R. Ayyangar

Effects of Lindane and Carbaryl on Insects, Soil and Plant Nitrogen, and Grain Yield of Rice

S. Datta, R. Ayyangar, J. Magbanua, 1967, Experimental Agriculture.

Inferred leaf senescence of rice crop and its relationship with grain yield

M. Rao, P. Rao, R. Ayyangar, 1985, Journal of the Indian Society of Remote Sensing.

Crop cover and crop phenological information from red and infrared spectral responses

P. N. Rao, K. R. Rao, R. Ayyangar, 1980, Journal of the Indian Society of Remote Sensing.