This study makes use of data on wheat production in the Punjab of Pakistan from 1979 to 1985 to 1) examine patterns of varietal diversity in farmers' fields both at the regional and district levels and 2) identify how and ...

This paper summarizes what is known about farm-level maize seed management practices and reviews the theoretical and empirical evidence regarding the relationship between farmers’ seed recycling practices and the genetic ...

This study uses an approach derived from models of the private and public characteristics of goods to illustrate (1) the overriding importance of variety attributes in farmers' decisions to allocate area among varieties ...

This publication documents the origin and worldwide spread of maize from Mesoamerica, and describes the characterization, use, and conservation of maize genetic resources, including the crop's nearest wild relatives, ...

Prior to the late 18th century, agricultural practices were totally dependent on crude handtools, crop landraces, and mixtures of these landraces. Then came the Industrial Revolution with an associated population explosion ...