ntroduction of new agricultural technology created growing realization of soil physical properties limiting crop production. However, soil physical changes and their impact on crop production are less easily realized because of their exceedingly complex and dynamic nature. Since the nature and arrangement of aggregates in soils could be expected to have a profound influence on pore space, which in turn would govern air and water relations, wide use has been made of aggregate analyses to evaluate spot physical conditions. Experience has sown that it is difficult to interpret these analyses in terms of behaviour on soils. | Effect of establishment methods and moisture regimes on physical properties of soil in a rice field under deep water table conditions of Uttarakhand
