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11
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12
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13
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14
Ecological study of the Bontoc rice paddy system a case of human-environment interaction
Published 1982Analytics -
15
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16
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17
Factors affecting productivity and adoption of improved farm practices in rice farms [microform]
Published 1977Visual Material -
18
The effects of irrigation methods on the yield, water requirement and nitrogen utilization of lowland rice [microform]
Published 1977Visual Material -
19
The economic and technical aspects of water application on rice [microform]
Published 1977Visual Material -
20
The economics of pump irrigation in low-land rice production, Cabuyao, Laguna, 1964-1969 [microform]
Published 1977Visual Material


