Description:
This CIMMYT paper describes maize research and development in Tanzania, gives production technology recommendations, and discusses the cultural as well as socioeconomic factors that influence maize production.

Accessible from:
http://www.cimmyt.org/Research/nrg/pdf/NRG01-01.pdf

Description:
Primer cartel con dibujos sobre la asociación de cultivos y rotación para controlar malezas y plagas y tambien para el uso eficiente de los nutrientes. Sección del libro en internet "Mejorando la Nutrición a través de Huertos y Granjas Familiares: manual de capacitación para trabajadores de campo en América Latina y el Caribe" (FAO, 2000).

Accessible from:
http://www.fao.org/DOCREP/V5290S/v5290s35.htm#P1_23

Description:
This factsheet from the University of Rhode Island (USA), briefly describes how some plants enhance environmental conditions for growth and others poison their neighbor's offspring to maintain a competitive advantage.

Accessible from:
http://www.uri.edu/ce/factsheets/sheets/compplant.html

Description:
This brief news article is from New Agriculturalist on-line. It reports on the development of a sustainable farming system in Peru, that may provide researchers with clues to how the Mayans produced food for a dense population without sacrificing soil fertility.

Accessible from:
http://www.new-agri.co.uk/00-2/develop/dev03.html

Description:
Escrito por Miguel A., este artículo en la Revista de CLADES, Agroecología y Desarrollo (marzo 1991), incluye una tabla con ejemplos de sistemas de manejo de suelos, agua, y vegetación utilizados por agricultores tradicionales del Tercer Mundo y referencias a la literatura científica.

Accessible from:
http://www.clades.org/r1-art2.htm

Description:
Iowa State University Extension Service has published an article dealing with the relationship between cultural practices, crop productivity and soil erosion. (pdf only).

Accessible from:
http://extension.agron.iastate.edu/soilmgmt/Publications/pm1870.pdf

Description:
This brief IIRR (International Institute of Rural Reconstruction) article discusses the Machobane farming system. It is an intensive cropping system developed by James Machobane during the 1950's. It uses crop rotation, relay cropping, and intercropping practices to improve the productivity on small-scale farms in Lesotho.

Accessible from:
http://www.iirr.org/saem/page171-176.htm