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The Influence Of Rates And Sources Of Nitrogen With And Without A Nitrification Inhibitor On Corn Nutrition And Soil Nitrogen
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Book Synopsis The Influence of Rates and Sources of Nitrogen with and Without a Nitrification Inhibitor on Corn Nutrition and Soil Nitrogen by : Jawad K. Al-uqaili
Download or read book The Influence of Rates and Sources of Nitrogen with and Without a Nitrification Inhibitor on Corn Nutrition and Soil Nitrogen written by Jawad K. Al-uqaili and published by . This book was released on 1981 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrogen Use and Behavior in Crop Production by : L. Fred Welch
Download or read book Nitrogen Use and Behavior in Crop Production written by L. Fred Welch and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most plants absorbmore nitrogen than any other nutrient. Because the amount needed is so large and easily be lost from many soils, nitrogen is usually the most limiting nutrient for plant growth. Although about 79 percent of the atmosphere is nitrogen, only nitrogen-fixingplants such as legumeswith their associated bacteria are able to use this abundant source. The nonleguminous grain crops must receive supplemental nitrogen to produce satisfactory yields. Until the last few decades the supply of available nitrogen in the soil was increased primarily by legumes and manure. These sources should be used when economically feasible, but many important grain-producing areas of the world must now rely on commercial fertilizer nitrogen. For economic reasons researchers and growers have been interested for many years in improving yields from each unit of nitrogen. Recently, however, the efficient use of nitrogen has become an environmental issue as well, because high nitrate concentrations in water may be harmful to humans, especiali infants, and to livestock. If plants absorb more of the addedfertilizer nitrogen, then less is likely to leach from fields into drinking water. Improving nitrogen efficiency has also become crucial in order to conserve dwinling supplies of natural gas, which is used in large quantities to manufacture nitrogenfertilizers.
Book Synopsis Nitrification Inhibitor, Nitrogen Source, and Herbicide Effects on Soil Bitrogen Transformations and Corn Yield by : William Neels
Download or read book Nitrification Inhibitor, Nitrogen Source, and Herbicide Effects on Soil Bitrogen Transformations and Corn Yield written by William Neels and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen is the most limiting nutrient for crop production; however, its management has been challenging due to increasing nitrogen losses. Increased N losses have led researchers to focus on strategies for improving Nitrogen Use Efficiency (NUE). In this study, we took an integrated approach to compare the effects of N source, nitrification inhibitor and herbicide on nitrification, N loss, crop yield, residual N, and NUE. We first evaluated these factors in a twoyear field experiment. A laboratory soil incubation experiment followed. The treatments included a combination of nitrification inhibitor vs. no inhibitor, two nitrogen fertilizer sources (broadcast urea vs. injected aqueous ammonia), and a pre-emergence herbicide vs. no herbicide. Results indicated that nitrogen source has a more significant effect on NH4 + -N retention (78-80% higher in anhydrous ammonia vs. urea) than nitrification inhibitor (24-47% higher with inhibitor vs. without inhibitor) and herbicides. Similarly, nitrogen source significantly affected NO3 - -N formation (134-176% lower in anhydrous ammonia vs. urea) than nitrification inhibitor (8-31% lower with inhibitor vs. without inhibitor) and herbicides. We then evaluated the effect of nitrification inhibitor, nitrogen fertilizer source, and herbicide on (1) soil nitrification through a 25 day-soil incubation and (2) NH3 volatilization, NO3 - -N leaching, and N2O emissions through a 31-day soil column study using a loamy sand soil. Results indicated that nitrogen source had a greater effect on reducing nitrification (32.5% lower with injected aqueous ammonia vs. surface broadcast urea) compared to nitrification inhibitors (4% lower with inhibitor vs. without inhibitor) and herbicide (no effect). Surface broadest urea increased NH3 volatilization by 673% compared to injected aqueous ammonia. Injected aqueous ammonia had 22% higher NO3 - -N leaching and 33 % higher NH4 + -N leaching than urea, while nitrification inhibitor had an inconsistent effect on NO3 - -N leaching across both N sources. The results of both experiments indicated that nitrogen source plays a more significant role in regulating soil nitrogen losses than nitrification inhibitors and herbicide..
Book Synopsis Effect of Stay-N Nitrification Inhibitor Upon Corn Yield and N-uptake on Iowa Soils by : Kyle Gustav Jensen
Download or read book Effect of Stay-N Nitrification Inhibitor Upon Corn Yield and N-uptake on Iowa Soils written by Kyle Gustav Jensen and published by . This book was released on 2003 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fertilization is necessary to obtain respectable corn yields. Loss of nitrogen applied to the soil can significantly decrease yields. Suppressing the rate of nitrogen oxidation into a form that can be leached from the root zone may increase N use efficiency. The use of a nitrification inhibitor (nitrapyrin) has been shown to protect crop yield and groundwater quality when leaching conditions exist. Two year studies were conducted to determine the efficacy of reformulated nitrapyrin (Stay-N) when used with urea-ammonium nitrate solutions (liquid N fertilizer) and liquid swine manure upon corn yields. The liquid N studies were conducted in 2000 and 2001 at the Northwest Iowa Research Farm on a Galva soil (Typic Hapludoll) and in Central Iowa at the Burkey Farm on a Nicollet soil (Aquic Hapludoll). Treatments were arranged in split-plot, randomized, complete block design replicated four times. Main plots were Stay-N treatments, with (0.56 kg ai ha−1) or without Stay-N. Sub-plots were seven different rates of nitrogen: 0, 45, 90, 135, 180, 225, and 270 kg ha−1. Stay-N was mixed with the urea-ammonium nitrate solutions and sprayed on the appropriate plots using a small plot fertilizer applicator. The liquid swine manure study was conducted in 2001 and 2002 at the Armstrong Research Farm near Lewis, Iowa on a Colo soil (Cumulic Endoaquoll). The study was arranged in a randomized complete block design replicated four times. Liquid swine manure was applied to the plots to supply 0, 90, and 179 kg ha−1 of nitrogen. Stay-N rates were 0, 0.56, 1.12, and 2.24 kg ai ha−1. Stay-N was mixed with the swine manure before treatments were injected into the soil. Environmental conditions did not favor N losses during the time the studies were conducted.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fertilizer Abstracts written by and published by . This book was released on 1969 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Nutrients in Crop Plants by : Nand Kumar Fageria
Download or read book The Use of Nutrients in Crop Plants written by Nand Kumar Fageria and published by CRC Press. This book was released on 2016-04-19 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Put Theory into Practice Scarcity of natural resources, higher costs, higher demand, and concerns about environmental pollution- under these circumstances, improving food supply worldwide with adequate quantity and quality is fundamental. Based on the author's more than forty years of experience, The Use of Nutrients in Crop Plants
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Fertility Evaluation and Control by : Charles A. Black
Download or read book Soil Fertility Evaluation and Control written by Charles A. Black and published by CRC Press. This book was released on 2013-12-29 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Fertility Evaluation and Control presents the theoretical background for practical applications of scientific work on soil fertility. The book emphasizes the use of response curves as the basic biological standard for both evaluation and control, and it discusses soil testing and plant analysis as secondary standards. The principal application
Book Synopsis Soil Emission of Nitrous Oxide and its Mitigation by : David Ussiri
Download or read book Soil Emission of Nitrous Oxide and its Mitigation written by David Ussiri and published by Springer Science & Business Media. This book was released on 2012-11-13 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrous oxide gas is a long-lived relatively active greenhouse gas (GHG) with an atmospheric lifetime of approximately 120 years, and heat trapping effects about 310 times more powerful than carbon dioxide per molecule basis. It contributes about 6% of observed global warming. Nitrous oxide is not only a potent GHG, but it also plays a significant role in the depletion of stratospheric ozone. This book describes the anthropogenic sources of N2O with major emphasis on agricultural activities. It summarizes an overview of global cycling of N and the role of nitrous oxide on global warming and ozone depletion, and then focus on major source, soil borne nitrous oxide emissions. The spatial-temporal variation of soil nitrous oxide fluxes and underlying biogeochemical processes are described, as well as approaches to quantify fluxes of N2O from soils. Mitigation strategies to reduce the emissions, especially from agricultural soils, and fertilizer nitrogen sources are described in detail in the latter part of the book.
Book Synopsis Handbook of Soil Sciences by : Pan Ming Huang
Download or read book Handbook of Soil Sciences written by Pan Ming Huang and published by CRC Press. This book was released on 2011-11-17 with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evolving, living organic/inorganic covering, soil is in dynamic equilibrium with the atmosphere above, the biosphere within, and the geology below. It acts as an anchor for roots, a purveyor of water and nutrients, a residence for a vast community of microorganisms and animals, a sanitizer of the environment, and a source of raw materials for co
Download or read book Bulletin written by and published by . This book was released on 1971 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Directory, Fertilizer Research in the U.S. by : Victor L. Sheldon
Download or read book Directory, Fertilizer Research in the U.S. written by Victor L. Sheldon and published by . This book was released on 1981 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Directory lists 1425 recent and current fertilizer projects concerned with agronomic, economic, and marketing research in the United States, Puerto Rico, and the Virgin Islands.
Book Synopsis Soil-fertilizer-plant Research, 1972-l975 by : National Fertilizer Development Center (U.S.)
Download or read book Soil-fertilizer-plant Research, 1972-l975 written by National Fertilizer Development Center (U.S.) and published by . This book was released on 1975 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1989 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Residual Effects of Fall- and Spring-applied Nitrogen Fertilizers on Crop Yields in the Southeastern United States by : Robert W. Pearson
Download or read book Residual Effects of Fall- and Spring-applied Nitrogen Fertilizers on Crop Yields in the Southeastern United States written by Robert W. Pearson and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fertilizer broadcast in November or December on widely different soils at seven locations in Alabama, Georgia, and Mississippi during 1955-59 was only 49 percent as effective as nitrogen fertilizer applied the following spring when measured by corn yields. In terms of nitrogen recovered, the relative effectiveness was 62 percent. There were no consistent differences among the five nitrogen sources applied in the fall as measured by corn yields, but nitrogen recovery tended to be lower from urea than from the other sources. Considerable residual effects of spring-applied nitrogen were found over a period of 16 months based on both yield and nitrogen uptake by the crops. Average uptakes of 25 and 34 pounds per acre of additional nitrogen were made by the second and third crops, respectively, from the 200-pound original application. This residual nitrogen produced average yield increases of 1,600 pounds of dry forage and 19 bushels of corn per acre. These results emphasize the economic importance of residual nitrogen and the need for soil test procedures for its estimation.
Book Synopsis Bibliography of Agriculture with Subject Index by :
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1987-10 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
