Estimation of Available Nitrogen Content in Soil Directly by Temperature Measurement

Abstract

Nitrogen (N) is the largest available element in the atmosphere .It is normally available in
gaseous form. For the proper growth of plant it is the most nutrients.The scarcity as well as the
abundance of the nitrogen directly effect the crop yield. There is a natural nitrogen cycle which
maintains the nitrogen level in soil. Various methods are used to replenish the nitrogen level in soil. This
method evolves the conversion of nitrogen into form which plants can use. Some processes can lead to
N losses such as leaching or volatilization. Nitrogen is added to soil naturally from N fixation by soil
bacteria and legumes and through atmospheric deposition in rainfall. Externally N is added supplied to
the crop by fertilizers, manure, or other organic materials. Hence there is a direct correlation between
crop yield and the nitrogen content in the soil. In this paper an easy and fast method of determination of
available nitrogen in soil is discussed.