Water Logging

Historically, man as hunter-gatherer could not affect the environment because he was using the natural population of animals and plants well below the sustainable yields except in those areas where trading of animals and/or plants was introduced.
Man's agricultural use of land is a relatively recent event. The evolution of systematic agriculture of today is 200 years old and dates back to the days of the Industrial Revolution.
Agriculture has been considered as a way of life. Ever increasing population places greater demands on agriculture to increase the production, to match the increasing demands for food supply. With agricultural development though food production has successfully increased nearly everywhere but it has failed to match with the growing population in many areas - specially developing countries of Africa, Asia and Latin America.
This again has forced the pace of agricultural development to be maintained, so that teeming millions do not starve.
Over the period of time, the development of agriculture was achieved in terms of:
1. Expansion and /or conversion of agricultural lands;
2. Increased agricultural productivity;
3. Multiple-cropping pattern;
4. Conversion of single-cropping system to two tier and / or three tier cultivation and
5. Expansion of natural limits.
In due course of time, agricultural development became possible due to (a) development of modern scientific techniques; (b) advanced technology; (c) expansion of irrigational facilities: (d) use of chemical fertilizers; (e) use of pesticides and insecticides; (f) development and use of high yielding varieties of seeds; (g) changed agricultural practices; (h) mechanization of agriculture; (i) varying crop sequences and (j) land ownership and the land tenure.
It will be difficult for us to maintain our present standard of living and current consump