Cyclones, droughts, floods, and rare cold spells all can be important limits on agricultural development. It is possible to change some aspects of the climate as they affect agriculture. Careful selection of the land can reduce the risk of wind damage or flooding. Rows of trees can be planted as wind-breaks to shelter crops. Proper drainage or the construction of rows or mounds can reduce the damage from flooding.
Irrigation can provide water when natural rainfall is insufficient.
The limitations then become economic rather than climatic. Biological interactions Almost all crop plants and domestic animals have been introduced from somewhere else, and are grown close together in large numbers. As with any large-scale introduction of an organism that does not naturally occur in a place, there is a risk of imbalances, and particularly of the rapid spread of pests or diseases. When a crop is grown over large areas, any pest that takes a liking to it will find an abundant food supply, and will be able to multiply very rapidly. While it may be technically easier and more economic to plant large fields of the same thing, it will also be necessary to use more pesticides because the crop will be more vulnerable to attack.