Quantitative impacts of the Green Revolution on food production in the Pakistan Punjab are reviewed and the effects of different technologies on wheat yields over the past two decades decomposed. New quantitative evidence ...

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 ...

Yield gains may continue to be the most important factor affecting varietal change in post-Green Revolution agriculture, but they are often not as spectacular as in the initial shift to high-yielding varieties. A survey ...