00609nam a2200133Ia 4500008004100000040001700041082002300058100002300081245020800104260003600312300001600348650008300364700002800447190327s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta631.5bD229H  aDasGupta, D K (Ed) 0aHigher productivity in agriculturebproceedings of the national symposium on "approach to higher productivity of crops: held at the Ramakrishna Mission Institute of Culture (1978: Calcutta)cD K DasGupta  aNew DelhibOxford and IBHc1980  aviii, 178p.  aAgricultural policy; Agricultural productivity; Crop yields; Soil productivity  aChattopadhyay, N C (Ed)