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Закрити книгу / close this bookAbstracts on Sustainable Agriculture (GTZ; 1992; 423 pages)
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts On Traditional Land-Use Systems
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on farming systems research and development
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on integrated systems
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on cropping system
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on agroecology
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on agrometeorology
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on agroforestry
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on homegardens
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on seed production
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on plant protection
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on water management
Закрити папку / close this folderAbstracts on soil fertility
Перегляд документу / View the documentAcknowledgements
Перегляд документу / View the document1. Soil constraints on sustainable plant production in the tropics.
Перегляд документу / View the document2. Impact of agricultural practices on soil pollution.
Перегляд документу / View the document3. The use of organic biostimulants to help low input sustainable agriculture.
Перегляд документу / View the document4. Nitrogen cycling in high-input versus reduced-input arable farming.
Перегляд документу / View the document5. Green manure in rice farming.
Перегляд документу / View the document6. Role of green manure in low-input farming in the humid tropics.
Перегляд документу / View the document7. Green manuring with vetch on acid soil in the highland region of Rwanda.
Перегляд документу / View the document8. Tropical lowland rice response to preceding crops, organic manures and nitrogen fertilizer.
Перегляд документу / View the document9. Pearl millet and cowpea yields in sole and intercrop systems, and their after-effects on soil and crop productivity.
Перегляд документу / View the document10. Influence of some characteristics of bean seed and seedlings on the tolerance to low phosphorus availability in the soil. (Infuencia de algunas caracteristicas de las semillas y plantulas de frijol Phaseolus vulgaris L. sobre la tolerancia a la baja disponibilidad de fósforo en el suelo )
Перегляд документу / View the document11. Evaluation of diverse effects of phosphate application on legumes of arid areas.
Перегляд документу / View the document12. Effect of n and p fertilizers on sustainability of pigeonpea and sorghum systems in sole and intercropping.
Перегляд документу / View the document13. Efficient fertilizer use in acid upland soils of the humid tropics.
Перегляд документу / View the document14. Vesicular-arbuscular mycorrhiza management.
Перегляд документу / View the document15. Impact of tropical va mycorrhizae on growth promotion of cajanus cajan as influenced by p sources and p levels.
Перегляд документу / View the document16. Benefit and cost analysis and phosphorus efficiency of va mycorrhizal fungi colonizations with sorghum (sorghum bicolor) genotypes grown at varied phosphorus levels.
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on erosion and desertification control
Вiдкрити папку i переглянути змiст / Open this folder and view contentsAbstracts on potential crops for marginal lands
 

2. Impact of agricultural practices on soil pollution.

Outlook on agriculture, 20, 3, 1991, pp. 153-160

There is a growing appreciation of the need to preserve soils and their chemical status.

There is an urgent requirement to understand and quantify the various inputs and outputs in order to devise protection policies for this key resource.

This paper focuses on the problems that result from high inputs of plant nutrients, from fertilizers or animal excreta, and from the pesticides that are associated with intensive production. Concern is not only about the direct effects on soils but also on leakages to both water and the atmosphere.

Soils are the base resource for food production.

Their physical and chemical properties are wide-ranging, allowing them to act as sinks or sources in complicated cycles and buffer changes in the flows of materials to other compartments of the ecosystem.

Man's activities can disturb the equilibria involved through

 

- manufacturing and energy-related activities, resulting in atmosheric inputs of sulphate, acidity, nitrogen (N) and trace metals, for example, or indeed accidental inputs of radio- nucleides,

- urbanization, resulting in direct losses or changes due to recreational activities and

- agricultural manipulations.

The effects of agriculture can be physical, induced by mechanically working the soil in an inappropriate way to result in, for example, soil compaction or erosion, or they may be chemical.

This article is concerned with some of the problems associated with chemical changes.

In detail, the effects of fertilizers, slurries and manures from housed livestock and pesticides are discussed.

1239 92 - 12/65

Soil fertility

USA, field study, greenhouse study, organic biostimulants, low-input agriculture, forestry, horticulture, plant growth, stress resistance, fertilizer application, organic agriculture

RUSSO, R.O. and G.P. BERLYN

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