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Journal articles on the topic 'Relative yield total'

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Published: 4 June 2021

Last updated: 4 February 2022

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1

Drewry, J. J., R. P. Littlejohn, R. J. Paton, P. L. Singleton, R. M. Monaghan, and L. C. Smith. "Dairy pasture responses to soil physical properties." Soil Research 42, no. 1 (2004): 99. http://dx.doi.org/10.1071/sr03055.

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Relationships between relative seasonal pasture yields (total, spring, or summer/autumn) and soil physical properties were investigated. Dairy farm data were collected from trials over 7 years. There were few significant response relationships between total relative yield and each soil physical property at each soil depth, from 0 to 20 cm. Macroporosity (air-filled porosity; pores >30 μm), percentage of pores >300 μm, and total porosity at both 0–5 and 5–10 cm soil depths all had highly significant positive relationships with spring relative yield, with the best fit being for macroporosi

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2

Ofori, Francis, and W. R. Stern. "Relative Sowing Time and Density of Component Crops in a Maize/Cowpea Intercrop System." Experimental Agriculture 23, no. 1 (1987): 41–52. http://dx.doi.org/10.1017/s0014479700001113.

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SUMMARYThe effect of variations in the relative sowing time and density of component crops in a maize/cowpea intercrop were examined in two experiments. In the first experiment, maize and cowpea were sown together, and either 10 or 21 days before or after each other. Maize yield was reduced when sown at the same time or after cowpea; intercrop cowpea yields were less than sole cowpea yields at all sowings. In the second experiment, maize densities of 35, 50 and 70 × 103 plants ha−1 were combined with cowpea densities of 70, 100 and 140 × 103 plants ha−1. Increasing the density of either crop i

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3

Ofori, Francis, and W. R. Stern. "Relative Sowing Time and Density of Component Crops in a Maize/Cowpea Intercrop System." Experimental Agriculture 23, no. 1 (1987): 41–52. http://dx.doi.org/10.1017/s0014479700003392.

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SUMMARYThe effect of variations in the relative sowing time and density of component crops in a maize/cowpea intercrop were examined in two experiments. In the first experiment, maize and cowpea were sown together, and either 10 or 21 days before or after each other. Maize yield was reduced when sown at the same time or after cowpea; intercrop cowpea yields were less than sole cowpea yields at all sowings. In the second experiment, maize densities of 35, 50 and 70 × 103plants ha−1were combined with cowpea densities of 70, 100 and 140 × 103plants ha−1. Increasing the density of either crop in t

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4

Holt, Nathan M., and Linda J. Young. "Testing the Assumption of Constant Relative Yield Total in Replacement Series Experiments." Sri Lankan Journal of Applied Statistics 5, no. 4 (2014): 33. http://dx.doi.org/10.4038/sljastats.v5i4.7783.

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5

Beltrao, Jose, Gulom Bekmirzaev, Jiftah Ben Asher, Manuel Costa, and Thomas Panagopoulos. "Linear Relationship of a Soil Total Water Potential Function and Relative Yield—A Technique to Control Salinity and Water Stress on Golf Courses and Other Irrigated Fields." Agronomy 11, no. 10 (2021): 1916. http://dx.doi.org/10.3390/agronomy11101916.

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A simple empirical approach is proposed for the determination of crop relative yield (%) through the soil total water potential (kPa). Recurring to decimal logarithms, from analytical exponential expressions, a linear simple relationship of soil total water potential Ψt (matric Ψm + potential Ψo) function and crop relative yield was studied and developed. The combination of the salinity model, the soil water retention model and the matric potential approach were used to reach this objective. The representation of turfgrass crop relative yield (%) versus a function of soil total water potential

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6

NeSmith, D. S. "Plant Spacing Influences Watermelon Yield and Yield Components." HortScience 28, no. 9 (1993): 885–87. http://dx.doi.org/10.21273/hortsci.28.9.885.

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Watermelon [Citrullus lanatus (Thunb.) Matsum & Nakai] cultivars StarBrite and Crimson Sweet were grown during 1991 and 1992 in rows 1.5 m apart at plant spacings of 0.9, 1.5, or 2.2 m. Total fruit yield, marketable fruit yield, fruit-weight distribution, and estimated gross returns were determined for each spacing treatment. Total and marketable fruit yields were greater overall for `StarBrite' than for `Crimson Sweet'. Except for 1991 `Crimson Sweet' yields, marketable fruit yields per unit land area increased 29% to 34% as plant spacing decreased from 2.2 to 0.9 m. The yield component c

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7

Ding, Xiaotao, Yuping Jiang, Dafeng Hui, et al. "Model Simulation of Cucumber Yield and Microclimate Analysis in a Semi-closed Greenhouse in China." HortScience 54, no. 3 (2019): 547–54. http://dx.doi.org/10.21273/hortsci13703-18.

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Adequate greenhouse environmental management is very important for improving resource use efficiency and increasing vegetable yield. The objective of this study was to explore suitable climate and cultivation management for cucumber to achieve high yield and build optimal yield models in semi-closed greenhouses. A fruit cucumber cultivar Deltastar was grown over 4 years in greenhouse and weekly data of yields (mean, highest and lowest) and environmental variables, including total radiation, air temperature, relative humidity, and carbon dioxide (CO2) concentration were collected. Regression an

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8

Balyan, H. S., and Tejbir Singh. "Character association analysis in common wheat (Triticum aestivum L.)." Genome 29, no. 2 (1987): 392–94. http://dx.doi.org/10.1139/g87-068.

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Grain yield of wheat as a component characteristic of total dry matter (biological) yield is governed by harvest index (V. P. Kulshrestha and H. K. Jain. 1982. Z. Pflanzenzuecht. 89: 19–30). At the phenotypic level, both the grain and biological yields are dependent upon a number of measurable agronomic characteristics such as plant height, tiller number, spike length, and grains per spike, etc. From a breeder's point of view, it is of great value to know the relative significance of these characteristics in determining grain yield to design appropriate selection strategies. The present study

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9

Jokinen, Kari. "Competition and yield advantage in barley-barley and barley-oats mixtures." Agricultural and Food Science 63, no. 4 (1991): 255–85. http://dx.doi.org/10.23986/afsci.72403.

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Competition and yield advantage in barley varietal mixtures and in barley-oats mixtures were investigated. The trials were based on replacement series, but in a few cases the overall density of the stand was varied on the basis of an addition series. Both models of competition, one based on the de Wit model and the other upon a linear regression model, agreed as to which component was the dominant and which was the subordinate in the mixture. The competition coefficients from regression analyses depicted competition between components better in a dense than in a sparse stand. The competitive a

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10

Donald, William W. "Between-Observer Differences in Relative Corn Yield vs. Rated Weed Control." Weed Technology 20, no. 1 (2006): 41–51. http://dx.doi.org/10.1614/wt-04-294r.1.

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Crop yield and weed control rating have been used to measure weed and crop response to weed management treatments, eliminate unacceptable weed management treatments, and select “best” treatments for recommendation to farmers. However, the mathematical relationship between crop yield and rated weed control has not been reported before from such treated screening experiments. Likewise, differences have not been reported before in rated weed control among experienced observers (i.e., reliability) when rating the same experiments and for an experienced observer over time (i.e., repeatability). Dat

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11

Pushpavalli, Raju, Mainassara Zaman-Allah, Neil C. Turner, Rekha Baddam, Mandali V. Rao, and Vincent Vadez. "Higher flower and seed number leads to higher yield under water stress conditions imposed during reproduction in chickpea." Functional Plant Biology 42, no. 2 (2015): 162. http://dx.doi.org/10.1071/fp14135.

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The reproductive phase of chickpea (Cicer arietinum L.) is more sensitive to water deficits than the vegetative phase. The characteristics that confer drought tolerance to genotypes at the reproductive stage are not well understood; especially which characteristics are responsible for differences in seed yield under water stress. In two consecutive years, 10 genotypes with contrasting yields under terminal drought stress in the field were exposed to a gradual, but similar, water stress in the glasshouse. Flower number, flower + pod + seed abortion percentage, pod number, pod weight, seed numbe

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12

McVETTY, P. B. E., S. A. EDIE, and R. SCARTH. "COMPARISON OF THE EFFECT OF nap AND pol CYTOPLASMS ON THE PERFORMANCE OF INTERCULTIVAR SUMMER OILSEED RAPE HYBRIDS." Canadian Journal of Plant Science 70, no. 1 (1990): 117–26. http://dx.doi.org/10.4141/cjps90-014.

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The objective of this study was to compare the performance of male fertility restored intercultivar F1 hybrids in the nap and pol cytoplasms to determine the relative effect on performance of these two male sterility inducing cytoplasms. F1 hybrids (all were 2n = 39 because a common 2n = 40 restorer line was used to produce the F1 hybrids) in both cytoplasms exhibited superior relative performance compared to the conventional cultivar Regent for seed yield, total dry matter and total protein yield. F1 hybrids in the pol cytoplasm performed significantly poorer than F1 hybrids in the nap cytopl

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13

Vavrina, Charles S., Stephen Olson, and J. A. Cornell. "Watermelon Transplant Age: Influence on Fruit Yield." HortScience 28, no. 8 (1993): 789–90. http://dx.doi.org/10.21273/hortsci.28.8.789.

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Total fruit yield of watermelon [Citrullus lanatus (Thunb.) Matsum. and Nakai] in Florida field tests was unaffected by transplant age (3, 4, or 5 weeks from seeding) or modular cell size (18.8, 30.7, or 60.5 cm3), but was affected by trial year. A further study revealed that early and total fruit yields at two field sites were unaffected by transplant age, ranging from 3 to 13 weeks, when grown in the same modular cell size (34 cm3), but were affected by field trial site. We conclude that transplant age or modular cell size is of little importance relative to post-transplanting conditions (si

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14

McCreery, Charles S. "Yield estimation from spectral amplitudes of direct P and P coda recorded by the wake island deep ocean hydrophone array." Bulletin of the Seismological Society of America 77, no. 5 (1987): 1748–66. http://dx.doi.org/10.1785/bssa0770051748.

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Abstract Spectral amplitudes of direct P and P coda between 0.5 and 6 Hz have been measured for 14 Eastern Kazakh test explosions using 8 hydrophones of the Wake Island Array, and a new model for these data has been developed to estimate relative yields of those explosions. Each log spectral amplitude is considered to be the sum of four parameters and an error term. Three parameters are frequency-dependent and represent: (1) the average Eastern Kazakh spectrum at the Wake Island Array; (2) the spectral shape characteristics unique to each event; and (3) the station or hydrophone corrections. T

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15

Sugita, Kazuyuki, Rintaro Matsuo, Ayumu Miyashita, Motoi Kuwabara, Shinya Adachi, and Akinobu Matsuzawa. "Concise Diastereoselective Total Synthesis of (±)-Parvistemonine A." Synlett 31, no. 18 (2020): 1800–1804. http://dx.doi.org/10.1055/s-0040-1707283.

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AbstractWe have developed a concise diastereoselective total synthesis of (±)-parvistemonine A. By using a Mukaiyama–Michael addition, an aza-Wittig reaction, a Paal–Knorr pyrrole synthesis, an acid-mediated annulation, and a Mitsunobu reaction as key steps, we achieved a total synthesis in which the longest linear sequence was ten steps and the overall yield was 19.6%. Additionally, the relative stereochemistry of parvistemonine A was confirmed by X-ray crystallographic analysis for the first time.

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16

Maynard, Donald N., and Gary W. Elmstrom. "YIELD AND QUALITY OF TRIPLOID WATERMELON HYBRIDS." HortScience 25, no. 8 (1990): 859f—859. http://dx.doi.org/10.21273/hortsci.25.8.859f.

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Evaluations of 30 triploid (seedless) watermelon hybrids were conducted in the Spring 1989 season at Bradenton and Leesburg, Florida. There was considerable variation in relative cultivar yields at the two locations. However, consistency in some cultivars did occur. 'HMX 7924' produced the highest total yield and 'CFREC 88-2' had high total yields at both locations. On the other hand, 'ACX 882322', 'Fengshan No. 1', 'FMX 28', 'Fummy', 'Honeyheart', 'Nova', and 'NVH 4295' produced low total yields at both locations. Average fruit weight was high for 'Ssuper Sweet Brand 5244', 'CFREC 88-4', and

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17

YOO, BYOUNGSEUNG, and M. A. RAO. "Yield Stress and Relative Viscosity of Tomato Concentrates: Effect of Total Solids and Finisher Screen Size." Journal of Food Science 60, no. 4 (1995): 777–79. http://dx.doi.org/10.1111/j.1365-2621.1995.tb06227.x.

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18

Newman, S. M. "A Pear and Vegetable Interculture System: Land Equivalent Ratio, Light Use Efficiency and Productivity." Experimental Agriculture 22, no. 4 (1986): 383–92. http://dx.doi.org/10.1017/s0014479700014630.

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SUMMARYThe productivity, land equivalent ratios (LERs) and light use efficiency of a pear and radish interculture system were assessed. Pear yield was unaffected by intercropping. Relative yields for the radish component varied between 0.5–1.01 depending upon the yield index and spatial arrangement employed. This gave LER values for the system of 1.5–2.01. The overall trans-missivity of the pear canopy was 73%. A 47% reduction in photosynthetically active radiation (PAR) gave a yield reduction of 65% in terms of number of saleable radish, but did not affect total dry matter productivity. Reduc

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19

Todd, Steven M., Van-Den Truong, Kenneth V. Pecota, and G. Craig Yencho. "Combining Ability of Sweetpotato Germplasm for Yield, Dry Matter Content, and Anthocyanin Production." Journal of the American Society for Horticultural Science 140, no. 3 (2015): 272–79. http://dx.doi.org/10.21273/jashs.140.3.272.

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Interest in the potential of sweetpotato (Ipomoea batatas) for the production of industrial products is increasing. As part of an effort to evaluate the potential of sweetpotatoes for starch and anthocyanin production in the southeastern United States, a 5 × 5 North Carolina mating design II (NCII mating design) was developed to estimate the relative importance of general and specific combining abilities for dry matter (DM) content, total monomeric anthocyanin (TMA) concentration, fresh yield, and total DM and anthocyanin yields. All five traits had significant general combining abilities (GCA

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20

Xu, C., and D. I. Leskovar. "Growth, physiology and yield responses of cabbage to deficit irrigation." Horticultural Science 41, No. 3 (2014): 138–46. http://dx.doi.org/10.17221/208/2013-hortsci.

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Field experiments were conducted in two seasons to investigate growth, physiology and yield responses of cabbage (Brassica oleracea L. cvs Pennant and Rio Grande) to deficit irrigation. In 2012 season, 50% of crop evapotranspiration (ETc) irrigation temporarily decreased plant size, reduced leaf area, fresh weight, relative water content, specific leaf area and gas exchange during late development, and decreased head fresh weight, size, marketable and total yield. Deficit irrigation at 75% ETc had little influence on plant growth and physiology, but it still reduced both marketable and total y

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21

Balanovsky, O. P., ZhA Kagazezheva, and M. V. Olkova. "Methods for DNA quantification yield similar relative but different absolute values." Bulletin of Russian State Medical University, no. 3 (June 30, 2019): 25–31. http://dx.doi.org/10.24075/brsmu.2019.043.

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DNA quantification is a routine yet important procedure that determines the efficacy of long-term sample storage and further manipulations with the sample. There are a few well-established methods for measuring DNA concentrations. However, it still not fully clear how concordant their results are. The aim of this work was to measure DNA concentrations in a set of samples using different quantification methods and to compare the obtained values. In 2 independent experiments, a total of 100 genomic DNA samples were analyzed using 3 different DNA quantification methods, including spectrophotometr

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22

Botwright, T., N. Mendham, and B. Chung. "Effect of density on growth, development, yield and quality of kabocha (Cucurbita maxima)." Australian Journal of Experimental Agriculture 38, no. 2 (1998): 195. http://dx.doi.org/10.1071/ea97037.

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Summary. The effect of plant density on growth, development, yield and quality of kabocha (buttercup squash) (Cucurbita maxima) was examined during 1992–93, at a field site in Cambridge, Tasmania. Plant densities ranged between 0.5 and 4.7 plants/m2. Marketable and total yields were fitted to a yield–density model. Total yield followed an asymptotic trend, approaching 33 t/ha at 4.7 plants/m2, while marketable yield had a parabolic relationship with density. Marketable yield increased to a maximum of 18 t/ha at 1.1 plants/m2, while declining at higher densities because of increased numbers of

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23

Djaman, Koffi, Curtis Owen, Margaret M. West, et al. "Relationship between Relative Maturity and Grain Yield of Maize (Zea mays L.) Hybrids in Northwest New Mexico for the 2003–2019 Period." Agriculture 10, no. 7 (2020): 290. http://dx.doi.org/10.3390/agriculture10070290.

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The highly variable weather under changing climate conditions affects the establishment and the cutoff of crop growing season and exposes crops to failure if producers choose non-adapted relative maturity that matches the characteristics of the crop growing season. This study aimed to determine the relationship between maize hybrid relative maturity and the grain yield and determine the relative maturity range that will sustain maize production in northwest New Mexico (NM). Different relative maturity maize hybrids were grown at the Agricultural Science Center at Farmington ((Latitude 36.69° N

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24

Bi, H., and ND Turvey. "Inter-Specific Competition Between Seedlings of Pinus radiata, Eucalyptus regnans and Acacia melanoxylon." Australian Journal of Botany 42, no. 1 (1994): 61. http://dx.doi.org/10.1071/bt9940061.

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A replacement series experiment was carried out to determine the competitive aggressiveness of three species, P. radiata, E. regnans and A. melanonylon towards each other at seedling stage. Seedlings of the three species were grown at an overall density of six plants per pot for each species combination, providing all combinations of two species from 0:6 to 6:O. In addition, seedlings were grown in pure stands from one plant to six plants per pot for the three species. The relative crowding coefficient, the relative yield total, the relative effects of intra- and inter-specific competition on

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25

Suratman, Mohammed Nazip, Laurie Hodges, James R. Brandle, and Kenneth G. Hubbard. "Wind Protection and Planting Date Affect Snapbean Growth and Yield." HortScience 31, no. 4 (1996): 573e—573. http://dx.doi.org/10.21273/hortsci.31.4.573e.

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The effects of windbreak shelter on growth, total, and marketable yield of snapbeans were evaluated during 1994 and 1995. Plantings of `Strike' and `Rushmore' were made at roughly 2-week intervals in exposed plots and plots protected by tree windbreaks. Air and soil temperature, relative humidity, wind speed and direction were monitored continuously and averaged hourly. Wind speed in shelter was 36% and 43% that of open field wind speed in 1994 and 1995 respectively. Air and soil temperatures were higher in sheltered areas. Sheltered plants had significantly higher total dry weight and leaf ar

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26

Blum, A., J. Mayer, and G. Golan. "Agronomic and physiological assessments of genotypic variation for drought resistance in sorghum." Australian Journal of Agricultural Research 40, no. 1 (1989): 49. http://dx.doi.org/10.1071/ar9890049.

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This study was designed to assess genotypic variability for drought resistance in sorghum (Sorghum bicolor [L.] Moench) and to conclude on the possible physiological differences between drought resistant and drought susceptible genotypes.Grain yield under drought stress ranged from 184 to 943 g m-2 and relative yield ranged from 35.8 to 103.5% among genotypes. Yield (but not relative yield) under stress was decreased (r= -0.89**) with a longer growth duration of gentoypes. Both stover yield and total biomass under stress increased (r = 0.69** and r = 0.72**, respectively), while harvest index

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27

Udensi, Udensi. "Maize Response to Competition from Speargrass (Imperata cylindrica (L.) Raeuschel) Regrowth II: Competitive Relationship-Relative Yield Total." American Journal of Experimental Agriculture 4, no. 10 (2014): 1219–31. http://dx.doi.org/10.9734/ajea/2014/9029.

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28

Dirks, Inga, Juliane Streit, and Catharina Meinen. "Above and Belowground Relative Yield Total of Clover–Ryegrass Mixtures Exceed One in Wet and Dry Years." Agriculture 11, no. 3 (2021): 206. http://dx.doi.org/10.3390/agriculture11030206.

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Grassland mixtures hold the potential for increasing biomass and productivity. In a field experiment, monocultures and mixtures of eight white clover (Trifolium repens L.) genotypes and perennial ryegrass (Lolium perenne L.) were analyzed over three years (2015, 2016, and 2018) for their species-specific aboveground and belowground biomass. Roots were analyzed by Fourier transform infrared (FTIR) spectroscopy to identify species-specific root mass, vertical distribution, and belowground relative yield total (RYT). Aboveground biomass decreased strongly from 2015 to 2018. Aboveground and belowg

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29

Kucharik, Christopher J., and Navin Ramankutty. "Trends and Variability in U.S. Corn Yields Over the Twentieth Century." Earth Interactions 9, no. 1 (2005): 1–29. http://dx.doi.org/10.1175/ei098.1.

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Abstract The United States is currently responsible for 40%–45% of the world’s corn supply and 70% of total global exports [the U.S. Department of Agriculture–National Agricultural Statistics Service (USDA–NASS)]. Therefore, analyses of the spatial and temporal patterns of historical U.S. corn yields might provide insight into future crop-production potential and food security. In this study, county-level maize yield data from 1910 to 2001 were used to characterize the spatial heterogeneity of yield growth rates and interannual yield variability across the U.S. Corn Belt. Widespread decadal-sc

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30

Fakorede, M. A. B., and B. O. Opeke. "Weather Factors Affecting the Response of Maize to Planting Dates in a Tropical Rainforest Location." Experimental Agriculture 21, no. 1 (1985): 31–40. http://dx.doi.org/10.1017/s0014479700012229.

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SUMMARYSimple linear correlations, stepwise multiple regressions and path-coefficient analyses were used to determine the relation between grain yield of maize (Zea mays L.) and weather factors in a three year study involving several planting dates within each year. Maximum and minimum relative humidity, which demonstrated negative relationships with yield, were the most reliable factors, both directly and indirectly, for predicting yield. Temperature (including accumulated heat units), sunshine hours and total and effective rainfall generally showed negligible direct effects on yield. Potenti

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Ghersa, Claudio M., and Maria A. Martinez-Ghersa. "A Field Method for Predicting Yield Losses in Maize Caused by Johnsongrass (Sorghum halepense)." Weed Technology 5, no. 2 (1991): 279–85. http://dx.doi.org/10.1017/s0890037x00028104.

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The objective of this research was to modify the senior author's previously developed method for predicting yield losses in maize crops attributable to johnsongrass. The new method is based on the following assumptions: a) relative leaf frequency determines relative biomass; b) total biomass is constant despite the crop/weed ratio; and c) biomass, and therefore leaf frequency, are related to grain yield. Experiments in Argentina from 1986 to 1989 supported the above hypotheses, and the new method was more accurate than the old for predicting relative species biomass in johnsongrass/maize mixtu

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Taverniers, Isabel, Laurens De Meyer, Bart Van Droogenbroeck, Kathy Messens, and Marc De Loose. "Influence of plant developmental stage on DNA yield and extractability in MON810 maize." Agricultural and Food Science 24, no. 2 (2015): 128–38. http://dx.doi.org/10.23986/afsci.41192.

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The amount and extractability of DNA in different parts of MON810 GM hybrid was studied during different developmental stages. To quantify GM contents, an evaluation was performed of the effect of plant development stage on DNA density. To this end, the evolution of weights, absolute DNA yields, DNA densities and ratios of endosperm and embryo relative to total maize kernel were studied. Sampling at four stages during the growth shows an influence on relative GM quantification based on haploid genome equivalents, due to the specific maize seed composition and differences in DNA extractability

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33

Ahadiyat, Yugi Rahayu, Sapto Nugroho Hadi, and Okti Herliana. "Karakter Morfo-fisiologi dan Hasil Padi Gogo Toleran Kekeringan." Jurnal Ilmu Pertanian Indonesia 25, no. 3 (2020): 462–67. http://dx.doi.org/10.18343/jipi.25.3.462.

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The objective of this study was to obtain varieties with high yield along with proper morpho-physiological characters under drought condition. Eleven varieties of upland rice i.e., Gilirang, Situ Patenggang, Kalimutu, Aek Sibundong, Batutegi, Towuti, Sunggal, Danau Gaung, Way Apo Buru, Danau Tempe, and Situ Bagendit were characterized based on morphology, physiology, and yield. Non factorial Complete Randomized Block Design was used with three times repetition. Parameters measured were morphological characters, physiological characters, and yield components. Morphological characters measured w

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34

Ndakidemi, Patrick A., and Felix D. Dakora. "Yield components of nodulated cowpea (Vigna unguiculata) and maize (Zea mays) plants grown with exogenous phosphorus in different cropping systems." Australian Journal of Experimental Agriculture 47, no. 5 (2007): 583. http://dx.doi.org/10.1071/ea05274.

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A 2-factorial experiment, involving three levels of phosphorus (0, 40, and 80 kg/ha) and four cropping systems (mono crop, maize–cowpea inter-row, maize–cowpea intra-row, and maize–cowpea intra-hole cropping) was conducted in the field for two consecutive years in 2003 and 2004 at Nietvoorbij (33°54′S, 18°14′E), Stellenbosch, South Africa. Plant density (number of plants per hectare) was 166 666 for sole cowpea, 111 111 for maize–cowpea inter-row, 55 555 for maize–cowpea intra-row and 55 555 for maize–cowpea intra-hole cropping. Applying 40 or 80 kg phosphorus (P)/ha significantly increased co

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35

POONIYA, VIJAY, YASHBIR SINGH SHIVAY, MADAN PAL, and RADHIKA BANSAL. "RELATIVE PERFORMANCE OF BORON, SULPHUR AND ZINC COATINGS ONTO PRILLED UREA FOR INCREASING PRODUCTIVITY AND NITROGEN USE EFFICIENCY IN MAIZE." Experimental Agriculture 54, no. 4 (2017): 577–91. http://dx.doi.org/10.1017/s0014479717000254.

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SUMMARYDeficiencies of micro (Zn, B) and secondary (S) nutrients are well-documented in soil as well as in cereal crops, leading to decreased crop yields and low nutritional quality of food. We evaluated the effects of coated urea on maize yield, N and Zn uptake, and input cost relationships. Field experiments were conducted on maize to test boron-coated (BCU), sulphur-coated (SCU) and zinc-coated urea (ZnCU) during 2013 and 2014. On the basis of 2 years’ average data, the highest grain yield was achieved with 0.5% BCU, 5% SCU and 2.5% ZnCU as zinc sulphate hepta hydrate. These treatments incr

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O'DONOVAN, M., N. MCHUGH, M. MCEVOY, D. GROGAN, and L. SHALLOO. "Combining seasonal yield, silage dry matter yield, quality and persistency in an economic index to assist perennial ryegrass variety selection." Journal of Agricultural Science 155, no. 4 (2016): 556–68. http://dx.doi.org/10.1017/s0021859616000587.

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SUMMARYA total economic merit index (Pasture Profit Index, PPI) for perennial ryegrass variety selection was developed to rank perennial ryegrass varieties (Lolium perenneL.) based on their economic potential for grass-based ruminant production systems. The key traits of importance identified were: spring, mid-season (April 11–August 10) and autumn dry matter (DM) yield, first and second cut silage DM yield, grass quality April to July (inclusive) and sward persistency. Variety persistency was quantified by determining the ground score (GS) change across years, which was associated with a yiel

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Evans, J., B. Dear, and GE O'Connor. "Influence of an acid soil on the herbage yield and nodulation of five annual pasture legumes." Australian Journal of Experimental Agriculture 30, no. 1 (1990): 55. http://dx.doi.org/10.1071/ea9900055.

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Balansa, persian and subterranean clover and barrel and murex medic were grown in acidic sandy loam in pots in a glasshouse. Four lime treatments (0, 1, 2, 3.5 t/ha) resulted in pH levels of 4.2, 4.7, 5.1 and 6.0 (1:5 CaCl2). After addition of plant nutrients, total exchangeable cations in the nil lime treatment averaged 2.197 cmol(+)/kg, increasing to 4.738 cmol(+)/kg at pH 6.0. With increasing pH, aluminium saturation of the soil exchange was 38, 14, 4 and 3%. The effect of soil acidity on dry matter production was compared between legumes by determining relative yield (yield/maximum yield)

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Patanè, Cristina, and Alessandro Saita. "Biomass, fruit yield, water productivity and quality response of processing tomato to plant density and deficit irrigation under a semi-arid Mediterranean climate." Crop and Pasture Science 66, no. 2 (2015): 224. http://dx.doi.org/10.1071/cp14152.

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A 2-year study was conducted to examine the impact of deficit irrigation on dry biomass, water-use efficiency (WUE), fruit yield and quality in open-field processing tomato at high plant density in a semi-arid environment. Three irrigation treatments (nil; and 100% (full) and 50% (deficit) restoration of crop evapotranspiration (ETc), respectively) and two plant densities (2.5 (P1) and 5.0 (P2) plants m–2) were studied. Dry biomass and fruit yield per plant were lower in P2 than in P1, but at high plant density the crop compensated for biomass and yield decrease at the plant level. Fruit yield

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JONES, M. J., and M. SINGH. "Long-term yield patterns in barley-based cropping systems in Northern Syria. 1. Comparison of rotations." Journal of Agricultural Science 135, no. 3 (2000): 223–36. http://dx.doi.org/10.1017/s0021859699008205.

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Trials, reflecting the feed needs in dry Mediterranean environments of small-ruminant production systems based on barley, were established at two sites in Syria in 1982. They compared various 2-course rotations of barley with feed legumes, fallow or more barley. This paper summarizes a 14-year sequence of results from an incomplete factorial combination of four rotations (B-V, B-L, B-F, B-B) of barley with vetch (Vicia sativa), lathyrus (Lathyrus sativus), fallow, and barley, with two fertilizer regimes, zero control and biennial NP applied to the barley phase, in terms of long-term mean yield

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Assefa, Banchayehu Tessema, Jordan Chamberlin, Pytrik Reidsma, João Vasco Silva, and Martin K. van Ittersum. "Unravelling the variability and causes of smallholder maize yield gaps in Ethiopia." Food Security 12, no. 1 (2019): 83–103. http://dx.doi.org/10.1007/s12571-019-00981-4.

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AbstractEthiopia has achieved the second highest maize yield in sub-Saharan Africa. Yet, farmers’ maize yields are still much lower than on-farm and on-station trial yields, and only ca. 20% of the estimated water-limited potential yield. This article provides a comprehensive national level analysis of the drivers of maize yields in Ethiopia, by decomposing yield gaps into efficiency, resource and technology components, and accounting for a broad set of detailed input and crop management choices. Stochastic frontier analysis was combined with concepts of production ecology to estimate and expl

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Shibly, Nazmun, Rafiqul Islam, Mehfuz Hasan, Nasimul Bari, and Jalal Ahmed. "Evaluation of yield and yield-related traits for waterlogging tolerance in mungbean genotypes using multivariate techniques." Journal of Agricultural Sciences, Belgrade 65, no. 2 (2020): 99–120. http://dx.doi.org/10.2298/jas2002099s.

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Waterlogging is a major constraint of mungbean production in the tropical and subtropical regions of the world and can cause a significant yield loss. The study evaluated 100 mungbean genotypes for tolerance to waterlogging employing rigorous field screening procedures. Three-week-old seedlings of 100 mungbean genotypes were subjected to waterlogging for 3 days maintaining a waterlogging depth of 2.5 cm. Waterlogging tolerance was evaluated during the periods of recovery and final harvest considering relative performance (values of waterlogging relative to non-waterlogging controls) of 18 plan

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Fallahi, Esmaeil, D. Ross Rodney, and Zahra Mousavi. "Growth, Yield, and Fruit Quality of Eight Lemon Cultivars in Arizona." Journal of the American Society for Horticultural Science 115, no. 1 (1990): 6–8. http://dx.doi.org/10.21273/jashs.115.1.6.

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Tree growth, yield, and fruit quality of eight lemon cultivars [Citrus limon (L.) Burro. f.] on macrophylla (Alemow) (C. macrophylla Wester) rootstock were compared when grown in sandy soil in the arid climate of south-western Arizona. `Foothill Lisbon' had higher cumulative yield and titratable acids than `Monroe Lisbon', `Prior Lisbon', `Eureka', and `Villafranca', and had larger fruit than other `Lisbon' cultivars. `Prior Lisbon' produced a larger tree canopy with lower yield efficiency than all other cultivars and did not show any decline due to sieve tube necrosis 12 years after planting.

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Larke, A., A. O’Doherty, and C. Quinn. "High malignancy yield in core needle biopsy of BIRADS 3 breast lesions with calcification." Journal of Clinical Oncology 24, no. 18_suppl (2006): 10568. http://dx.doi.org/10.1200/jco.2006.24.18_suppl.10568.

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10568 Background: Breast cancer screening programmes reduce mortality but result in increased numbers of breast biopsies. Stereotactic and ultrasound-guided core needle biopsy yield similar results to each other and to open biopsy. Study: Analysis of prospectively-acquired data relating to 174,338 screening mammograms performed in BreastCheck between Jan 2001 to Oct 2004. Relative use of ultrasound and stereotactic guidance for core needle biopsy is ascertained, and malignancy yields analysed. Results: In this time period, 174,338 screening mammograms discovered a total of 2782 lesions requiri

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Siose, Taniela K., Danilo F. Guinto, and Mohammed A. Kader. "Organic amendments increased sweetpotato (Ipomoea batatas L.) yield in a calcareous sandy soil of Samoa." South Pacific Journal of Natural and Applied Sciences 36, no. 1 (2018): 36. http://dx.doi.org/10.1071/sp18005.

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A five-month field experiment was conducted to investigate the effects of organic amendments on yields of two sweetpotato cultivars in a calcareous sandy soil of Samoa. The treatments consisted of three organic amendments; gliricidia, gliricidia + biochar, poultry litter, and a control, and two improved sweetpotato cultivars (IB/PH/03 and IB/PR/13). All amendments were applied at equivalent rate of 100 kg N ha–1 while biochar at 5 t ha–1. Plots were arranged in a RCB design with four replicates. Results showed that all organic amendments significantly increased total storage root and marketabl

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Evans, J., G. M. Murray, G. Scott, et al. "Impact of annual legume 'break' crops on the yield and quality of canola in comparison with the impact on yield of wheat." Australian Journal of Experimental Agriculture 46, no. 11 (2006): 1489. http://dx.doi.org/10.1071/ea05203.

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This study investigated the yield, oil and protein content of canola in response to alternative single-season legume crops, and compared the yield response with that of wheat. Two field trials were conducted in consecutive years at Wagga Wagga on the South West Slopes of New South Wales. The soil type was Red Kandasol. The legume treatments were field pea and vetch managed for silage production, vetch managed for green manure, a mixture of aerial seeding clovers (Berseem, Arrowleaf, Persian: 6 : 3 : 3) managed for silage, hay or green manure, and field pea and narrow-leaf lupin managed for gra

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DeJong, Ted M. "601 PB 211 QUANTIFYING YIELD LIMITATIONS IN PEACH TREES." HortScience 29, no. 5 (1994): 518c—518. http://dx.doi.org/10.21273/hortsci.29.5.518c.

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Previous research using relative growth rate models indicates that under normal cropping conditions peach fruit growth and yield is alternately source and sink limited during different phases of fruit growth. An experiment was designed to test this concept on whole trees in the field. Shortly after bloom central leader trees of `Spring Lady' and `Cal Red' peaches, were thinned to various crop loads ranging from -50 to -400 fruit per tree. At specific intervals trees representing the full range of crop loads were harvested to determine mean individual fruit weight/total crop weight relationship

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Musa, Ibrahim, Mohd Y. Rafii, Khairulmazmi Ahmad, et al. "Effects of Grafting on Morphophysiological and Yield Characteristic of Eggplant (Solanum melongena L.) Grafted onto Wild Relative Rootstocks." Plants 9, no. 11 (2020): 1583. http://dx.doi.org/10.3390/plants9111583.

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Grafting is regarded as an integral component of sustainable vegetable production. It is important in the management of soil-borne diseases, and reports suggest that grafting with viable rootstocks can enhance crop growth and yield. This research was conducted using splices and cleft grafting techniques to investigate graft compatibility among varieties of high yielding eggplant scion (MCV1, MCV2, CCV1, CCV2, CCV3, NCV, and TCV) grafted onto wild rootstocks (MWR, BWR, and TWR) to study their morphophysiological and yield characteristics. High yielding scions grafted onto wild relative rootstoc

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Batista, Vanderson Vieira, Paulo Fernando Adami, Laercio Ricardo Sartor, et al. "Forage Yield and Silage Quality of Intercropped Maize+Soybean With Different Relative Maturity Cycle." Journal of Agricultural Science 10, no. 12 (2018): 249. http://dx.doi.org/10.5539/jas.v10n12p249.

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The success of maize+soybean intercrop depends on the correct synchronism between species phenological stages at the silage point. Due to it, the experiment was carried out to evaluate maize+soybean intercrop forage yield and silage quality using crops with different maturity cycle combination. The experiment used a randomized complete block design with a 2 &times; 3 factorial scheme. Treatments consisted of two maize hybrids (1: P1630YHR-early cycle and 2: middle cycle P30F53VYHR) and two soybean cultivars (P95R51-maturity cycle of 5.1; TMG7062-maturity cycle of 6.2) and one control repre

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Sanders, D. C., L. M. Reyes, D. W. Monks, K. M. Jennings, F. J. Louws, and J. G. Driver. "INFLUENCE OF COMPOST ON VEGETABLE CROP NUTRIENT MANAGEMENT." HortScience 41, no. 3 (2006): 508A—508. http://dx.doi.org/10.21273/hortsci.41.3.508a.

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Tomato, pepper and cucumber were grown for consecutive years using compost from two North Carolina cities (Lexington and Edenton) and McGill Composts (CMC) sources and CMC amended with Tracoderma 382. Treatments included compost with an untreated control and Telone C-35 (Telone) with and without additional fertilizer. The objective was to evaluate compost influence on yield and pest management. Results showed significant differences between treatments and among years. Cucumber and pepper had higher total and marketable yields in 2005 than in 2004. Although tomato yield was lower in 2005 than i

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Sanders, D. C., L. M. Reyes, D. W. Monks, K. M. Jennings, F. J. Louws, and J. G. Driver. "INFLUENCE OF COMPOST ON VEGETABLE CROP NUTRIENT MANAGEMENT." HortScience 41, no. 3 (2006): 509C—509. http://dx.doi.org/10.21273/hortsci.41.3.509c.

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Tomato, pepper, and cucumber were grown for consecutive years using compost from two North Carolina cities (Lexington and Edenton) and McGill Composts (CMC) sources and CMC amended with Tracoderma 382. Treatments included compost with an untreated control and Telone C-35 (Telone) with and without additional fertilizer. The objective was to evaluate compost influence on yield and pest management. Results showed significant differences between treatments and among years. Cucumber and pepper had higher total and marketable yields in 2005 than in 2004. Although tomato yield was lower in 2005 than

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