survival, resulting in reduced forest biomass uptake and lower carbon storage. Because lianas have a stronger negative effect on the performance of some tree species than on others, they may influence tree community composition. Lianas also appear to promote animal diversity by providing resources, nesting sites, and connectivity among canopy trees. Research on the lianas of the BCNM has fundamentally advanced our understanding of liana ecology and their role in tropical forests.<p></p>
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Lauter, Paul. "University Reform: Threat or Opportunity." In Canons and Contexts. Oxford University Press, 1991. http://dx.doi.org/10.1093/oso/9780195055931.003.0017.
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When you feel yourself beginning to slide down a cliff, you are not likely to think too hard about what it is you grab to stop the fall. But the choice of handholds makes a difference—the difference between continuing to plunge and holding on long enough to plant your feet. As you descend, what seems a vine turns out to be a viper, and what seems a solid trunk proves rootless and tears away. So it is as faculty have contended with the growing shelf of studies criticizing, occasionally analyzing, and mostly prescribing for, higher education. We feel the structure, the norms of our profession, shifting and sliding beneath our feet. We reach for a handhold, a point of stability, and discover, alas, that there’s little that is reliable, much that is frail and fragile. Three of the mid-1980s higher education studies1 were among the opening shots in what has become an extended battle over the character and quality of the institutions in which professors work, as well as over what exactly it is that faculty and staff do. One could, of course, dismiss these and more recent studies, perhaps citing their manifold banalities as sufficient reason for indifference. Or, as faculty, we could acquiesce, agreeing to such changes as the reformists are able to compel, but doing little more than what is necessary to protect our turf. Either course is rationally defensible. Neither is advisable for the academic community. It seems to me that either indifference or generalized resistance would be mistaken—for at least two reasons. First, this has proven to be an unusually strong tide of reform, and even now, half a decade later, it seems still to be waxing. Even from the perspective of strict self-interest, not an unfamiliar ground for academics to stand upon, it would be dangerous to ignore what is a continuing effort to reshape the character of our work and lives. Second, the drive to reform college education presents faculty and staff with an opportunity to shape the direction of change, and in particular to raise what none of these reports really contends with: What political values, what economic forms, what social objectives do we really wish to pursue?
Conference papers on the topic "Vine canopy"
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Marinello, Francesco, Giulio Toniolo, Tatevik Yezekian, and Luigi Sartori. "Characterization of vine canopy through two dimensional imaging." In 16th International Scientific Conference Engineering for Rural Development. Latvia University of Agriculture, 2017. http://dx.doi.org/10.22616/erdev2017.16.n147.
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Pascuzzi, Simone, Francesco Paciolla, Giovanni Popeo, Tommaso Quartarella, Francesco Vicino, and Alessia Farella. "Study and setting-up of autonomous terrestrial rover suitable for monitoring activities in "tendone" trained vineyards." In 24th International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies, 2025. https://doi.org/10.22616/erdev.2025.24.tf072.
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According to the Italian National Institute of Statistics (ISTAT, 2023), Apulia (Southern Italy) is the Italian region with the highest production of table grape. The typical vine training system is the “pergolato” or “tendone”, whose primary characteristic is the arrangement of the canopy on an unbroken horizontal plane, sustained by a grid of steel wires located at 1.7-1.8 m above the soil, in turn supported by wood stakes placed near the vines. Currently, “tendone” vineyards are covered both with anti-hail nets and sheets that allow them to accelerate or delay the ripening of the bunches, depending on the cultivar of the vine. The presence of the sheets does not allow remote sensing activities using unmanned aerial vehicles (UAVs), aimed at monitoring the canopy condition. In this context, the authors have designed, assembled and fine-tuned an autonomous robotic system prototype for carrying out monitoring activities in such type of vineyards. Practically, contrary to what would be done by UAVs, the robot prototype in question makes it possible to evaluate the conditions of both the vegetation and fruiting from below, by autonomously crossing the inter-rows according to established routes. The evaluation of vegetative indices is performed by RGB and NIR cameras, equipped with active sensors. The acquired images, suitably processed, as well as the data obtained from on-board sensors about soil characteristics, will allow the farmer to assess the possible presence of biotic and abiotic stresses of the plants and then make timely decisions on the action to be carried out. The task that the rover in question performs is very helpful in the current context of sustainable precision agriculture, which requires to integrate innovative technologies (sensors, drones, software, satellites, etc.) to targeted agronomic actions, based on actual cultivation needs.
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Šupčík, A., and V. Beranová. "78. Grape yield prediction based on vine canopy morphology obtained by 3D point clouds from UAV images." In 14th European Conference on Precision Agriculture. Wageningen Academic Publishers, 2023. http://dx.doi.org/10.3920/978-90-8686-947-3_78.
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Monerris, A., A. Camps, and M. Vall-llossera. "Empirical determination of the soil emissivity at L-band: Effects of soil moisture, soil roughness, vine canopy, and topography." In 2007 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2007. http://dx.doi.org/10.1109/igarss.2007.4422996.
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Pasinetti, Simone, Mauro Maesano, Elena Brunori, et al. "Introducing on-the-go sensing rover for vines canopy abiotic stressors detection." In 2022 IEEE International Workshop on Metrology for Agriculture and Forestry (MetroAgriFor). IEEE, 2022. http://dx.doi.org/10.1109/metroagrifor55389.2022.9965084.
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Grella, M., P. Marucco, E. Mozzanini, et al. "14. Effects of canopy density-based airblast fan airflow adjustment on vines spray deposit." In 14th European Conference on Precision Agriculture. Wageningen Academic Publishers, 2023. http://dx.doi.org/10.3920/978-90-8686-947-3_14.
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Jin, Dongliang, Songhao Zhu, Xian Sun, Zhiwei Liang, and Guozheng Xu. "Fusing Canny operator with vibe algorithm for target detection." In 2016 Chinese Control and Decision Conference (CCDC). IEEE, 2016. http://dx.doi.org/10.1109/ccdc.2016.7530965.
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Chen, Lingling, Songhao Zhu, and Xiangxiang Li. "Target Detection Via Combining Canny Operator With Vibe Method." In 2015 International Symposium on Computers and Informatics. Atlantis Press, 2015. http://dx.doi.org/10.2991/isci-15.2015.99.
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Mukherjee, Tapati. "Focusing Cultural Affinity Among South Asian Cultures, Cutting Across Geo-spatial Barrier: Rabindranath Tagore and His Multi-dimensional Creativity." In XII Congress of the ICLA. Georgian Comparative Literature Association, 2024. http://dx.doi.org/10.62119/icla.1.8205.
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In a jet – set globalized world where change is the only con-stant as an aftermath of phenomenal progress in science and tech-nology, we are at ease to interact with various cultures, pertaining to various countries, nations and groups. But it is indeed amazing that even in the nineteenth century, a poet and litterateur of as-tounding magnitude in British ruled – India – Rabindranath Tagore, the first Nobel Laureate of Asia could visualize the idea of a one world across geo – political boundary. Notwithstanding his multiple visits to Europe and America, his fascination for Asian countries has been revealed through his five trips to Japan, China, Ceylon, Persia etc. In his attempt to trace the root of affinity among these cultures of South Asian countries, he had imbibed inspiration from their literature, art and above all lifestyle and this cultural interaction has been delineated in his travelogues like Way to Japan, In Persia etc. The Japanese style of short poem Heiku composed in two/three lines had impressed him so much that he started writing Heiku poems in Bangla. Japanese drawing, flower decoration, tea ceremo-nies etc. were so favorite to him that he requested his nephews to visit Japan just to get training in that art. The most poignant expression of this cultural interaction between Tagore and South Asian countries was reflected in the idea of Visva Bharati, his cherished institution where South Asian impetus is distinctly visible. The dance technique, choreography and music which he invented for his musical and dance dramas reflect the profound impact of Sri Lankan Candy dance and other techniques. In the same token, Sri Lanka, bent on westernization at the cost of their indigenous culture, could make a cultural revival under the influence of Tagore. In the present paper, there will be a humble attempt to show how cultural pluralism among diverse South Asian cultures could materialize through the aegis of Tagore, how he could institutiona-lize these diverse influences in his institution through exchange programme of teachers and students and above all how this idea of ingrained oneness was permeated in his creative works, in essays, travelogues, art and fine arts like dance. Tagore’s reception in South Asian countries and the impact exerted by him vice – versa can be cited as an example of cultural assimilation.
Reports on the topic "Vine canopy"
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Kliewer, Mark, Shimon Lavee, and J. A. Wolpert. Integrated Canopy Management Practices for Optimizing Vine Micro-Climate, Crop Yield, and Quality of Table and Wine Grapes. United States Department of Agriculture, 1991. http://dx.doi.org/10.32747/1991.7695832.bard.
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_TCHIBOZO-KEKELE, Chanceline, Rodrigue Castro GBEDOMON, Laurenda TODOME, and Fréjus Sourou THOTO. Plan Canopée de la ville d’Abomey-Calavi : Où planter, quoi planter, comment planter pour une ville plus verte, attrayante et source de bien-être ? ACED, 2024. http://dx.doi.org/10.61647/aa95752.
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Ce document présente le Plan Canopée de la ville d'Abomey-Calavi, au Bénin. L'objectif est d'accroître de manière significative le couvert arboré de la ville afin d'améliorer la qualité de vie des habitants. L'étude a tout d'abord dressé un diagnostic précis de la situation actuelle de la canopée dans la ville. Elle a montré que le taux de canopée est très inégal, atteignant 46,2% dans les zones périurbaines mais seulement 17,7% dans les quartiers urbains. Ce déficit important, notamment dans les quartiers les plus densément peuplés, est préoccupant car il a des impacts négatifs sur la santé et le bien-être des populations. Pour remédier à cette situation, la ville d'Abomey-Calavi s'est fixé comme objectif d'accroître le couvert arboré de 12,3% d'ici 2030, tout en préservant le potentiel existant. Cela représente un effort d'arborisation moyen de 12 000 arbres par an. Les espèces d'arbres sélectionnées pour cette opération ont été choisies pour leurs capacités à fournir des services écosystémiques clés (filtration de l'air, régulation de la température, etc.) tout en minimisant les nuisances. La mise en œuvre de ce Plan Canopée nécessitera l'engagement et l'implication de tous les acteurs de la ville : ménages, gestionnaires du patrimoine arboré, société civile et entreprises. C'est un effort collectif pour transformer Abomey-Calavi en une ville plus verte, attrayante et source de bien-être pour tous.
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Heitman, Joshua L., Alon Ben-Gal, Thomas J. Sauer, Nurit Agam, and John Havlin. Separating Components of Evapotranspiration to Improve Efficiency in Vineyard Water Management. United States Department of Agriculture, 2014. http://dx.doi.org/10.32747/2014.7594386.bard.
Full textAbstract:
Vineyards are found on six of seven continents, producing a crop of high economic value with much historic and cultural significance. Because of the wide range of conditions under which grapes are grown, management approaches are highly varied and must be adapted to local climatic constraints. Research has been conducted in the traditionally prominent grape growing regions of Europe, Australia, and the western USA, but far less information is available to guide production under more extreme growing conditions. The overarching goal of this project was to improve understanding of vineyard water management related to the critical inter-row zone. Experiments were conducted in moist temperate (North Carolina, USA) and arid (Negev, Israel) regions in order to address inter-row water use under high and low water availability conditions. Specific objectives were to: i) calibrate and verify a modeling technique to identify components of evapotranspiration (ET) in temperate and semiarid vineyard systems, ii) evaluate and refine strategies for excess water removal in vineyards for moist temperate regions of the Southeastern USA, and iii) evaluate and refine strategies for water conservation in vineyards for semi-arid regions of Israel. Several new measurement and modeling techniques were adapted and assessed in order to partition ET between favorable transpiration by the grapes and potentially detrimental water use within the vineyard inter-row. A micro Bowen ratio measurement system was developed to quantify ET from inter-rows. The approach was successful at the NC site, providing strong correlation with standard measurement approaches and adding capability for continuous, non-destructive measurement within a relatively small footprint. The environmental conditions in the Negev site were found to limit the applicability of the technique. Technical issues are yet to be solved to make this technique sufficiently robust. The HYDRUS 2D/3D modeling package was also adapted using data obtained in a series of intense field campaigns at the Negev site. The adapted model was able to account for spatial variation in surface boundary conditions, created by diurnal canopy shading, in order to accurately calculate the contribution of interrow evaporation (E) as a component of system ET. Experiments evaluated common practices in the southeastern USA: inter-row cover crops purported to reduce water availability and thereby favorably reduce grapevine vegetative growth; and southern Israel: drip irrigation applied to produce a high value crop with maximum water use efficiency. Results from the NC site indicated that water use by the cover crop contributed a significant portion of vineyard ET (up to 93% in May), but that with ample rainfall typical to the region, cover crop water use did little to limit water availability for the grape vines. A potential consequence, however, was elevated below canopy humidity owing to the increased inter-row evapotranspiration associated with the cover crops. This creates increased potential for fungal disease occurrence, which is a common problem in the region. Analysis from the Negev site reveals that, on average, E accounts for about10% of the total vineyard ET in an isolated dripirrigated vineyard. The proportion of ET contributed by E increased from May until just before harvest in July, which could be explained primarily by changes in weather conditions. While non-productive water loss as E is relatively small, experiments indicate that further improvements in irrigation efficiency may be possible by considering diurnal shading effects on below canopy potential ET. Overall, research provided both scientific and practical outcomes including new measurement and modeling techniques, and new insights for humid and arid vineyard systems. Research techniques developed through the project will be useful for other agricultural systems, and the successful synergistic cooperation amongst the research team offers opportunity for future collaboration.