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close this bookAbstracts on Sustainable Agriculture (GTZ; 1992; 423 pages)
Open this folder and view contentsAbstracts On Traditional Land-Use Systems
Open this folder and view contentsAbstracts on farming systems research and development
Open this folder and view contentsAbstracts on integrated systems
Open this folder and view contentsAbstracts on cropping system
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close this folderAbstracts on soil fertility
View the documentAcknowledgements
View the document1. Soil constraints on sustainable plant production in the tropics.
View the document2. Impact of agricultural practices on soil pollution.
View the document3. The use of organic biostimulants to help low input sustainable agriculture.
View the document4. Nitrogen cycling in high-input versus reduced-input arable farming.
View the document5. Green manure in rice farming.
View the document6. Role of green manure in low-input farming in the humid tropics.
View the document7. Green manuring with vetch on acid soil in the highland region of Rwanda.
View the document8. Tropical lowland rice response to preceding crops, organic manures and nitrogen fertilizer.
View the document9. Pearl millet and cowpea yields in sole and intercrop systems, and their after-effects on soil and crop productivity.
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 )
View the document11. Evaluation of diverse effects of phosphate application on legumes of arid areas.
View the document12. Effect of n and p fertilizers on sustainability of pigeonpea and sorghum systems in sole and intercropping.
View the document13. Efficient fertilizer use in acid upland soils of the humid tropics.
View the document14. Vesicular-arbuscular mycorrhiza management.
View the document15. Impact of tropical va mycorrhizae on growth promotion of cajanus cajan as influenced by p sources and p levels.
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.
Open this folder and view contentsAbstracts on erosion and desertification control
Open this folder and view contentsAbstracts on potential crops for marginal lands

5. Green manure in rice farming.

Publ. of the International Rice Research Institute, Los Banos, Philippines, 1988, 378 pp., USD 12.30

This book embodies the proceedings of a symposium on sustainable agriculture held in 1987, at the International Rice Research Institute (IRRI), Los Banos, Philippines.

Some 92 scientists from over the world participated in the conference.

Topics include the use of green manures in China, southern Asia, parts of Africa, USA and other areas, as well as topics on woody species, N transformation, soil redox dynamics, and others dealing with general principles.

This book contains a wealth of valuable information on perennial and annual legumes as a N source and for soil improvement in upland and lowland rice production. Basic concepts and practical applications are covered well.

Discussion of N transformation, crop uptake, losses and residual is handled in an thorough manner.

Several of the writers pointed out, the value of green manuring is greater than N supply per se, e.g., several physical and chemical properties are also modified beneficially.

Contributions of N by food-crop grain and food-crop legumes were presented as an important consideration, since the economics of appropriating land and time for N production is often not cost effective due to the cost constraints of labour, land opportunity and seeds. These constraints forced a steep decline in the use of green manures in rice production everywhere as N fertilizer became available and affordable.

The first chapter of the book, nine pages, consists of the recommendations that emerged from the symposium discussions, including research needs and proposed research areas.

Advantages und disadvantages of green manure use are listed.

The papers and discussions during the symposium reconfirmed that - broadly defined - green manure does increase rice yields. Moreover, empirical evidence and theoretical considerations strongly suggest that green manure can contribute to the sustainability of tropical agricultural systems in which rice is a major crop.

The information is presented in 25, generally well-written, edited and documented chapters.

The book is a valuable resource and the information is presented interestingly.

It is an excellent reference to those involved in rice production and possibly a textbook in courses in soil management and sustainable agriculture, especially looking to the future.

1242 92 - 12/68

Soil fertility

Africa, Nigeria, humid tropics, field trials, maize, cassava, low-input agriculture, green manure, IRRI


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