Download or read book Moisture and Temperature Effects on the Transformations of Nitrogen from Applied Ammonium Sulfate in a Calcareous Soil written by John Keith Justice and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen has commonly been a deficient element in the cultivated soils of the world since the beginning of agriculture. The general acceptance of the practice of using manures as a means of increasing plant growth, as shown by the records of ancient civilizations, attest to this fact. Since the time of von Liebig there has been an increasing awareness of the importance of this deficiency in soils. As a result of a better understanding of the problem and the increasing availability of commercial forms of nitrogen, a rapid increase in the use of nitrogen fertilizers has taken place in the last few decades. This increasing use of commercial forms of nitrogen is accompanied by the need for more information concerning the proper use of these materials in order to accomplish the greatest benefit. For example, with the advent of increasing use of ammonium fertilizer to improve soil productivity, there has arisen a possibility of lengthening the period from the date of the fertilizer application to the time of utilization by the crop. this advanced application, especially in the fall of the year, has many advantages and is widely advocated. The following questions need to be answered in connection with efficiency of such a practice: Will the ammonium form of nitrogen remain unoxidized in the soil over the winter months? Could it be only partially oxidized and result in an accumulation of nitrites that may cause toxicity or be lost from the soil in gaseous forms such as nitrous oxide? What are the chance for significant losses by volatilization before it is oxidized? How does the amount of moisture and the prevailing temperature affect these transformations? The study reported here is an endeavor to contribute to more complete answers to some of these questions. Although much research has been conducted relating to the effects of moisture or temperature on nitrogen transformations in the soil, more information is needed covering greater variations in the moisture and temperature levels along with the interactions of...
Download or read book The Effect of Moisture and Temperature on Transformation of Applied Ammonium Sulfate in Several Western Soils written by Lloyd Richard Hossner and published by . This book was released on 1961 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conversion of ammonia nitrogen to nitrite and nitrate forms of nitrogen has aroused much attention in the past and continues to receive much of the energy of the present day researcher. It has been known for many years that the phenomenon of nitrification is almost in its entirety a biological process. In 1862, Louis Pasteur demonstrated the microbiological nature of the oxidation of alcohol to acetic acid. He suggested that the oxidation of ammonia might be of similar nature. In 1877 this suggestion was verified by Schloesing and Muntz, and for the next ten years the process received much attention, culminating in 1891 in the isolation of the responsible organisms by Winogradsky.
Download or read book Effects of Fertilizers on Water Quality written by National Fertilizer Development Center (U.S.) and published by . This book was released on 1969 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of Dissertations and Theses for Advanced Degrees Awarded at the Commencement written by Utah State University. School of Graduate Studies and published by . This book was released on 1954 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Soil Structure written by James Frank Breazeale and published by . This book was released on 1937 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts Series written by Utah State University and published by . This book was released on 1962 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of Dissertations and Theses for Advanced Degrees Awarded at the Commencements written by Utah State University. School of Graduate Studies and published by . This book was released on 1962 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gaseous Loss of Nitrogen from Plant Soil Systems written by J.R. Freney and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: A growing interest has been shown recently in the dymanics of nitrogen in agricultural and natural ecosystems. This has been caused by increasing demands for food and fibre by a rapidly expanding world population, and by a growing concern that increased land clearing, cultivation and use of both fertilizer and biologically fixed nitrogen can have detrimental effects on the environment. These include effects on water quality, eutrophication of surface waters and changes in atmospheric composition all caused by increased cycling of nitrogenous compounds. The input and availability of nitrogen frequently affects the productivity of farming systems more than any other single management factor, but often the nitrogen is used inefficiently. Much of the fertilizer nitrogen applied to the soil is not utilised by the crop: it is lost either in solution form, by leaching of nitrate, or in gaseous forms as ammonia, nitrous oxide, nitric oxide or dinitrogen. The leached nitrate can contaminate rivers and ground waters, while the emitted ammonia can contaminate surface waters or combine with atmospheric sulfur dioxide to form aerosols which affect visibility, health and climate. There is also concern that increased evolution of nitrous oxide will deplete the protective ozone layer of the stratosphere. The possibility of a link between the intensity of agricultural use of nitrogen, nitrous oxide emissions and amounts of stratospheric ozone has focussed attention on these interactions.
Download or read book Sulfur coated Urea Abstracts written by James W. Aldridge and published by . This book was released on 1981 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of Dissertations and Theses for Advanced Degrees Awarded at the 1959 62 Commencements written by Utah State University. School of Graduate Studies and published by . This book was released on 1962 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inorganic Nitrogen Transformations and Nitrogenous Gas Products as Affected by Soil fertilizer Geometry written by David Bezdicek and published by . This book was released on 1967 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Transformations Plant Uptake and Balance of Fall and Spring Applied Ammonia written by Phillip Michael Chalk and published by . This book was released on 1973 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Transformations in Waterlogged Soil written by Muhammed E. Tusneem and published by . This book was released on 1971 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Reporting Series written by and published by . This book was released on 1972 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1970 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Bulletin University of Arizona Agricultural Experiment Station written by University of Arizona. Agricultural Experiment Station and published by . This book was released on 1972 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
