Improved iron Ploughing implements, tractors, threshers, tube wells, chemical and bio-fertilizers and high-yielding seeds, constitute the inputs of new farmtechnology. The presence of each of these factors of production in terms of quantum, quality and price varies spatially, affecting relationship between them and their effecton the development of individual farms (Morgan and Munton, 1971). At the same time, use of each factor does not depend entirely on its availability- it is also influenced by technical, economic and social conditions which may or may not permit its utilization and the substitution of one factor by another. The impact of all these material factors on agricultural productivity can be assessed either by estimating the output per unit area attributable to them, or by measuring their use per unit area.

The former is beset with difficulties of estimation, where as the latter can be made more feasible by a careful examination of available data and field observations.

The role of modern inputs in promoting agriculture in developing countries is being increasingly recognized. Nevertheless, their agriculture development may not be uniform on account of regional variations in the use of some important resources which are basic to