Dananjana, G.A.N.; Thayamini, H. Seran
(Faculty of Agriculture, University of Ruhuna, Sri Lanka, 2022)
Cowpea (Vigna unguiculata L. Walp.) is a significant food and grain legume in the semi-arid tropic. Red onion
peels are utilized to produce organic potassium rich fertilizer for the cultivation of crops. Hence, this ...