An economic analysis of the effect of tillage, weeding and nitrogen interaction on yeild of rice [microform]
| Príomhchruthaitheoir: | |
|---|---|
| Formáid: | Visual Material |
| Foilsithe / Cruthaithe: |
Quezon City
Photoduplication Service. University of the Philippines Library
1977.
|
| Ábhair: |