Download or read book I Effect of Nitrogen Rate on Plant Nitrogen Loss in Winter Wheat Varieties Glutamine Synthetase Activity in Winter Wheat Varieties Effect of Nitrogen Fertilization and Cation Removal on Soil PH written by Fred Kaburu Kanampiu and published by . This book was released on 1995 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Planting Rates and Nitrogen Levels on Winter Wheat Varieties with Different Morphological Characteristics written by Johnny Wryas Pendleton and published by . This book was released on 1955 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accumulation and Distribution of Nitrogen in Four Winter Wheat Cultivars written by Geoffrey M. Heinrich and published by . This book was released on 1979 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Nitrogen on the Yield and Quality in Winter Wheat written by Rodolfo Moreno Dahme and published by . This book was released on 1948 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Rates of Nitrogen and Dates of Planting on Winter Wheat Varieties in the Columbia Basin written by Laurn Kemp Beutler and published by . This book was released on 1961 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Nitrogen Fertilizer on Yield and Protein Content of Winter Wheat in Utah written by Howard Boyd Peterson and published by . This book was released on 1952 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Varietal Differences in Response of Winter Wheat Varieties to Nitrogen Fertilizer and Environment written by John Richard Ambler and published by . This book was released on 1976 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to evaluate differences between winter wheat varieties in response to nitrogen fertilizer. Seven nitrogen fertilizer rate x variety factorial experiments were conducted in several environments. Dry matter and nitrogen yields at boot, soft dough, and harvest and grain yield components were measured. The yield component data were evaluated in terms of storage capacity which is assumed to be proportional to kernels /rn2 for a given variety. The kernels /m2 was divided into two components, spikes /rn2 and kernels/spike. The spikes /m2 of each variety were closely related to the boot nitrogen yield, but not to boot dry matter yield or plant nitrogen content. Since the kernels/spike generally remained constant or increased as the boot nitrogen yield increased, the kernels/m2 appeared to depend on the boot nitrogen yield. The variety Hyslop had high dry matter and nitrogen yields at boot stage of growth. This appears to allow it to have excellent storage capacity as measured by kernels /m2 . Good growth by boot stage appears to lower the nitrogen fertilizer rate needed for maximum grain yields. The variety Nugaines had relatively low growth and nitrogen uptake by boot. This may be the reason why it needs a higher fertilizer rate than Hyslop to obtain adequate storage capacity (kernels/m2). However; Nugaines had better growth after soft dough stage. At the dryland locations this may be due to slower depletion of the soil water. At the irrigated locations it may be due to greater late tillering. Hyslop and Nugaines differed in the pattern of yield component adjustment to improving environment. Hyslop mainly increased its average kernels/spike rather than spikes/m2 . Nugaines had greater increases in spikes/m2 but smaller increases in kernels/spike. This may be related to their different cuim sizes and tillering. Hyslop forms a few large culms early in the season, but Nugaines continues to tiller during stem elongation. Coulee was intermediate between Hyslop and Nugaines in patterns of growth over time and pattern of yield component adjustment to improving environment. It had good yields at moderate nitrogen rates, and high nitrogen rates did not appear to be needed for adequate storage capacity. Wanser consistently had low grain yields, which was due to low kernels/m2 . Nitrogen fertilizer increased its height more than the shorter varieties and this was associated with reductions in kernels/spike: Thus the height growth of Wanser may compete with its ear development and cause poor storage capacity. Wanser had slightly greater grain nitrogen percentage than other varieties, but this was simply associated with its low grain yield. There were only small varietal differences in the percentage of plant nitrogen translocated to grain. However, environment and nitrogen fertilizer rate greatly affected this. The club wheat Paha yielded well but usually less than some other varieties. It had high dry matter and nitrogen yields, but after soft dough its dry matter yields decreased more than for other varieties. This indicated that it depleted soil moisture earlier than other varieties did. Tx65A1268, a short hard red winter wheat with prolific tillering and small culms, was included in. two experiments. It had the highest grain yield at the low rainfall site. This may be related to its early maturity. However, with irrigation it yielded poorly. This appeared to be due to poor storage capacity since there was no increase in kernels/spike with improving environment. Yamhill, an awnletted wheat, yielded well in the Willamette Valley, but not in eastern Oregon. Estimates of the recovery of fertilizer nitrogen were calculated from the increases in soft dough nitrogen yield caused by each increment of nitrogen fertilizer. At sites with excellent moisture supply the first fertilizer increment was incompletely recovered (44-66%), apparently due to immobilization associated with plant residue decay. With higher fertilizer increments which increased yields, fertilizer recovery values were near 100%. At low rainfall sites under fallow cropping recovery values were 38-56% and decreased with above optimum fertilizer rates. At eastern Oregon sites losses of nitrogen from the plant tops after soft dough ranged from 7-33% depending on variety, location, and fertilizer rate. At maturity the percentage of the total plant top nitrogen in the grain ranged from 60-81%. This percentage decreased with nitrogen fertilization, but was little affected by variety.
Download or read book Nitrogen Uptake by Wheat as Affected by Soil Type Time and Rate of Fertilizer Application written by Allan Wayne Cattanach and published by . This book was released on 1981 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Nitrogen Rate Method of Application and Residue Management on Estimated N Loss in Winter Wheat written by Jeffrey Bryant Ball and published by . This book was released on 1995 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Timing and Placement Effects on Grain and Plant Nitrogen and Grain Yield in Hard Red Winter Wheat written by Mylen G. Bohle and published by . This book was released on 1989 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard red winter wheat has the potential to be an alternative crop in the Pacific Northwest, however percent grain nitrogen has been unacceptably low and grain yields have been about only 80% of soft white winter wheat. During the late spring and the summer months there is usually little rainfall, therefore moisture and nitrogen needed for grain fill must be taken up from the subsoil. The interaction between rainfall distribution and available nitrogen and moisture at different depths in the soil during grain fill was thought to be the problem for low percent grain nitrogen in this mediterranean climate. Dryland field experiments were conducted with the hard red winter wheat cultivar Nanser' at the Sherman Branch Expeilment Station at Moro, north-central Oregon, during the crop years 1983 and 1984. Plots were fall-fertilized with 0 (low N) and 80 (high N) kg/ha of nitrogen fertilizer and 0 and 20 kg/ha of phosphorus fertilizer. At jointing and at anthesis, 0 and 20 kg/ha of nitrogen fertilizer were applied with water, to the 0, 60 and 120 cm soil depths to determine the effects upon percent grain nitrogen, grain yield, plant nitrogen yield and nitrogen harvest index (NHI) at harvest. The 80 kg/ha fall-applied N rate was the factor most responsible for increasing percent grain nitrogen and grain nitrogen yield. Grain yield was increased only in 1984. Under low N fertility conditions, percent grain nitrogen was increased by the 20 kg/ha N rate applied at anthesis in 1983. Grain yield was increased with the 20 kg/ha N rate applied at jointing, both years, and was limited if phosphorus fertilizer was not present with the anthesis timing in 1983. Grain nitrogen yield was increased by P fertilizer and the 20 N rate (regardless of timing) in 1983, and when N was applied at jointing in 1984. Under high N fertility conditions, 20 N rate applied at jointing increased percent grain N both years, and grain nitrogen yield in 1983. Grain yield was not increased. In general, percent grain N in the high N fertility plots and the 1984 low N fertility plots was positively correlated to the nitrogen yield of all the plant parts, except chaff in 1984. Percent grain N was negatively correlated to grain NHI under high N fertility conditions, but positively correlated under 1983 low N conditions. Percent grain N was positively correlated to most other plant parts' NHI under high N fertility conditions in 1983 and 1984 and 1984 low N fertility conditions. Under low N fertility conditions in 1983, percent grain N was positively correlated to grain NHI. Deep placement did not significantly increase percent grain N, grain yield or grain nitrogen yield. Under high N fertility conditions in 1984, more nitrogen remained in some of the straw plant parts at the 60 cm depth with the anthesis timing compared to jointing.
Download or read book Nitrogen Fertilization of Winter Wheat in New York State written by Rodolfo Moreno Dahme and published by . This book was released on 1951 with total page 326 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 1992-10 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Available Nitrogen on the Protein Content and Yield of Wheat written by Ray E. Neidig and published by . This book was released on 1922 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Use Efficiency and Nitrogen Response of Wheat Varieties Commonly Grown in the Great Plains USA written by Nathaniel D. Dorsey and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing nitrogen use efficiency (NUE) and nitrogen response in winter wheat could help producers reduce input costs associated with nitrogen fertilizers and decrease the negative environmental impacts of N loss. The objectives of this research were to i) establish if there are genetic differences in NUE and other related parameters among wheat varieties commonly grown in the Great Plains, ii) determine if there are differences in N response among select varieties with a range of NUEs, and iii) determine if NUE influences N response. This information could be useful in future breeding efforts as researchers seek to develop more efficient varieties. This was approached by conducting two separate studies, a large NUE study with 25 winter wheat varieties, and a smaller N Rate study with 4 varieties that represented a range of NUEs based on the preliminary results of the NUE study. The NUE study was conducted over the course of several seasons and locations, with treatments of consisting of N Rate and variety. The experiment was laid out in a strip-plot design and replicated four times at each location. In the 2010-11 and 2011-12 seasons it was planted at the Kansas River Valley Experiment Field in Rossville, KS. In the 2012-13 season the experiment was planted at two locations, one at Silverlake and another at Ashland Bottoms, KS. The experiment was again planted at two locations in the fall of 2013, in Ashland Bottoms, KS, and Hutchinson, KS. The wheat varieties were grown with two N rates, 0 kg N ha−1 and 90 kg N ha−1. Nitrogen use efficiency was calculated as the grain yield per unit of available nitrogen (sum of soil N and fertilizer N) and ranged from 22-30 kg of grain per kg of N and was strongly influenced by variety with a p
Download or read book Effect of Amount and Timing of Nitrogen Fertilization on the Yield and Protein Content of Four Soft Red Winter Wheat Cultivars written by Bahman Eghball and published by . This book was released on 1981 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Soil Nitrogen Availability on Nitrogen Uptake and Translocation in Three Winter Wheat Varieties Differing in Grain Protein Potential written by Kenneth Darrell Wilhelmi and published by . This book was released on 1976 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
