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Biological constraints to high yields on some rice farms in Nueva Ecija, Philippines [microform]
Published 1981Visual Material -
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Biological constraints to high yields in selected farmers' fields in Iloilo, Philippines [microform].
Published 1980Visual Material -
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Yellowing in rice plants caused by pathogens and nutrient deficiencies [microform]
Published 1979Visual Material -
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Combining data from rice experiments over locations and seasons [microform]
Published 1977Visual Material