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Influence Of Planting Date And Weed Emergence Patterns On Weed Management Strategies In Early Maturing Soybean Cultivars
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Book Synopsis Influence of Planting Date and Weed Emergence Patterns on Weed Management Strategies in Early Maturing Soybean Cultivars by : Richard Costello
Download or read book Influence of Planting Date and Weed Emergence Patterns on Weed Management Strategies in Early Maturing Soybean Cultivars written by Richard Costello and published by . This book was released on 1995 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this jOint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 40 (thesis year 1995) a total of 10,746 thesis titles from 19 Canadian and 144 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 40 reports theses submitted in 1995, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Book Synopsis Influence of Row Pattern, Planting Date, and Herbicide Systems on Weed Management and Net Returns in Minimum-tillage Soybeans (Glycine Max) by : Brian Earl Gamble
Download or read book Influence of Row Pattern, Planting Date, and Herbicide Systems on Weed Management and Net Returns in Minimum-tillage Soybeans (Glycine Max) written by Brian Earl Gamble and published by . This book was released on 1986 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of Early-season Weed Management and Soybean Nutrition by : Nick T. Harre
Download or read book Dynamics of Early-season Weed Management and Soybean Nutrition written by Nick T. Harre and published by . This book was released on 2014 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The popularity of growers using only postemergence (POST) herbicides for weed management in soybean was enabled by the commercialization of glyphosate-resistant soybean. Field experiments were conducted across four sites throughout southern Illinois in 2012 and 2013 to study the influence of early-season weed management strategies on soybean nutrient accumulation, grain yield parameters, and the acquisition of nutrients by broadleaved and grass weeds. Increasing periods of weed competition duration were established by removing weeds at heights of 10, 20, 30 or 45 cm with glyphosate. A weed-free treatment utilizing a comprehensive soil residual and POST herbicide program was included to implement a weed-free comparison. Two standard herbicide management strategies that simulate common grower practices were also evaluated for comparison: flumioxazin PRE followed by glyphosate POST and two sequential POST glyphosate applications. Averaged across all 11 mineral nutrients analyzed in this experiment, broadleaved weeds accumulated 149 and 108% more nutrients than grasses in 2012 and 2013, respectively. Competition from 20-cm weeds reduced the acquisition of N, P, Ca, Mg, S, Fe, B, Cu, and Zn by soybean in 2012; these nutrients in addition to K and Mn were reduced by the same level of competition in 2013. N and Fe were the nutrients in soybean most notably impacted by weed interference. Reductions in soybean grain yield were the result of competition with 30-cm weeds in 2012, and 10-cm weeds in 2013; while, both standard herbicide regimens yielded less than the weed-free treatment in 2013 only. Additionally in 2013, average soybean seed weight and grain oil content was reduced when weeds were not removed before a height of 10 and 20 cm, respectively. The rate of decomposition and nutrient release was measured for waterhemp and giant foxtail desiccated by glyphosate at heights of 10, 20, 30, and 45 cm in two southern Illinois soybean fields. Weed biomass was grown under greenhouse conditions to ensure homogeneity and litterbag methodology was utilized to track in situ mass and nutrient losses, expressed as a decay constant (k) regressed over time according to the single exponential decay model. The effect of specie and height both had a strong influence on the intrinsic properties of the weed biomass and the associated rate of decay. Concentrations of the recalcitrant cell wall components (cellulose, hemicellulose, and lignin) were generally greatest as weed height (plant age and development) increased and with giant foxtail compared with waterhemp. Ca, Mg, and S concentrations were greater in waterhemp, while N was greater in giant foxtail. N and K concentrations decreased with increasing weed height. After 16 weeks, 10-cm waterhemp and giant foxtail detritus had lost 10 and 12% more mass compared to the 45-cm height. Decomposition rates revealed mass loss was highest for 10-cm waterhemp (kD = 0.022) and lowest for 45-cm giant foxtail (kD = 0.011) and this process was negatively correlated to the overall amount of cell wall constituents (r = -0.73). Nutrient release rates followed a similar trend in that shorter (younger) weeds and waterhemp liberated nutrients more readily. Across all tested plant material, K was the nutrient most rapidly released, whereas, Ca was the most strongly retained nutrient. Although the pressing challenge of managing herbicide-resistant weeds justifies the implementation of early-season weed control tactics, this research suggests there are ancillary benefits that are provided by this strategy. The use of a robust, broad-spectrum soil residual herbicide program in conjunction with timely POST applications provides the foundation for early-season weed management, thereby minimizing non-crop nutrient use and enhancing the nutrient acquisition capacity in soybean. This strategy facilitates more sustainable crop production by requiring fewer supplemental nutritional inputs while also protecting grain yield. (Abstract shortened by UMI.)
Book Synopsis 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 by : Mehmet Ozel Ergen
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:
Book Synopsis Harvest Date, Tillage, and Other Agronomic Management Effects on Yield and Seed Quality of Solid-seeded Soybean by : Brent Douglas Philbrook
Download or read book Harvest Date, Tillage, and Other Agronomic Management Effects on Yield and Seed Quality of Solid-seeded Soybean written by Brent Douglas Philbrook and published by . This book was released on 1988 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Planting Pattern Study of Early Maturing Soybean Cultivars in Kentucky by : Htain Lin
Download or read book A Planting Pattern Study of Early Maturing Soybean Cultivars in Kentucky written by Htain Lin and published by . This book was released on 1990 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Planting Date and Tillage Method on Soybean Varieties from Four Maturity Groups by : Carl H. Hovermale
Download or read book Effects of Planting Date and Tillage Method on Soybean Varieties from Four Maturity Groups written by Carl H. Hovermale and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emergence, Seedling Growth, and Area of Influence of Weeds Common in Soybeans (Glycine Max) by : David W. Monks
Download or read book Emergence, Seedling Growth, and Area of Influence of Weeds Common in Soybeans (Glycine Max) written by David W. Monks and published by . This book was released on 1985 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Planting Date and Maturity Group on Management Strategies for Insect Pests in Soybean by : Nicholas Ryan Bateman
Download or read book Impact of Planting Date and Maturity Group on Management Strategies for Insect Pests in Soybean written by Nicholas Ryan Bateman and published by . This book was released on 2017 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean accounts from more than half of the acres dedicated to row crop production in the mid-south, leading to a wide planting window from late-March through mid-July. Studies were conducted in 2013 and 2014 evaluating seven planting dates of soybean, and their impact on agronomics. As planting was delayed, plant heights significantly increased, increasing the potential for lodging. Canopy closure significantly decreased as planting was delayed, leaving soybean more vulnerable to caterpillar pests. Yield potential also significantly decreased as planting was delayed. Season long surveys of insect pests and their arthropod natural enemies were conducted from 2013 to 2014 in small plot studies, and in large plot studies from 2015 to 2016 across multiple planting dates. The most common insect pests encountered in both studies were bean leaf beetles, the stink bug complex, and soybean looper. The most common natural enemies encountered were lady beetles, spiders, and the assassin bug complex. In general, insect pests densities increased as planting was delayed, whereas natural enemies were higher in earlier plantings or had no change throughout the planting windows. With the increased difficulty of controlling some caterpillar pests such as soybean looper, new control tactics need to be evaluated. A simulated Bt treatment was evaluated against a threshold, bug only, and untreated control across multiple plantings in 2013 and 2014. The simulated Bt treatment yielded significantly higher than the untreated control at plantings from early June through mid-July. These were the only plantings that reached action threshold for soybean looper. The simulated Bt and threshold treatments were not significantly different from one another. In 2015 and 2016, a simulated Bt treatment plus threshold was evaluated in a late planting situation. The simulated Bt plus threshold treatment yielded significantly higher than the untreated control at the early-June and early-July plantings. Also in 2015 and 2016, the simulated Bt treatment was evaluated against a grower check on producer fields at 23 locations. The simulated Bt treatment resulted in significantly higher soybean yields than the grower check.
Book Synopsis The Effect of Planting Date, Cultivar, and Seed Size on Emergence, Leaf Area Development, and Growth of Soybeans by : Rolf Lynn Wells
Download or read book The Effect of Planting Date, Cultivar, and Seed Size on Emergence, Leaf Area Development, and Growth of Soybeans written by Rolf Lynn Wells and published by . This book was released on 1977 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Row Spacing and Planting Date Effect on Yield and Growth Responses of Soybeans by : D. J. Boquet
Download or read book Row Spacing and Planting Date Effect on Yield and Growth Responses of Soybeans written by D. J. Boquet and published by . This book was released on 1983 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A History of Weed Science in the United States by : Robert L Zimdahl
Download or read book A History of Weed Science in the United States written by Robert L Zimdahl and published by Elsevier. This book was released on 2010-02-04 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is important that scientists think about and know their history - where they came from, what they have accomplished, and how these may affect the future. Weed scientists, similar to scientists in many technological disciplines, have not sought historical reflection. The technological world asks for results and for progress. Achievement is important not, in general, the road that leads to achievement. What was new yesterday is routine today, and what is described as revolutionary today may be considered antiquated tomorrow. Weed science has been strongly influenced by technology developed by supporting industries, subsequently employed in research and, ultimately, used by farmers and crop growers. The science has focused on results and progress. Scientists have been--and the majority remain--problem solvers whose solutions have evolved as rapidly as have the new weed problems needing solutions. In a more formal sense, weed scientists have been adherents of the instrumental ideology of modern science. That is an analysis of their work, and their orientation reveals the strong emphasis on practical, useful knowledge; on know how. The opposite, and frequently complementary orientation, that has been missing from weed science is an emphasis on contemplative knowledge; that is, knowing why. This book expands on and analyzes how these orientations have affected weed science’s development. The first analytical history of weed science to be written Compares the development of weed science, entomology and plant pathology Identifies the primary founders of weed science and describes their role
Book Synopsis Weed Control in Early-maturing Mississippi Soybean at Various Row Spacings and Planting Dates by : Roy Matthew Griffin
Download or read book Weed Control in Early-maturing Mississippi Soybean at Various Row Spacings and Planting Dates written by Roy Matthew Griffin and published by . This book was released on 2003 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soybean written by Hany El-Shemy and published by BoD – Books on Demand. This book was released on 2011-11-02 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide, soybean seed proteins represent a major source of amino acids for human and animal nutrition. Soybean seeds are an important and economical source of protein in the diet of many developed and developing countries. Soy is a complete protein and soyfoods are rich in vitamins and minerals.Soybean protein provides all the essential amino acids in the amounts needed for human health. Recent research suggests that soy may also lower risk of prostate, colon and breast cancers as well as osteoporosis and other bone health problems and alleviate hot flashes associated with menopause. This volume is expected to be useful for student, researchers and public who are interested in soybean.
Book Synopsis Influence of Planting Date and Cultivar Maturity on Sudden Death Syndrome of Soybean by : Stephen Karanja Kiarie
Download or read book Influence of Planting Date and Cultivar Maturity on Sudden Death Syndrome of Soybean written by Stephen Karanja Kiarie and published by . This book was released on 1989 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Planting Date on Common Cocklebur Interference in Early-maturing Soybeans by : Gregory Scott Rushing
Download or read book Influence of Planting Date on Common Cocklebur Interference in Early-maturing Soybeans written by Gregory Scott Rushing and published by . This book was released on 1995 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
