Soil-fertilizer-plant Research, 1975-1978 PDF Download
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Author:
Publisher:
ISBN:
Category : Fertilization of plants
Languages : en
Pages : 56
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Book Description
This report summarizes findings in the agronomic area of fertilizer research from July 1, 1975, through September 30, 1978. Similar 3-year reports were issued in 1957 and at 3-year intervals thereafter.
Author:
Publisher:
ISBN:
Category : Fertilization of plants
Languages : en
Pages : 56
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Book Description
This report summarizes findings in the agronomic area of fertilizer research from July 1, 1975, through September 30, 1978. Similar 3-year reports were issued in 1957 and at 3-year intervals thereafter.
Author: National Fertilizer Development Center (U.S.)
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 48
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Book Description
Author: Estados Unidos National Fertilizer Development Center
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author:
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 64
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Author:
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 526
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Book Description
Author: J. Hagin
Publisher: Springer Science & Business Media
ISBN: 3642683274
Category : Technology & Engineering
Languages : en
Pages : 197
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Book Description
Much has been learned about the proper and judicious use of fertilizers. Fertilizer application by farmers has grown from an art to a science. As food producers have strived to increase crop yields by overcoming nutrient deficiencies the use of fertil izers has increased dramatically. This has created a large chemical industry capable of supplying the needed plant food elements. A more complete understanding of soil chemistry and plant nutrition has led to greater fertilizer use with improved fertilization methods and crop cultural practices. Improved fertilizer technology has led to the production of more efficient forms of fertilizer. The modem fertilizer industry and with it fertilization practices began in the humid countries of the world. The use of fertilizers in arid and semiarid regions was later in development, although agriculture had its beginning in semiarid and arid regions. The development offertilizer use is parallel to industrial development in various areas of the world.
Author: National Fertilizer Development Center (U.S.)
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 52
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Book Description
Author:
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 714
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Book Description
Author: J.R. Freney
Publisher: Springer Science & Business Media
ISBN: 9401716625
Category : Science
Languages : en
Pages : 325
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Book Description
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.
