TY - GEN AU - De Zoysa, Demuni Jercy Susil Jayawardhana TI - Use of rubber factory effluents as a source of N.P. and K for rubber and paddy plants U1 - 631.807245493 PY - 1991/// CY - Matara PB - University of Ruhuna KW - AGRICULTUR KW - PADDY KW - PLANTATION KW - POST GRADUATE THESIS ENGLISH KW - RUBBER KW - Thesis ER -