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Articoli di riviste sul tema "Yields"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Tautges, Nicole, Claire Flavin, Thomas Michaels, et al. "Rotating alfalfa with dry bean as an alternative to corn-soybean rotations in organic systems in the Upper Midwest." Renewable Agriculture and Food Systems 34, no. 1 (2017): 41–49. http://dx.doi.org/10.1017/s1742170517000321.

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AbstractDry bean (Phaseolus vulgaris) can be grown as a local food source and as an alternative to soybean (Glycine max) to diversify organic crop rotations. To understand the benefits of diversification of organic cropping systems, the effects of preceding alfalfa (Medicago sativa) and corn (Zea mays) crops on yields of five dry bean types and one soybean type, and the effect of bean type on following spring wheat (Triticum aestivum) yields, were tested at four Minnesota locations. Dry bean and soybean yields following alfalfa were 25% greater than yields following corn at two of four locatio

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2

HOEKSTRA, G. J., L. W. KANNENBERG, and B. R. CHRISTIE. "GRAIN YIELD COMPARISON OF PURE STANDS AND EQUAL PROPORTION MIXTURES FOR SEVEN HYBRIDS OF MAIZE." Canadian Journal of Plant Science 65, no. 3 (1985): 471–79. http://dx.doi.org/10.4141/cjps85-068.

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The objective of this study was to compare yielding ability and competitive effects in pure stands and equal-proportion mixtures of maize hybrids. Seven maize (Zea mays L.) hybrids were grown for 2 yr in pure stand and in all equal-proportion, two-component mixtures at plant densities of 61 500 and 136 000 plants per hectare. In 1978, a year of severe moisture stress, mixtures yielded 6% more grain on average than expected on the basis of pure stand yields. Half of the mixtures yielded more than the pure stand yield of the high-yielding component; however, one mixture yielded significantly les

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3

Pelikán, J. "Yield evaluation of varieties from the world collection of birdsfoot trefoil (Lotus corniculatus L.)." Plant, Soil and Environment 48, No. 6 (2011): 265–70. http://dx.doi.org/10.17221/4240-pse.

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In field trials in 1998&ndash;2000, ten varieties of the world collection of birdsfoot trefoil (Lotus corniculatus) were evaluated for herbage and hay yields. In all the years of testing yields from three cuttings and total annual production were evaluated. In 1999, seed yield was also recorded. As a&nbsp;control, alfalfa (Medicago sativa) variety was included in the experiment. The test varieties showed good productivity in the first and especially in the second year of testing, most of them exceeded alfalfa in herbage yield in individual cuttings and in total productions. As for hay

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4

Gupta, M. L., and R. C. Gautam. "Effect of Source and Rate of Phosphorus on Yield and Yield Attributes of Rice." International Rice Research Newsletter 13, no. 3 (1988): 27. https://doi.org/10.5281/zenodo.7136056.

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This article 'Effect of Source and Rate of Phosphorus on Yield and Yield Attributes of Rice' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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5

Pilbeam, C. J., G. Duc, and P. D. Hebblethwaite. "Effects of plant population density on spring-sown field beans (Vicia faba) with different growth habits." Journal of Agricultural Science 114, no. 1 (1990): 19–33. http://dx.doi.org/10.1017/s0021859600070957.

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SUMMARYDeterminate varieties of Vicia faba are smaller and may require higher plant population densities than their conventional indeterminate counterparts to attain high yields. This hypothesis was examined at the University of Nottingham farm at Sutton Bonington, UK, and at INRA, Dijon, France in 1986 and 1987. The determinate varieties Ticol and TP667 and indeterminate M5.1 and Maris Bead were sown in the spring to give a range of densities of 10–100 plants/m2.Yields generally increased as population density increased. The optimum density for determinate varieties was higher than for indete

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6

Taylor, B. R., and J. Y. Chambi. "Sesame Agronomy in South-east Tanzania. I. Plant Population and Sowing Method." Experimental Agriculture 22, no. 3 (1986): 243–51. http://dx.doi.org/10.1017/s0014479700014411.

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SUMMARYField trials are described in which the seed yield response of row-sown sesame to increasing plant population was examined, and in which row-sowing was compared with broadcasting at different seed rates. Maximum yields were obtained at an intended 200 to 250 × 103 plants ha−1 but yields were not greatly affected by a wider range of populations. Broadcasting, the normal local practice, gave yields slightly higher than those from rows 50 cm apart, the un-thinned rate of 800 × 103 viable seeds sown ha−1 yielded as well as treatments thinned to the optimum population, and double this seed r

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7

Jubinski, Daniel, and Amy F. Lipton. "Equity volatility, bond yields, and yield spreads." Journal of Futures Markets 32, no. 5 (2011): 480–503. http://dx.doi.org/10.1002/fut.20521.

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8

Narwal, S. S., D. S. Dahiya, G. Singh, and D. S. Malik. "Response of maize cultivars to sowing in the winter." Journal of Agricultural Science 109, no. 2 (1987): 303–7. http://dx.doi.org/10.1017/s0021859600080722.

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SummaryIn a 2-year field study, all the maize cultivars tried (Partap-1 Ageti-76, Ganga-5 and DHM-103) produced similar length of ears and equivalent grain yields. However, Partap-1 and Ganga-5 produced greater 100-kernel weight and greater grain yield per ear but fewer ears per hectare than Ageti-76 and DHM-103. The yield attributes and grain yields of maize sown on 19 December, 29 December and 8 January were identical and were superior to those of the 19 January sowing. Maize sown on 19 December, 29 December and 8 January exhibited longer ears, more ears and fully developed kernels and there

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9

Reid, PE, NJ Thomson, PK Lawrence, DJ Luckett, GT McIntyre, and ER Williams. "Regional evaluation of cotton cultivars in eastern Australia, 1974-85." Australian Journal of Experimental Agriculture 29, no. 5 (1989): 679. http://dx.doi.org/10.1071/ea9890679.

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In 1974, a district cotton cultivar trial was initiated to assess the yield and fibre quality of promising cultivars in all major Australian cotton growing areas over 1 or more years. A nearly 5-fold range in site yields (595-2451 kg/ha) occurred across locations and years. Yields were usually higher in the last 6 years of the trial (overall mean 1688 kg/ha) than in the first half (overall mean 1223 kg/ha). Queensland sites (except Theodore) were lower yielding than average, while New South Wales sites (except Warren) were higher yielding. Deltapine cultivars from the U.S.A. have been the domi

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10

Kulla, L., J. Tutka, and R. Marušák. "Forest yield index and its applicability to the assessment of future forest yields." Journal of Forest Science 55, No. 1 (2009): 41–50. http://dx.doi.org/10.17221/45/2008-jfs.

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The paper suggests and examines a simplified relative indicator of forest production, with special regard to possibilities of its use in projecting future forests. Forest yield index (<I>I</I><sub>Y</sub>), based on an economic parameter “value of final cutting yield” was proposed, and examined in the model territory of Kysuce in north-western Slovakia. The current values of final cutting yield, dependent on tree species, site index and the length of rotation period served as a basis for the assessment of expected yields. The possibilities and limitations of index appli

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11

Thomson, E. F., S. Rihawi, and N. Nersoyan. "Nutritive Value and Yields of Some Forage Legumes and Barley Harvested as Immature Herbage, Hay and Straw in North-West Syria." Experimental Agriculture 26, no. 1 (1990): 49–56. http://dx.doi.org/10.1017/s0014479700015398.

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SUMMARYThe nutritive value and yield of forage legumes and barley harvested as immature herbage, hay and straw were measured in two experiments. The voluntary feed intake of peas at all stages of maturity and immature herbage from woollypod vetch was substantially lower than that of common vetch and chickling. At each stage of maturity barley was less digestible than all the forages except immature peas. Despite exceptionally cold weather in February/March 1985, yields of common vetch were higher in 1984/85 than in 1985/86 when there was less rain. Peas yielded the most hay, and chickling yiel

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12

Bussan, Alvin J., Orvin C. Burnside, James H. Orf, Eric A. Ristau, and Klaus J. Puettmann. "Field evaluation of soybean (Glycine max) genotypes for weed competitiveness." Weed Science 45, no. 1 (1997): 31–37. http://dx.doi.org/10.1017/s0043174500092444.

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In the first of 2 field studies, weed biomass and soybean seed yield were used to evaluate 16 soybean genotypes for competitive ability against 12 weed species at Rosemount, MN, in 1992 and 1993. The yield and ranking of soybean genotypes often varied with the weed species. Grass weed species reduced yields the most, and small-seeded broadleaf weeds reduced yields the least across years. ‘Parker’ was highly competitive, as it suppressed weed biomass and produced high soybean yield. ‘Kato,’ ‘Kasota,’ ‘Dawson,’ and ‘Glenwood’ minimized weed biomass and maintained soybean yield while in competiti

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13

Brumfield, R. G., F. E. Effiom, and S. Reiners. "ECONOMIC ANALYSIS OF THREE TOMATO PRODUCTION SYSTEMS." HortScience 27, no. 6 (1992): 664e—664. http://dx.doi.org/10.21273/hortsci.27.6.664e.

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Fresh tomatoes grown under three production cropping systems at the Rutgers University's Snyder Research and Extension Farm were compared for differences in yields, gross revenues, production costs and net returns. Maximum marketable yields were obtained using the Integrated Pest Management (IPM) system, followed closely by the conventional system. Yields of the organic plots were only 54 percent of the conventional yield. However, the organic plots yielded only 17 percent culls whereas the IPM plots yielded 37 percent culls. Fifty-two percent of the organic tomatoes were U.S. Number Ones, whi

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14

Bevilaqua, Julia, Galina B. Hale, and Eric Tallman. "Corporate yields and sovereign yields." Journal of International Economics 124 (May 2020): 103304. http://dx.doi.org/10.1016/j.jinteco.2020.103304.

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15

Thompson, Paul G. "Multiple-harvest Yield Prediction from Once-over Harvests of Cowpeas." HortScience 21, no. 6 (1986): 1340–44. http://dx.doi.org/10.21273/hortsci.21.6.1340.

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Abstract The relationship between yields of eowpea [Vigna unguiculata (L.) Walp.] cultivars multiple-harvested (MH) at the mature-green stage and once-over harvested (OH) at two later stages of maturity was linear. Coefficients of determination of 0.82 and 0.86 showed that OH yields at later stages of maturity accounted for a high percentage of the variability in MH yield. Once-over harvested yields were consistent predictors of MH yields among planting dates and cultivars. Once-over harvested, shelled yields were as accurate as OH in-pod yields in determining MH yield rankings. Dry weight yie

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16

French, RJ, and MA Ewing. "Soil type influences the relative yields of different cereals and crop legumes in the Western Australian wheatbelt." Australian Journal of Experimental Agriculture 29, no. 6 (1989): 829. http://dx.doi.org/10.1071/ea9890829.

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Crop choice depends on the relative yields of different species, and will vary according to soil type and seasonal conditions. Crop legumes are a relatively new component of agriculture in southern Australia, especially on the drier fringe of the agricultural areas. In this study wheat, barley, field peas and narrow-leafed lupin were compared at Merredin, Western Australia (mean annual rainfall 310 mm) from 1984 to 1986 on a red brown earth, a solonised brown soil, a solodic soil and, in 1984 and 1985, on an acid earthy sand. Oats, cereal rye and triticale were included in 1984, and chickpeas

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17

Guldan, Steven J., Charles A. Martin, Jose Cueto-Wong, and Robert L. Steiner. "Dry-matter and Nitrogen Yields of Legumes Interseeded into Sweet Corn." HortScience 31, no. 2 (1996): 206–8. http://dx.doi.org/10.21273/hortsci.31.2.206.

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Five legumes [hairy vetch (Vicia villosa Roth.), barrel medic (Medicago truncatula Gaerth.), alfalfa (Medicago sativa L.), black lentil (Lens culinaris Medik.), and red clover (Trifolium pratense L.)] were interseeded into sweet corn (Zea mays L.) at last cultivation when sweet corn was at about the V9 (early) or blister (late) stage. The effect of legume interseeding on sweet corn yield, and late-season dry-matter and N yields of aboveground portions of the legumes was determined. Sweet corn yield was not affected by legume interseeding. In 1993, legume dry-matter yields were 1420 kg·ha–1 int

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18

Talebpour, Babak, Maksut Barış Eminoğlu, Uğur Yegül, and Ufuk Türker. "Spatial and Temporal Variation in an Apple Orchard." HortScience 54, no. 12 (2019): 2182–87. http://dx.doi.org/10.21273/hortsci14447-19.

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One important goal of precision horticulture (PH), as well as precision agriculture (PA), is to measure and manage spatial and temporal variation in orchards. In this study, temporal and spatial analysis of yields were carried out over 2 years for a 0.5-ha apple orchard (at the Haymana Research Station of Ankara University, Turkey, from 2017 to 2018) to determine the variability of yields over time and included seven apple varieties: ‘Royal Gala’, ‘Red Chief’, ‘Braeburn’, ‘Mondial Gala’, ‘Jonagold’, ‘Fuji’, and ‘Mitch Gala’. To achieve this, yield data for two different years were analyzed for

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19

Reddy, Belum V. S., N. Seetharama, and L. R. House. "Sorghums in the Post-Rainy Season. I. Effect of Irrigation and Date of Sowing on the Grain and Stover Yields of Diverse Cultivars." Experimental Agriculture 24, no. 1 (1988): 31–36. http://dx.doi.org/10.1017/s0014479700015672.

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SUMMARYIn India, sorghum is grown during the post-rainy season on Vertisols with stored soil moisture. As water stress towards the end of the growing season is believed to be a major cause of poor yields in these crops, an experiment was carried out involving five sorghum genotypes and four sowing dates with and without irrigation.Supplementary irrigation with 40 mm of water in the earliest sown crop increased grain yields by 24 and 26% in 1979 and 1982, respectively, while irrigation with a total of 120mm water in the latest sown crop increased yields by 87 and 60% compared with the correspon

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20

Kravchenko, Alexandra N., Sieglinde S. Snapp, and G. Philip Robertson. "Field-scale experiments reveal persistent yield gaps in low-input and organic cropping systems." Proceedings of the National Academy of Sciences 114, no. 5 (2017): 926–31. http://dx.doi.org/10.1073/pnas.1612311114.

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Knowledge of production-system performance is largely based on observations at the experimental plot scale. Although yield gaps between plot-scale and field-scale research are widely acknowledged, their extent and persistence have not been experimentally examined in a systematic manner. At a site in southwest Michigan, we conducted a 6-y experiment to test the accuracy with which plot-scale crop-yield results can inform field-scale conclusions. We compared conventional versus alternative, that is, reduced-input and biologically based–organic, management practices for a corn–soybean–wheat rotat

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21

Yoder, Keith S. "Effect of Powdery Mildew on Apple Yield and Economic Benefits of Its Management in Virginia." Plant Disease 84, no. 11 (2000): 1171–76. http://dx.doi.org/10.1094/pdis.2000.84.11.1171.

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Plots were established in a ‘Ginger Gold’ apple orchard to test the effects of different powdery mildew levels on cumulative yields. Disease pressure was heaviest in 1997 but yield effects were detected each year. Primary infection in 1997 and 1998 was correlated to previous foliar mildew incidence. Five myclobutanil applications followed by three of triadimefon (M5-T3) reduced primary infections in 1997 to 19% of those on trees not receiving a mildewcide (Ck). M5-T3 gave the most reduction in mildew incidence and severity but a schedule with two less applications (M3-T3) than M5-T3 gave the h

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22

Korkmaz, Ahmet, and Robert J. Dufault. "Influence of Short-term Cyclic Cold Temperature Stress on Muskmelon and Honeydew Yield." HortTechnology 13, no. 1 (2003): 67–70. http://dx.doi.org/10.21273/horttech.13.1.0067.

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Muskmelon (Cucumis melo) seedlings are transplanted in late winter or early spring before last frost date to ensure early yields; however, this makes them very vulnerable to temperatures cycling between almost freezing and optimal temperatures. To simulate temperature alternations that may occur after field transplanting, `Athena', `Sugar Bowl', `Eclipse' muskmelon, and `Tesorro Dulce' honeydew (C. melo) transplants were subjected to 2 ± 1 °C (35.6 ± 1.8 °F) in a walk-in cooler and then to 29 ± 5 °C (84.2 ± 9.0 °F) in a greenhouse before field planting. In 1998, transplants were exposed to 2 °

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23

HUCL, P., and R. J. BAKER. "SEEDING RATE EFFECTS ON LOW-TILLERING SPRING WHEATS IN A SEMIARID ENVIRONMENT." Canadian Journal of Plant Science 70, no. 1 (1990): 9–17. http://dx.doi.org/10.4141/cjps90-002.

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To determine if increased seeding rates would alter relative yields of traditional and low-tillering genotypes, a high-tillering (Neepawa), a low-tillering (Siete Cerros), and an oligoculm (M1417) spring wheat (Triticum aestivum L.) genotype were seeded in replicated field trials at two locations in 1984 and 1985. A four-replication split-plot design, with genotypes assigned to main plots and seeding rates (40, 80 160, 320 and 640 seeds m−2) to subplots, was used for each experiment. Grain yield and its components were measured on individual plots or on main stems of five plants in each plot.

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24

White, Ethel M. "Straw and grain production in spring barley cultivars." Journal of Agricultural Science 108, no. 2 (1987): 293–98. http://dx.doi.org/10.1017/s0021859600079284.

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SummaryGrain and straw yields of a range of spring barley cultivars were assessed in field experiments conducted from 1981 to 1983 in Northern Ireland. Mean straw yields varied between 2·75 t/ha in Inga and 1·94 t/ha in Golden Promise over the 3-year period. Both grain and straw yields varied from year to year, with straw production being more consistent for individual cultivars than grain yield. High grain yields were not associated with high straw yields, straw to grain ratios varying between 0·72 in Midas and 0·51 in Corgi. Neither grain yield nor straw length were good predictors of straw

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25

Suprihatno, B., and B. Sutaryo. "Yield and Yield Components of Some New Rice Hybrids Derived From IR58025 a and IR62829 a in Indonesia." International Rice Research Notes 18, no. 1 (1993): 19. https://doi.org/10.5281/zenodo.6822461.

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This article 'Yield and Yield Components of Some New Rice Hybrids Derived From IR58025 a and IR62829 a in Indonesia' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on t

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26

Bisht, P. S., R. Puniya, P. C. Pandey, and D. K. Singh. "Grain yield and yield components of rice as influenced by different crop establishment methods." International Rice Research Notes 32, no. 2 (2007): 33–34. https://doi.org/10.5281/zenodo.6955835.

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This article 'Grain yield and yield components of rice as influenced by different crop establishment methods' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research rep

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27

Afsana, N., and Z. Islam. "Effects of the ladybird beetle Micraspis discolor on yield components and grain yield of rice." International Rice Research Notes 26, no. 2 (2001): 43–44. https://doi.org/10.5281/zenodo.6955045.

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This article 'Effects of the ladybird beetle Micraspis discolor on yield components and grain yield of rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research repo

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28

Ganesan, K., W. W. Manuel, and T. Sundaram. "Analysis of Yield and Yield Components in Rice." International Rice Research Notes 20, no. 1 (1995): 4. https://doi.org/10.5281/zenodo.6999370.

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This article 'Analysis of Yield and Yield Components in Rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

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Zhang, X. G., and Y. K. Huang. "Effect of Seedlings Hill on Individual Rice Plant Yield and Yield Components." International Rice Research Newsletter 15, no. 4 (1990): 21–22. https://doi.org/10.5281/zenodo.7179491.

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This article 'Effect of Seedlings/Hill on Individual Rice Plant Yield and Yield Components' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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Alam, S. M. "Effect of Azolla and N on Rice Grain and Straw Yield." International Rice Research Newsletter 14, no. 6 (1989): 21. https://doi.org/10.5281/zenodo.7155988.

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This article 'Effect of Azolla and N on Rice Grain and Straw Yield' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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31

Sreekumar, S. G., V. G. Nair, and R. B. Asan. "Effect of Planting Overage Seedlings on Rice Duration, Yield, and Yield Attributes." International Rice Research Newsletter 13, no. 6 (1988): 29–30. https://doi.org/10.5281/zenodo.7146274.

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Abstract (sommario):

This article 'Effect of Planting Overage Seedlings on Rice Duration, Yield, and Yield Attributes' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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Potts, M. J., E. Biranguza, and C. Bweyo. "Evaluation of Alternative Legumes for Green Manure and Grain under African Highland Conditions." Experimental Agriculture 25, no. 1 (1989): 109–18. http://dx.doi.org/10.1017/s0014479700016495.

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SUMMARYThree species of lupin, three vetches and a soyabean were evaluated as green manures under tropical highland conditions. With moderate soil fertility and 150 days of rain, all lupin types and a locally obtained vetch gave yields of about 80 t ha−1 fresh material. Under less favourable conditions, low soil pH and high aluminium saturation, only Lupinus luteus achieved these yields. During the short season, with about 60 days of rain, the yield of L. luteus was reduced to 30 t ha−1 and establishment of the vetches was slow and they yielded poorly. Growth of soyabean was poor under cool co

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SAINI, ANKIT, SANDEEP MANUJA, SURESH KUMAR, R. G. UPADHYAY, and CHINMAYA SAHOO. "Response of tillage methods on yield of wheat (Triticum aestivum) cultivars." Indian Journal of Agricultural Sciences 95, no. 5 (2025): 589–94. https://doi.org/10.56093/ijas.v95i5.136736.

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The present experiment was conducted during winter (rabi) seasons of 2019–20 and 2020–21 at Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh, to assess the impact of tillage and farming practices on the crop yield and yield attributes of three wheat (Triticum aestivum L.) cultivars. Two-year results show that conventional tillage produced significantly higher grain yields (4,469 kg/ha), straw yields (6,257 kg/ha), and biological yields (10,726 kg/ha) than natural farming treatment, which produced lower grain yields (1,646 kg/ha), straw yields (2,597 kg

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34

Moustafa, Ehab S. A., El-Sayed E. A. El-Sobky, Hossam I. A. Farag, et al. "Sowing Date and Genotype Influence on Yield and Quality of Dual-Purpose Barley in a Salt-Affected Arid Region." Agronomy 11, no. 4 (2021): 717. http://dx.doi.org/10.3390/agronomy11040717.

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Dual-purpose barley is an alternative approach to producing high-quality forage yield plus an acceptable grain yield in marginal environments of arid regions that are characterized by lack of forage. Field experiment was performed in two consecutive growing seasons at an arid region affected by salinity in irrigation water and soil at Western Sinai Peninsula in Egypt. The study aimed to optimize sowing date and screen salt-tolerant barley genotypes that perform better in terms of forage yield and quality as well as grain and biomass yield production in salt-affected environment. Sowing dates,

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35

Stock, Duane, and T. K. Bhattacharya. "Bond yields compared to amortizing yields." Review of Quantitative Finance and Accounting 3, no. 3 (1993): 325–37. http://dx.doi.org/10.1007/bf02406995.

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36

Wadl, Phillip A., Livy H. Williams, Matthew I. Horry, and Brian K. Ward. "Evaluation of 12 Sweetpotato Clones in Coastal South Carolina for Yield and Insect Resistance Using Organic and Conventional Cultural Practices." HortTechnology 32, no. 3 (2022): 253–62. http://dx.doi.org/10.21273/horttech04979-21.

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The yield and insect resistance of 12 sweetpotato (Ipomoea batatas) clones grown in two different production systems (organic black plastic mulch and conventional bare ground) were evaluated in 2016 and 2017 in coastal South Carolina. Significant differences in total storage root yield, marketable storage root yield, U.S. No. 1 storage root yield, and percent of U.S. No. 1 storage roots in all trials were found, except for percent of U.S. No. 1 storage roots in 2017 for the organic black plastic mulch trial. In the organic black plastic mulch trials, ‘Bonita’ and USDA-04-136 consistently produ

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37

Ntare, Bonny R. "Intercropping Morphologically Different Cowpeas With Pearl Millet in a Short Season Environment in the Sahel." Experimental Agriculture 26, no. 1 (1990): 41–47. http://dx.doi.org/10.1017/s0014479700015386.

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SUMMARYThe effects on yield of varying the planting date and planting pattern of morphologically different cowpea cultivars intercropped with pearl millet were studied in two field trials. The interaction between cowpea cultivars and planting date was highly significant. There was a sharp reduction in cowpea yields with late planting. Millet yields were reduced less when sown simultaneously with early cowpea cultivars than when sown with a late maturing local cultivar. Early maturing cowpea cultivars planted in closely spaced hills had less effect on millet yields than a late maturing cultivar

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38

Morgan, C. L., R. B. Austin, Margaret A. Ford, J. Bingham, W. J. Angus, and S. Chowdhury. "An evaluation of F1 hybrid winter wheat genotypes produced using a chemical hybridizing agent." Journal of Agricultural Science 112, no. 2 (1989): 143–49. http://dx.doi.org/10.1017/s0021859600085038.

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Abstract (sommario):

SummaryIn experiments harvested in 1985 and 1986 the grain yields of 61 F1 hybrids among winter wheat varieties and advanced breeding lines were 5·9% greater than the yields of the best parents. In a trial with 430 hybrids in 1986, the hybrids yielded 3·6% more grain than the best parents. Among these 430 hybrids heterosis for yield was greatest for those from the lowest yielding parents. This result is taken to indicate that among these genotypes most genes for high yield have been fixed in the highest yielding parents.The hybrids had slightly fewer ears/m2, but more grains per ear and heavie

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39

Challinor, A. J., T. R. Wheeler, J. M. Slingo, P. Q. Craufurd, and D. I. F. Grimes. "Simulation of Crop Yields Using ERA-40: Limits to Skill and Nonstationarity in Weather–Yield Relationships." Journal of Applied Meteorology 44, no. 4 (2005): 516–31. http://dx.doi.org/10.1175/jam2212.1.

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Abstract Reanalysis data provide an excellent test bed for impacts prediction systems, because they represent an upper limit on the skill of climate models. Indian groundnut (Arachis hypogaea L.) yields have been simulated using the General Large-Area Model (GLAM) for annual crops and the European Centre for Medium-Range Weather Forecasts (ECMWF) 40-yr reanalysis (ERA-40). The ability of ERA-40 to represent the Indian summer monsoon has been examined. The ability of GLAM, when driven with daily ERA-40 data, to model both observed yields and observed relationships between subseasonal weather an

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40

Bekele, Bewket Getachew. "Review on Yield Gap Analysis: Modeling of Achievable Yields at Farm Level." European Journal of Agriculture and Forestry Research 10, no. 2 (2022): 21–27. http://dx.doi.org/10.37745/ejafr.2013/vol9n22127.

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In the present context, ‘model’ is expressed as a computer program that can be repeatedly run several times for computing several designed mathematical or statistical expressions (equations) governing crop growth-environment relations, given appropriate input data. The experiment station yields obtained under a rainfed situation without any nutrient deficiency mostly considered as the potential yields of rainfed crops. Actual yields are obtained by recording crop yields of farmers in the region under investigation and achievable yield is between actual and potential yield. Actual yields are co

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41

Tyburski, Józef, Mirosław Nowakowski, Robert Nelke, and Marcin Żurek. "Optimizing an Organic Method of Sugar Beet Cultivation and Yield Gap Decrease in Northern Poland." Agriculture 14, no. 6 (2024): 937. http://dx.doi.org/10.3390/agriculture14060937.

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Abstract (sommario):

In the period of 2016–2018, two series of field studies on organic sugar beet growing (Beta vulgaris L.) were carried out in northern Poland on Luvisol loamy soil (medium–heavy) soil in Bałcyny and Płonne. The aim of this study was to decrease the yield gap between organic and conventional beets. Factors to increase the yield of organic beet were differentiated fertilization (cattle farmyard manure (FYM), compost, and Bioilsa) and choice of varieties (Eliska, Jampol, and Sobieski). The reference point was the conventional cultivation of the same sugar beet varieties, fertilized with manure and

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42

Hannah, MC, and GJ O'Leary. "Wheat yield response to rainfall in a long-term multi-rotation experiment in the Victorian Wimmera." Australian Journal of Experimental Agriculture 35, no. 7 (1995): 951. http://dx.doi.org/10.1071/ea9950951.

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Abstract (sommario):

Seventy-six years of wheat yield data from a long-term rotation experiment at Dooen in the Victorian Wimmera were analysed to describe the response of wheat yield to seasonal rainfall, crop sequence, and time. Wheat yields from 7 different 1- to 4-course rotations involving wheat, barley, oat, field pea, grass pasture and fallow were compared as a function of growing-season (May-November) rainfall. The field layout had no within-year replication, but each phase of each rotation was represented once in each year. An approximate quadratic response of wheat yield to both current year and previous

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43

Dahniya, M. T., S. K. Hahn, and C. O. Oputa. "Effect of Shoot Removal on Shoot and Root Yields of Sweet Potato." Experimental Agriculture 21, no. 2 (1985): 183–86. http://dx.doi.org/10.1017/s0014479700012461.

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Abstract (sommario):

SUMMARYExperiments on harvesting sweet potato as a green vegetable and as a root crop are described. Whole shoots yielded 62% more than shoot tips. Similar total shoot yields were harvested whether tip removal was at two, three or four week intervals. Root yield was decreased by 31 to 48% by removing shoot tips, while removing whole shoots led to root yield decreases of 48 to 62%. Harvesting shoots at two week intervals gave 72% reduction in root yield, compared with 50% with four week intervals. There were fewer and smaller tubers as the frequency of shoot harvests increased. There were varie

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44

Rayburn, Edward B., and Tom Basden. "Comparison of Crop Yield Estimates Obtained from an Historic Expert System to the Physical Characteristics of the Soil Components—A Project Report." Agronomy 12, no. 4 (2022): 765. http://dx.doi.org/10.3390/agronomy12040765.

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Abstract (sommario):

Crop yields vary due to soil type. Expected crop yields are reported in published soil surveys based on the knowledge of local conservation and extension professionals. Crop yields have increased over the years due to improved genetics and management. The objective of this project was to compare historic expected crop yields to soil physical characteristics and to update expected yields for West Virginia soils in the United States National Soils Information System (NASIS). Regression analysis found that soil physical characteristics explained 57 to 65% of the variation in corn and hay yields.

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45

Florence, Wairimu Ndungu, Kagiki Njogu Martin, and Kingori Gathungu Geoffrey. "Analysis of socioeconomic characteristics on coffee yield gap among smallholder farmers in Nyeri Central sub-county, Kenya." World Journal of Advanced Research and Reviews 23, no. 3 (2024): 2304–11. https://doi.org/10.5281/zenodo.14964663.

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Abstract (sommario):

Kenya’s coffee production has been declining over the years leading to decreased yields and making it hard for farmers to benefit from the sector. This has resulted in a considerable yield difference, with actual farmer yields far below the potential yields of station trials. This large yield gap reveals an enormous potential for yield improvement in coffee production. However, the large yield gap may be attributed to several factors, yet there is limited quantitative information on site-specific factors and the yield gap attributed to the factors. This study informs the knowledge gap by

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46

Raza, Sohail, and Shahzad Munir. "The Impact of U.S. Quantitative Easing (QE) Announcements on Indian Government Bond Yields." Asian Journal of Economics, Business and Accounting 23, no. 19 (2023): 179–206. http://dx.doi.org/10.9734/ajeba/2023/v23i191083.

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Abstract (sommario):

This study investigates the impact of U.S. Quantitative Easing (QE) announcements on Indian Treasury yields. Two outstanding channels of spillover effects on bond yields documented in the existing literature are signalingchannel and portfolio balance channel. This study decomposes Indian Treasury yields into yield expectationsand risk premia to measure spillover effects of U.S. QE announcements. The impact on yield expectationmeasures signaling effect while the impact on risk premia measures portfolio balance effect. It is observed that FOMC announcements of Federal Reserve’s Quantitative Easi

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47

Rashwan, Emad, Ahmed Mousa, Ayman EL-Sabagh, and Celaleddin Barutçular. "Yield and Quality Traits of Some Flax Cultivars as Influenced by Different Irrigation Intervals." Journal of Agricultural Science 8, no. 10 (2016): 226. http://dx.doi.org/10.5539/jas.v8n10p226.

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Abstract (sommario):

<p>Flax is a potential winter crop for Egypt that can be grown for both seed and fiber. The study was conducted during two successive winter seasons of 2013/14 and 2014/15 in the experimental farm of El-Gemmeiza Agricultural Research Station, Agriculture Research Centre, Egypt. The objective of this work was to evaluate the effect of irrigation intervals (25, 35 and 45) on the straw, seed, oil, fiber yields and quality of flax cultivars (Sakha1, Giza9 and Giza10). Irrigation intervals significantly influenced all studied traits except oil percentage. Irrigated flax plants every 35 days g

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48

Hodges, Laurie, Douglas C. Sanders, Katharine B. Perry, et al. "Adaptability and Reliability of Yield for Four Bell Pepper Cultivars Across Three Southeastern States." HortScience 30, no. 6 (1995): 1205–10. http://dx.doi.org/10.21273/hortsci.30.6.1205.

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Abstract (sommario):

Four bell pepper (Capsicum annuum L.) cultivars were evaluated for yield (total weight of marketable fruit) performance over 41 environments as combinations of 3 years, three planting dates, and seven locations across North Carolina, South Carolina, and Georgia. Cultural practices, including trickle irrigation and double rows planted on black-plastic-covered beds, were uniform across all environments, except for fertilization, which was adjusted at each location based on soil tests. Comparing production over 3 years between the mountain location and the Coastal Plain location in North Carolina

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49

Abayomi Olakojo, Solomon, and Olaronke Toyin Onanuga. "Effects of Climate Change on the Long-run Crops’ Yields in Nigeria." International Journal on Food System Dynamics 11, no. 3 (2020): 270–96. https://doi.org/10.18461/ijfsd.v11i3.54.

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Abstract (sommario):

The study investigated the impact of climate change on yields of leading food crops in Nigeria and assessed the transmission channels of climate shocks to welfare. Long-run causality test, Markov-switching regression and Structural Vector Autoregressive (SVAR) model were used. Long-run causality between climate change and crop yields was not rejected. A rise in temperature by 1% reduces crop yields by -0.12% in the regime of high yield while 1% increase in rainfall increases yields by 0.21% and 0.26%, respectively in high and low yield period. Shocks to welfare is traceable to climate change v

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50

Qiao, Shengchao, Han Wang, I. Colin Prentice, and Sandy P. Harrison. "Optimality-based modelling of climate impacts on global potential wheat yield." Environmental Research Letters 16, no. 11 (2021): 114013. http://dx.doi.org/10.1088/1748-9326/ac2e38.

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Abstract (sommario):

Abstract Evaluation of potential crop yields is important for global food security assessment because it represents the biophysical ‘ceiling’ determined by variety, climate and ambient CO2. Statistical approaches have limitations when assessing future potential yields, while large differences between results obtained using process-based models reflect uncertainties in model parameterisations. Here we simulate the potential yield of wheat across the present-day wheat-growing areas, using a new global model that couples a parameter-sparse, optimality-based representation of gross primary product

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