Assessment of Soil Bulk Density and Moisture Content of Light-Gray-Brown Arable Soils at the Rainfed Condition

Abstract

The article discusses the effects of different tillage methods, predecessors, and mineral fertilizers on the soil bulk density and soil moisture content of light-gray-brown soils at the rainfed condition. The results of the research conducted during the years 2014-2017 under cereal crops reveal that the soil bulk density and soil moisture content exhibit dynamic changes within the vegetation period, depending on the tillage method, the growth stages of the crops and other factor. Furthermore, there is differentiation in the moisture content and soil bulk density between the topsoil and the subsoil layer. During the research period moisture content varies depending on precipitation, crop growth stages, predecessors. Optimum moisture level is observed within periods of relatively higher precipitation and intensive growth stage of crops. Soil bulk density has varied within the range of 0.97-1.53 g/cm³. Favorable physical condition has been observed under the conventional and minimum tillage. Based on the research findings, the bulk density and moisture content of light-gray-brown arable soils can be assessed satisfactory through relevant quantitative indicators.