The Philippines recommends for fertilizer usage.
| Awdur Corfforaethol: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Los Banos, Laguna
Philippine Council for Agriculture and Resources Research and Development
1983-
|
| Cyfres: | PCARRD technical bulletin series
no.52 |
| Pynciau: |