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Nitrogen-potassium ratios in relation to nutrient content and yield of cotton [microform].
Udgivet 1980Visual Material -
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Content analysis of criterion-referenced tests used in the Division of Isabela [microform].
Udgivet 1980Visual Material -
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Yield response curve of sugarcane under varying levels of nitrogen fertilization and water regimes [microform].
Udgivet 1980Visual Material -
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The translatability from English to Pilipino of terms used in rice production an exploratory study [microform].
Udgivet 1980Visual Material -
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Biological constraints to high yields in selected farmers' fields in Iloilo, Philippines [microform].
Udgivet 1980Visual Material -
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