Download or read book Exploring Cultivar Response of Soft White Winter Wheat to Nitrogen and Seeding Rates and on Farm Testing of Variable Rate Seeding written by Cole W. Senefsky and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Production of high yielding soft white winter wheat is dependent on synthetic fertilizer. In addition to using variable rate technology for nitrogen application, there is interest in further refining nitrogen use to more efficiently use this expensive input as well as exploring precision technology for other inputs such as seeding rate. In Northern Idaho, trials were established to examine the response of soft white winter wheat cultivars to nitrogen and seeding rates. An additional field trial was planted on the Camas Prairie to study applying variable rate seeding technology within three distinctive production zones. While there were differences among the cultivars, environment and seasonal variation had a significant impact on how cultivars respond to nitrogen and seeding rates. The variable rate seeding trial demonstrated that this technology may be feasible, but further exploration will be necessary to develop a suitable strategy for implementation in diverse environments.

Download or read book Response of Six Varieties of Soft Red Winter Wheat to Nitrogen Levels and Seeding Rates written by Gerry Lynn Posler and published by . This book was released on 1966 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Five Winter Wheat Cultivars to Three Seeding Rates and Six Planting Dates written by Stephen William Barrett and published by . This book was released on 1979 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growing Winter Wheat on the Great Plains written by Ellery Channing Chilcott and published by . This book was released on 1917 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Limited rainfall is the controlling factor in crop production in the Great Plains. The average yields of a series of years can be foretold from the records of past years; but because the rainfall is fluctuating in amount and uncertain in distribution, the yields of a simple year can not be foretold with any certainty. The chances of success are, however, much better when the soil is wet to a considerable depth at seeding time than they are when the soil contains little or no available water at that time. The relation between the amount of water in the soil at seeding time and the yield is much closer with winter wheat than with other crops. This crop should, therefore, be seeded on the best-prepared land and that in which the greatest amount of water is stored. Except in the southern section, the response of winter wheat to summer tillage is greater than that of any other crop. Summer-tilled land should be seeded to winter wheat wherever this crop can be grown. The growth of corn is one of the best preparations for winter wheat, especially north of Kansas. With increase in the length of season and the time between harvest and seeding, there is an increase in the value of early preparation for winter wheat. In the northern section the crop can be replaced with spring wheat without serious loss. In the central section winter wheat has a greater advantage over spring wheat and can not be replaced by the latter without serious loss. In the southern section, winter wheat is less certain and less productive than farther north and can not be replaced by spring wheat. It is, however, profitably raised under favorable conditions of oil, season, and preparation. In this section particularly it should be recognized that the chances of producing a crop are low when it is seeded on land that does not contain water enough in storage to wet the soil to a depth of 3 feet."--Page 2

Download or read book Rates and Dates of Seeding Irrigated Winter Wheat Under Two Nitrogen Levels written by and published by . This book was released on 1974 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Four Winter Wheat Cultivars to Six Planting Dates and Four Seeding Rates written by Yousif Adam Hormis and published by . This book was released on 1984 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Winter Wheat Seedings written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluating Field Production Issues by Investigating Grain Dormancy and Plant Segregation Patterns in Soft White Winter Wheat written by Christy A. McCarthy and published by . This book was released on 2016 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat (Triticum aestivum) is a highly valuable crop that makes up a large portion of the world’s food. However, breeding for improved varieties with desirable characteristics can be a challenge. This research examined two different issues wheat breeders deal with throughout the selection process all the way to production of Certified seed. The first study examined how 39 cultivars as well as 6 experimental crosses differ in grain dormancy expression. In order to see if dormancy has been systematically bred out of soft white winter wheat, the release date of the cultivars used in this trial ranged from 1948 to 2012. The second study investigated the source of phenotypic variation that appeared in Foundation seed fields of the recently released variety Bobtail. Bobtail was bred to be a semi-dwarf awnletted wheat that was superior in productivity and disease resistance. Plants of Bobtail were observed to segregate for awned and awnless phenotypes which also varied in plant height. Since there was variation in plant phenotypes observed in the Foundation seed field, it was important to determine what was causing the plant segregation. The first study was conducted over the course of two years and in the first year was only planted at Corvallis, OR, while second year trials were planted at Corvallis, OR as well as Pendleton, OR. To investigate how varieties differed in dormancy expression, seed germination trials were conducted at two temperatures in the first year (4°C and 20°C), and four temperatures in the second year (4°C, 10°C, 20°C and 30°C). In the first year, the impact of temperature during seed germination as well as dry storage on the breakdown of grain dormancy expression was investigated; whereas in the second year, the effects of ripening environment and temperature during germination on dormancy expression were determined. First year results demonstrated that soft white winter wheat does not show any grain dormancy at 20°C within the first few weeks after harvest, regardless of the temperature in which the grain was stored or germinated. Results from the second year showed that grain ripening environment has an impact on seed germination rates at different temperatures. A rain event occurred two days prior to harvest at the Corvallis, OR location but not at the Pendleton, OR location. None of the varieties showed any dormancy when they were imbibed at 20°C within 48 hours after harvest. However, some varieties demonstrated high-temperature induced dormancy when they were imbibed and kept at 30°C. This temperature slowed seed germination rate and cultivars that exhibited high-temperature induced dormancy were: Brevor, Bobtail, Cayuga, Gene, Nugaines, Rely and the experimental line 11-225-6H. There was no trend linking older released varieties to higher levels of seed dormancy compared to more recently released varieties, indicating that seed dormancy has not been systematically bred out of soft white winter wheat over time. For the second study, sixteen heads were snapped from a segregating head row that originated from a Bobtail Foundation seed field (one seed head was lost in the field). The objective of this study was to determine if the phenotypic variation was due to a contamination event or if it was a genetic variant of the variety Bobtail. There were several possibilities that could have caused the phenotypic variation such as an epistatic event, translocations, out-crossing or some type of seed contamination. To determine the source, sixteen plants from each of the fifteen heads collected from the segregating head row were grown in a greenhouse over the course of two generations. DNA samples were taken from all of the plants from the first generation. Eleven markers that showed polymorphism among a diverse panel of wheat varieties from a previous study were used in this trial and seven of the markers showed amplification and success. The results showed that there was very little variation among the individuals in this trial. The greenhouse trial that was grown to observe the plant segregation patterns revealed that the segregating lines segregated at a 3:1 awnless:awned ratio. All plants that came from an awned plant remained awned and several of the lines remained completely awnless. The marker analysis demonstrated there was no source of contamination and that plants observed segregating were a true genetic variant of the variety Bobtail. Phenotypic data showed that complete elimination of awned plants through the breeding and selection process had not occurred. Plants that came from segregating lines followed a typical Medelian segregation ratio. With this information, this variant was added to Bobtail’s variety description since it was not genotypically different.

Download or read book Zwey wahrhafftige Newe Zeitung written by and published by . This book was released on 1614 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Soft Red Winter Wheat Varieties to Rates of Top dressed Nitrogen on Two Soil Types in 1966 and 1967 written by Russell Kennedy Stivers and published by . This book was released on 1968 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Hard Red Spring Wheat Under Varying Seeding Rate and Nitrogen Management in North Dakota written by Brian Neil Otteson and published by . This book was released on 2007 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Yield and Other Agronomic Characters of Winter Wheat Cultivars as Affected by Five Seeding Rates and Three Different Environmental Conditions written by Mengü Güler and published by . This book was released on 1974 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five newly released and two Eastern European winter wheat cultivars were grown under five different seeding rates (80, 160, 240, 320, 400 seeds per m2). Four of these newly released cultivars were grown at three different locations which have different environmental conditions. Data were obtained on grain yield, tiller number per plant, 1000 kernel weight, seed number per spike, plant and spike number per unit area, plant height, heading and maturity dates. At the lowest rate of seeding the grain yield was significantly lower at all three locations. Although there were no significant differences for grain yield for all the other seeding rates, maximum yields were obtained from lower seeding rates at Ryan while at Hyslop and Madras, which had better moisture conditions, maximum yields were obtained at higher seeding rates. This situation was not observed for the Yamhill cultivar in which maximum yields were obtained at 160 seeds per m2 seeding rate at all three locations. Tillers per plant value decreased as the seeding rate increased. Hyslop and McDermid produced significantly higher number of tillers per plant from the other cultivars. Significantly highest 1000 kernel weight values were obtained at the lowest seeding rate. Yamhill produced the highest significant 1000 kernel weight while Paha produced the lowest. Seeds per spike value followed the same order as tillers per plant and 1000 kernel weight showing a continuous decrease with the increased rates of seeding. The number of plants per m2 was a direct linear function of seeding rate. The number of spikes per m2 increased curvilinearly with the increased seeding rate. Hyslop and McDermid produced the highest significant number of spikes per m2 because of their higher tillering ability. Plant height increased with increased rates of seeding because of the increased competition for light. Yamhill and Paha were significantly the tallest cultivars. The tallest plants were observed at Hyslop. There was a decrease in the number of days in heading and maturity as the rates of seeding increased. The cultivars ranked in the order Paha> Yamhill> Hyslop> McDermid for heading and maturity dates. Heading first occurred at Hyslop followed by Ryan and Madras while maturity occurred first at Ryan followed by Hyslop and Madras. Highly positive correlations were observed among plants per m2, spikes per m and seeding rate while these factors correlated negatively with tillers per plant, 1000 kernel weight and seeds per spike. The regression equations showed that maturity date, heading date and spikes per m2 values were the most important factors for predicting yield.

Download or read book The Effect of Rate and Date of Seeding Upon Yield of Shoshoni Winter Wheat in Wyoming written by and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growing Winter Wheat in New Jersey written by and published by . This book was released on 1948 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rates and Dates of Seeding Irrigated Winter Wheat Under Two Nitrogen Levels written by New Mexico State University. Agricultural Experiment Station and published by . This book was released on 1974 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Seeding Rates and Row Spacings on Winter Wheat Cultivars written by Frederick Andrew Cholick and published by . This book was released on 1977 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seeding Rates for Winter Wheat in Nebraska written by Robert Nicholas Klein and published by . This book was released on 2004 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of winter wheat trials in Nebraska shows how widely the number of seeds per pound can vary within and among varieties, leading specialists to recommend a change to planting by seeds per acre rather than seeds per pound.