ABSTRACT
Three types of land-use change will probably have the greatest effect: changes in farmed area, crop type and crop location. Where warming tends to reduce climatic constraints on agriculture, such as in high-latitude and high-altitude areas, an extension of the farmed area can be expected if other environmental factors and economic incentives permit. The amount of land-use change is likely to depend on how finely land uses in a given area are currently tuned to economics and climate, and much will depend on the changes in price that are largely determined by changes in potential in other areas. The switch of crops considered above implies changes in the allocation of land to different uses. The broadscale changes in crop location imply a general poleward shift of present-day agricultural zones. Particular aspects of husbandry are also likely to be affected, such as the density of planting, the use of fallowing and mulching and the extent of inter-cropping.
