Mediante un minisimulador de lluvia se evaluaron los cambios en pérdida de suelo y en algunas propiedades físicas asociadas con el movimiento del agua, en un Inceptisol (Dystric haplustepts) de la zona de reconversión del cultivo de trigo del departamento de Nariño, Colombia (75º 14Ž oeste, 0.5º 10Ž norte, 2.710 msnm, 79% HR, 12ºC). Los tratamientos fueron: Suelo no intervenido a 25% de pendiente (testigo), uso en pastura por 25 años, 25% de pendiente y uso agrícola rotación trigo-maíz (rt-m) de 25, 45 y 70 años de uso, cada uno de estos últimos a 12% y 25% de pendiente.

Successful control of tsetse (Glossina spp.)-transmitted trypanosomiasis in the Ghibe Valley, Ethiopia, appears to have accelerated conversion of wooded grassland into cropland. Land conversion, in turn, may have fragmented wildlife habitat. The objective of this paper was to assess the influence of the expansion of agricultural land-use, brought about by tsetse control, on ecological properties by using bird species richness and composition as indicators of environmental impacts.

Increased adoption of climbing beans ( Phaseolus vulgaris check for this species in other resources L.) in Kabale district, south-western Uganda, has been limited by scarcity of staking materials, despite the crop's higher yield potential compared to bush bean types when grown on fertile soils. There is therefore need to explore other appropriate mechanisms such as intecropping, that could substitute use of stalks.

Powerpoint presentation by the International Center for Tropical Agriculture (CIAT) about the ten key steps for "ELMO".

This audiotutorial unit (cassette, printed script, 70 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 Cassava Information Center. Data are given on the biology of the hornworm, its economic importance and possible methods of control.

This audiotutorial unit (cassette, printed script, 124 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.