The potential of Crotalaria ochroleuca check for this species in other resources as a green manure crop was evaluated in a series of on-station and on-farm trials on reddish kaolinitic loam and sandy clay loam soils in Uganda. Production of the green manure by intercropping Crotalaria with either maize or beans was found to be feasible with little reduction in food crop yield and a mean Land Equivalent Ratio of 1.3. The large amounts of N in the Crotalaria indicates that large quantities of N were biologically fixed.

Se cuantificó la biodiversidad, abundancia y biomasa de la macrofauna en diferentes usos del suelo utilizando la metodología propuesta por el programa Tropical Soil Biology and Fertility (TS.B.F.).
La mayor biodiversidad la presento el cacaotal (47 u.-t.), mientras que el tratamiento con mulch tiller tuvo la mayor abundancia (122 ind/0.062 m2) y el sistema de siembra directa la mayor biomasa (5.44 g/0.062 m2).

This audiotutorial unit (cassette, printed script, 139 color slides, study guide, self-evaluation test), prepared by the Communications Support Unit at CIAT, is available for use with a manually or automatically synchronized slide projector/cassette tape recorder. Each unit is available from the Distribution Office at a cost of US$$50; photocopies of the study guide alone can be obtained from the Bean Information Center. Hybridization or crossing constitutes the principal means for genetic improvement of plants.

Livestock in south-east Asia are used for a wide variety of purposes. In many regions, there is an increasing demand for animal protein but, at the same time, increasing population pressure is pushing livestock on to more marginal lands. These marginal lands are generally uplands where soils are acid and infertile.

This article presents criteria and recommendations to support the landuse planning process in the savanna land ecosystem of the municipality of Puerto Lopez. These criteria were established from the analysis and correlation of the characteristics of the landscape and soils, taking in consideration biophysical and management aspects. They are expressed as limitations and potentialities for the crops, agroforestal production and conservation, and are given for the different geomorphological positions.