A model for determination of the efficient combination of water quantity and quality (salinity) in irrigation is presented. The efficient combination is evaluated with respect to a predetermined threshold salt concentration in the soil solution. A leaching model, designed for tracing salt...

A perceptible technological transformation has been under way in India during the last few years. The output of total foodgrains increased sharply between 1967-68 and 1970-71 over previous years. There is enough evidence to show that the technological change has resulted in an upward shift in...

This study includes an estimate of cost functions for paddy farms in Formosa. Two types of estimational techniques are used; namely regression estimates and synthesized or budgeted cost curves. Long-run and short-run regression-derived curves are estimated for rice and sweet potato farms from...