The intensive agricultural production by the over use of agro-chemicals in the state of Punjab has resulted in higher NO3-N concentration in ground water, which leads to ground water pollution. The LEACHM model developed by Wagenet & Hutson is used to predict nitrogen transport in multi layered soil profile under irrigated rice crop in northern India.

The formulation of a practical conservation policy will involve a fuller consideration of human needs also. Conservation plans need to be so developed that they minimize restriction on the people of area.