Soil management under no-tillage systems in the tropics with special reference to Brazil

Machado, P.L.O. de A. and Silva, C.A. (2001) Soil management under no-tillage systems in the tropics with special reference to Brazil. Nutrient Cycling in Agroecosystems, 61 (1/2). pp. 119-130.

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Because of cost reductions and soil erosion control, no-tillage is being rapidly adopted by farmers in the Americas, particularly in the humid and subhumid tropics. Compared to conventional tillage (tillage operations resulting in <30% cover of plant residue remaining on the surface), no-tillage combined with crop rotation involving cover crops increases soil organic matter content, whilst improving soil fertility. This was mostly evident at 0-5 cm depth. Further successful adoption by farmers, including smallholder farmers from different regions, depends on improvements of various aspects, from edaphological constraints (e.g. in Brazil) to social and infrastructural limitations (e.g. in West and Central Africa). Special emphasis is given to the effects of no-tillage on soil organic matter and the consequences on some chemical (e.g. subsoil acidity, fertilizer management) and physical properties of soils (e.g. soil compaction, aggregate stability). Research imperatives for regional improvement or adaptation of such a conservation tillage are emphasized together with social and economical aspects for its adoption.

Item Type: Article
Additional Information: Special issue: Managing organic matter in tropical soils: scope and limitations. Proceedings of a Workshop organized by the Centre of Development Research, University of Bonn, Germany, 7-10 June 1999.
Author Affiliation: Embrapa Solos, Rua Jardim Botânico, 1024 CEP 22460-000, Rio de Janeiro, RJ, Brazil
Subjects: Plant Production > Croping Systems
Plant Production > Farming Systems
Soil Science and Microbiology > Soil Sciences
Divisions: Other Crops
Depositing User: Sandhya Gir
Date Deposited: 15 Oct 2010 08:20
Last Modified: 15 Oct 2010 08:20
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