Effect of Organic Matters on Growth and Yield of Elephant Foot Yam (Amorphophallus oncophyllus)

Abstract

Studies were conducted on effects of six organic matters (ricehull, black rice hull, corn cob, cow dung, coin peat and castor meal) mixed with soil at the rate of 2 tons/rai on growth and yield of elephant footyam during April to September 1991 at Kanchanaburi Research Station (ChongUa Site), Amphur Sangkhlaburi, Kanchanaburi Province. The results revealed that all organic matters had no significant effect on petiole length and diameter or tuber size of elephant foot yam, but significantly increased tuber weight and total yield. Use of cow dung resulted in the maximum tuber weight and the highest yield, followed in decreasing order by use of corn cob, castor meal, black rice hull, coir peat and rice hull while the control gave the minimum tuber weight and the lowest yield.