Dissanayakar, D. M. P. V.; Ranasinghe, R. A. D. R. A.
(Faculty of Technology, South Eastern University of Sri Lanka, University Park, Oluvil., 2023-12-12)
Betel plant (Piper betle) leaves, harvested at
frequent intervals, result in the permanent
depletion of soil nutrients. Farmers often
complain that the amount of fertilizer
recommended by the Department of Export
Agriculture ...