Breeding for resistance to rust diseases in wheat is an example of productivity maintenance research. Productivity maintenance research is necessary to avoid contractions in the wheat supply curve that result from changes ...

This study in Enebssie area, Ethiopia, aimed to identify farmers' wheat seed acquisition and transfer mechanisms; explore problems related to those mechanisms; document the status of previously released wheat varieties; ...

This paper develops a theoretical model for analyzing gene bank management decisions regarding the search for traits of economic value in ex situ collections of wheat. The model is applied to data on the probability of ...

This report presents results of the analysis of data from a survey conducted during the fall-winter 1993/94 crop cycle in the Yaqui Valley of northwestern Mexico. It describes the agronomic characters of wheat producers ...

This study describes the Ethiopian wheat seed system, identifies how farmers acquire and exchange wheat seed, explores problems related to farmers' acquisition and transfer of wheat seed, documents the status of previously ...

The impact of maize research and extension in Tanzania's Northern Zone during the past 20 years was evaluated through a formal survey in 1995. Data were grouped into two major agroecological zones: the intermediate and the ...

This report of the adoption of maize production technologies in the Southern highlands of Tanzania forms part of a larger study to evaluate the impact of maize research and extension throughout Tanzania over the past 20 ...

The main farming systems of the Texizapan watershed in southern Veracruz, Mexico (200-1,640 meters above sea level) were characterized through a formal survey in 1995. Farm-level data included an inventory of resources ...