Field demonstration its effects on level of knowledge, understanding and attitudes of farmers about choice of a rice variety and use of fertilizers
| Κύριος συγγραφέας: | |
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| Μορφή: | Visual Material |
| Γλώσσα: | English |
| Έκδοση: |
Quezon City
University of the Philippines Library
1977.
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| Θέματα: |