Influence of Different Methods and Levels of Irrigation on Photosynthetic Pigments in Relation to Yield of Oil Palm (Elaeis guineensis Jacq.) Journal title: International Journal of Current Microbiology and Applied Sciences (IJCMAS) Authors: M. Chandra Surya Rao, B.N. Rao, V. Vijaya Bhaskar, K. Suresh, S. Kalpana Subject(s):