Yield and nutrient content of purple and white varieties of yam (Dioscorea alata L.) grown on six major soil types of Bohol [Philippines]
1982
Alejan, T.A.
The results show that Faraon clay gave the highest yield for both varieties with 576.63 g/hill or 5.77 tons/ha for the purple variety and 573.03 g/hill or 5.73 tons/ha for the white variety. The purple variety had significantly higher values than the white variety in terms of N, P, K, Ca and Mg content. Highest amount of N and K taken up were observed in tubers from Bolinao clay, Ca and Mg from Faraon clay and P from Ubay clay
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