The Fate of Nitrogen in a Nutritional and Chemical Evaluation of Nitrogen Supplements Added to Corn Silage PDF Download
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Author: Jorge Lopez
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 420
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Author: Jorge Lopez
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 420
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Author: Eugene Everett Megli
Publisher:
ISBN:
Category :
Languages : en
Pages : 96
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Author: Richard Arnold Everson
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
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Author: James Leo Paschal
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 80
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Author: Xerox University Microfilms
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1226
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Author: James Stuart Schepers
Publisher: ASA-CSSA-SSSA
ISBN: 9780891181644
Category : Technology & Engineering
Languages : en
Pages : 994
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Book Description
Review of the principles and management implications related to nitrogen in the soil-plant-water system.
Author: Robert W. Pearson
Publisher:
ISBN:
Category : Nitrogen fertilizers
Languages : en
Pages : 24
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 704
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Author: L. Fred Welch
Publisher:
ISBN:
Category : Crops and nitrogen
Languages : en
Pages : 62
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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.
Author: University of Wisconsin. Center for Studies in Vocational and Technical Education
Publisher:
ISBN:
Category : Dairying
Languages : en
Pages : 100
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