Download or read book The effects of daylength and temperature on the growth development and yield of eight soybean Glycine max L Merr cultivars in the Natal midlands written by Robert Fisher and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Daylength and Temperature on Development of Soybeans Glycine Max L Merrill written by David John Major and published by . This book was released on 1974 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Predicting Soybean Glycine Max L Merr Phenology Using Temperature and Daylength written by Nathaniel Wesley Waldie Ort and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean [Glycine max (L.) Merr.] phenology in response to Manitoba's (MB) environment is less understood than in long-established soybean production regions of North America like Ontario (ON) or the United States of America. The goal of this research is to fill this gap in knowledge. Soybean cultivars varying in maturity classification were grown in MB and ON from 2008 to 2010, and again in 2017 and 2018. Ontario represented a traditional short-season soybean production region of Canada, while MB represented a new, short-season prairie environment. Early maturing cultivars were selected to represent a range of maturity groups (MG) from 000 to 1.3. Dates of development stages from emergence (VE), beginning bloom (R1), beginning seed (R5) and full maturity (R8) were recorded following the Fehr et al. (1971) soybean development stage descriptions. Phenology data from the field experiments were used to develop two growth stage models, and a controlled environment experiment was conducted in growth chambers to isolate potential delaying effects long photoperiods had on time from VE to R1. In the field experiment, phenology differences between MG became prominent at R5, with later MG requiring more time than earlier MG. Soybean grown in MB spent 42 d in vegetative development and 59 d in reproductive development, while in ON soybean spent 25 and 70 d in the same development periods, respectively. In the modelling experiment, predictive equations with greatest accuracy in comparison to the growing degree day and crop heat unit were proposed as a new 'Growth Stage Interval Unit' (GSIU) and a 'Photothermal Unit' (PTU). The GSIU model was superior in growth stage predicting accuracy over the PTU; however, because the PTU is less cumbersome it is more likely to be adopted by farmers and agronomists. In the controlled environment experiment, more time was required to reach R1 under longer photoperiods for all cultivars tested, and later rated MG had greater sensitivity to photoperiod than earlier MG.

Download or read book Effect of Day Length and Temperature on Development of Soybean Glycine Max L Merrill written by David John Major and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Review of the Effect of Daylength and Temperature on Development of Soybeans Glycine Max L Merrill written by D. J. (David John) Major and published by Lethbridge, Alta. : Agriculture Canada Research Station. This book was released on 1977 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature Effects on Soybean Growth Development Physiology Yield and Seed Quality written by Firas Ahmed Alsajri and published by . This book was released on 2018 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperature is a major factor affecting plant growth and development at all stages. The objectives of this study were to investigate the temperature effects on all aspects of soybean growth and development. Five experiments were conducted at a wide range of temperatures under optimum water and nutrient conditions at specific growth stages. Two cultivars, Asgrow AG5332 (AG) and Progeny P5333RY (PR) from MG V with different growth habits, were used. All studies except the seed germination were conducted in sunlit plant growth chambers under optimum water and nutrient conditions. The seed germination experiment was conducted in a temperature-controlled incubator. Germination traits were measured during seed germination studies. In other experiments, plant growth, developmental rates, gas exchange parameters, and seed yield and quality were measured. Cultivars did not differ for seed germination and emergence traits. Quadratic functions best described time to 50% germination seed germination and emergence rates. The three cardinal temperatures for seed germination were 8.56°C (base) 27. 96°C (optimum) and 46.92°C (maximum). The base and optimum temperature for seed emergence were 10.6 and 36.7°C, respectively. During the early-season, 0-21 days, root and shoot growth parameters responded similar temperature responses, the root traits have a lower optimum (29.91°C) than the shoot parameters (36.56°C). Cultivars varied in their response to temperature during vegetative development, particularly for growth parameters, and the temperature optimums for various parameters. Node addition rate was not different among the cultivars but increased with increase in temperature. The flowering time (R1) from emergence showed quadratic trends with an increase in temperature up to 28°C and increased slightly at the higher temperatures. The PR cultivar, on an average, took 15 additional days to reach flowering compared AG cultivar across temperatures. Pod and seed yield and individual seed weight and harvest indices showed quadratic trends with maximum values at 25.82 °C for AG and 23.36 °C for PR. The functional algorithms could be helpful for management and in improving crop models..

Download or read book Day and Night Temperature Effects on Soybean Glycine Max Merr Seed Yield Seed Quality and Seed Composition written by Lance R. Gibson and published by . This book was released on 1992 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Planting Dates on Growth Yield and Quality of Soybean Glycine Max L Merrill Varieties Viz Clark 63 and Bragg written by Nangare B S. and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1992-06 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soybean Glycine Max L Merr Growth and Yield in Response to Blending Cultivars and Soil water Adjustment written by Percy Chisanga Simwanza and published by . This book was released on 1992 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Planting Date and Spacing Between Rows on Yield and Yield Components of Six Soybean Glycine Max L Merr Cultivars Grown in 1973 at the University of Wisconsin Rieder Farm written by Mehmet Ozel Ergen and published by . This book was released on 1974 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature Stress Effects on Growth and Nitrogen Assimilation of Soybean Glycine Max L Merr Seedlings written by Antonio Celso Novaes Magalhaes and published by . This book was released on 1973 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Planting Dates on Growth Yield and Quality of Two Soybean Glycine Max L Merrill Varieties Viz Clark 63 and Bragg written by Tuse B P. and published by . This book was released on 1972 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Day Length on Associations Between Seed Yield and Developmental Traits in Soybeans Glycine Max L Merril written by M. G. Teixeira and published by . This book was released on 1977 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine associations between various morphological and developmental characters and yield of 12 soybean genotypes when planted on june 1 and also to determine the extent to which these same charaters could be used to predict the yield of soybeans planted July 26. The July 26 planting date was chosen to simulate June 1 day lengths at about 200 N latitude. The same 12 genotypes, chosen to represent a wide renge in latitude adaptation, were replicated three in four-or six-row plots in three Planting Treatments (PT) designated A, B, and C. PT A was planted 1 in 90-cm rows; PTS B and C were planted July 26 in 90-and 60-cm rows, respectively. Characters on which data were collectyed were seven time sequence variables, eight stem development variables, and nine miscellaneous variables. Analyses of variance showed significant differences among cultivars for nearly all characters measured in each planting treatment. All time sequence variables were negatively correlated with yield in PT .This suggests that the growing season for many of the 12 genotypes was longer than was needed for maximum yield. In a stepwise regression model, days to beginning flower, days to beginning seed enlargement, days to maturity, and number of days flowering were assaciated wich 86 of the yield variability in PT a. However, data on these variables, measured in PT A were associated with 34 of the yield varialility in PT B. Adding more variables did not significantly increase R2 values. In Pt C, planted in 60 cm rows on July 26, 64% of the yield variability was associated with the following PT A variables: days to first pods 4 cm long. In stewise regression models dealing wich stem variables measured in PT A, three variables were associated wich 87 % of the yield variability of PT A, three were associated with 72% of the yield variability in PT C. Adding additional variables in PT B and incresed R2 values very little. Three miscellaneous variables measured in PT A were associated with 90% of the yield variability in PT A, five were associated with 72% of the yield variability in PT B and three were associated with 65% of the yield variability in PT C. Some variables were negatively associated with yield PT A, but positively associated in PT B or C. The row with differences in PT B and C significantly influenced the extent to which some variables in PT A were associated with yield in B or C. The results indicate that measurements made on early planted soybeans may be used effectively in selecting for yield in later plantings or in selecting for a higher yield potential at lower latitudes.

Download or read book Some Effects of Temperature on Germination of Soybeans Glycine Max L Merrill as Related to Cultivar and Reed Vigor written by Carl Wayne Jordon and published by . This book was released on 1975 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Seeding Rate Row Spacing Cultivar and Stage of Plant Development at Harvest on Yield and Quality of Soybean Glycine Max L Merr Forage written by Hilliard Gregory Harvey and published by . This book was released on 1980 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Temperature on Germination and Growth of Several Cultivars of Soybean Glycine Max L Merrill written by Daniel Joseph Matthews and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: