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Dynamics of the Humus Content under Different Chernozem Treatment Conditions

The humus content in the soil is the most important factor affecting the yield of agricultural crops. The research of the impact of the soil cultivation methods upon the humus content is an urgent scientific and practical task of modern agriculture. This paper analyzed long-term (45 years) field experiments on the impact of ploughing, deep and shallow non-moldboard tillage upon the humus content in the chernozem soil of central Ukraine. The research materials reflect a broad picture of influence of the processing methods upon the accumulation of total humus. For example, with respect to ploughing with deep non-mouldboard cultivation, accumulation of the total humus in the 40 th year of research, was +0.0028%; with shallow non-mouldboard cultivation it was +0.0005%.