Download or read book Photoperiod Vernalization and Seeding Rate Effects on Anthesis Date and Agronomic Performance of Winter Wheat Triticum Aestivum L written by Mehmet Atak and published by . This book was released on 1997 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Seeding Rates and Seeding Dates on Agronomic Characteristics of Spring Wheat Triticum Aestivum L Genotypes written by Attinaw Aytenfisu and published by . This book was released on 1977 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Seeding Rates and Seeding Dates on Agronomic Characteristics of Spring Wheat Triticum Aestivum L Genotypes written by Attinaw Aytenfisu and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Winter Wheat Performance as Influenced by Seeding Dates and Rates and the Impact of Seed Treatment written by Brian J. Dahlke and published by . This book was released on 1991 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature Planting Depth and Genotype Effects on Seedling Characteristics and Seeding Rate Effects on Agronomic and Quality Performance of Winter Wheat Triticum Aestivum L written by Bekele G. Abeyo and published by . This book was released on 2000 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Vernalization and Photoperiod on Soft Red Winter Wheat Cultivars Triticum Aestivum L in Northeast Texas written by Robert Gaston and published by . This book was released on 1998 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Tillage System Grazing and Seeding Date on Grain Yield of Hard Red Winter Wheat Triticum Aestivum and Effect of Production Objective and Tillage System on Forage Production written by Deena Leigh Morley and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vernalization Response and Its Implication in Wheat Triticum Aestivum L written by ShiYing Wang and published by . This book was released on 1995 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CHARACTERIZATION of VERNALIZATION and PHOTOPERIOD RESPONSE GENES in HIGH LATITUDE WINTER WHEAT TRITICUM AESTIVUM L written by Alexander Whittal and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In wheat (Triticum aestivum L.), major determinants of plant phenology are physiological responses to vernalization temperature, and day length (photoperiod), conditioned by VRN and the PPD genes, respectively. The objectives of this research were to characterize the allelic variation at the major VRN and PPD loci in a diverse panel of winter wheat genotypes (n = 208) and to associate the allelic variation with phenologic, agronomic and adaptation traits. The panel was genotyped using allele-specific markers of the major VRN and PPD loci; VRN-A1, VRN-B1, VRN-D1, VRN-B3, PPD-A1, PPD-B1, and PPD-D1. The photoperiod-sensitive alleles Ppd-D1b and Ppd-A1b were present in 127 and 166 genotypes, respectively. Genotypes with different alleles at PPD-D1 and PPD-A1 varied for number of days to booting, heading, anthesis, and maturity as well as, height and yield. Variation at the VRN loci was minimal. Genotypes with photoperiod-insensitive alleles had higher stability for days to anthesis, than photoperiod-sensitive genotypes.

Download or read book Analysis of Historical Winter Wheat Triticum Aestivum L Planting Date and Seeding Rate Studies in Kansas written by Zhijie Jin and published by . This book was released on 1997 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Seeding Rate and Planting Date Upon Dryland Winter Wheat Yields on the High Plains of New Mexico written by New Mexico State University. Agricultural Experiment Station and published by . This book was released on 1968 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physical Characteristics and Agronomic Impacts of Winter Wheat Triticum Aestivum L Root Restrictive Soils in the Palouse written by Rachel Sarah Breslauer and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Exposed compacted subsoils pose a risk to sustained dryland winter wheat (Triticum aestivum L.) production in the in the Palouse agricultural region. Compacted, high bulk density soils can restrict root density in subsoils thereby decreasing crop water and nitrogen uptake and reducing crop performance. Root restriction and its effects on winter wheat agronomics were examined over the course of two field-scale on-farm studies in eastern Washington and northern Idaho. The first study aimed to understand: current within-field spatial variability of root restrictive depth (RRD), soil bulk density effects on root restriction, and root restriction effects on crop water uptake. At harvest in 2018, soil profiles in two fields were sampled to 120 cm depth at 15 cm increments were collected to measure soil bulk density, root density, and crop water use at depth. Results showed that within-field RRD varied (>120 - 75 cm), root density decreased with increasing bulk density, and soil water content at harvest increased as root density decreased. The second study evaluated the effect of subsoil compaction and water uptake on crop agronomics and nitrogen (N) use in eight site-years from 2016-2018. Soil samples from 0-120 cm depth and associated plant samples were collected at harvest to measure soil bulk density, N and water use, crop yield, and grain protein concentration. The yield gap between potential and realized yield was calculated from water in the top 120 cm of the soil profile after harvest. Results showed that compaction in the top 75 cm of the soil profile negatively affected grain and biomass yield by reducing crop extraction of deep soil water. Mean yield gaps for each field were high (352-1775 kg ha-1). Assuming that university fertilizer recommendations were used (0.045 kg N per kg yield goal), 15-76 kg N ha-1 was unused by the crop due to the yield gap. This assumption is consistent with our observations in 2018 where profile water content and residual nitrate-N in the subsoil were positively correlated. Tools are needed to help identify and adjust yield goals for root restriction to prevent over-application of N in affected field areas.

Download or read book Effect of Genotype Environment and Production Packages on Yield Agronomic Characteristics and End Use Quality of Winter Wheat written by Madhav Bhatta and published by . This book was released on 2015 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain yield and end-use quality are the most important characteristics for hard red winter wheat (Triticum aestivium L.). Improvement of grain quality characteristics of grain from a given growing season and location requires systematic understanding of the genotype chosen, the production environment, and also knowing the consequence of rate and time of individual production packages such as seed treatment, seed rate, nitrogen (N) fertilization, and foliar fungicide applications. The objectives of this study were to: identify the effects of seed rate, genotype, and N top-dressed on yield, agronomic characteristics, and end-use quality of winter wheat; and to determine the effects of seed treatment and flag leaf foliar fungicide application on yield and agronomic characteristics of wheat cultivars. Two experiments were conducted at Havelock, near Lincoln, NE and the High Plains Agricultural Lab (HPAL), near Sidney, NE in 2014 and 2015 using randomized complete block design with split factorial arrangement. Overall foliar N increased grain yield, grain protein concentration, other baking quality indicators such as flour water absorption, peak height, tail area, weakening slope, and depressed grain volume weight, mixing time, and tolerance. Similarly, increased seed rate improved grain yield, seed weight, grain volume weight, flour yield, mixing time, and mixing tolerance. Increased seed rate reduced grain protein, flour water absorption, tail area, peak height, and weakening slope. Seed treated with EverGol Energy and Gaucho showed improved seedling emergence, leaf greenness, grain yield, and seed weight. Application of foliar fungicide at flag leaf stage improved grain yield, seed weight, and leaf area. Among the six genotypes evaluated, ‘Settler CL’ and ‘Freeman’ had the highest overall grain yield. The study demonstrated the importance of seeding rate and the existence of a wider than expected tolerance range for seeding rate. The study also demonstrated the importance of in-season nitrogen top dress and foliar fungicide application to increased winter wheat grain yield and grain quality in Nebraska. However, further research is recommended to fine-tune the factors and interdependence of response in relation to a specific location, season or the prevailing weather condition, and the specific attribute of the genotype seeded.

Download or read book Effects of Temperature Photoperiod and Vernalization on the Growth Development and Predictions by the CERES wheat Model for Spring Wheat Cultivars written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Organizations such as the Canadian Wheat Board rely on yield forecasts to plan grain handling and marketing strategies. Therefore, a model that accurately predicts yield would be useful. In plant breeding programmes involving advanced line evaluations at different locations, lack of adequate resources may be a limitation. Differences among genotypes at different locations are due to genetic as well as environmental effects. These studies investigated the effects of temperature, photoperiod, and vernalization on the growth and development of spring wheat cultivars, and assessed the ability of the CERES-wheat model to predict yield in yield trials conducted in western Canada. Field experiments were conducted at Winnipeg and Carman, Manitoba, using three seeding dates at each location, to provide data for model calibration and validation. Controlled environment studies elucidated environmental effects which may be difficult to discern under field conditions. Da a on phenology, yield-related components, weather, and model-required soil properties were collected for all trials. High temperatures accelerated the growth of vernalization-insensitive cultivars by decreasing time to anthesis and time to maturity, and reduced the number of main stem leaves and yield-related components. High temperatures decelerated the growth of vernalizafion-sensitive cultivars and prolonged the length of the vegetative growth period. Differential cultivar phyllochron responses to temperature increases were evident. Therefore, the use of modified thermal time calculations in the CERES-wheat model may not be appropriate for all genotypes. To reduce errors in phyllochron interval calculations, crop modellers may need new equations to address temperature sensitivity of cultivars. Cultivar differences in time to heading, anthesis, and maturity, were attributable to differences in the time to terminal spikelet initiation. The CERES-wheat model was sensitive to changes in seeding date and locations.

Download or read book Row Spacing Seeding Rate and Planting Date Effects on Yield and Yield Components of Soft Red Winter Wheat Triticum Aestivum L written by K. D. S. Mervyn Joseph and published by . This book was released on 1984 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Durum Wheat Breeding written by Conxita Royo and published by CRC Press. This book was released on 2005-11-07 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: Is your knowledge about this important grain crop up to date? This comprehensive two-volume resource reviews the latest advances in scientific and technical knowledge for durum wheat breeding. With a scope of coverage that includes genetics and molecular biology, plant and crop physiology, and breeding strategies and methodology, Dur