The effect of green ash cm the total yield and each yield component of rice was studied at highly Leaky paddy field. In addition, this effect of green ash was compared with that of Si-Mg-Ca fertilizer or lime.
Experimental treatments included different levels and kinds of fertilizers such as 75 ㎏, per 10 are of Si-Mg-Ca fertilizer, 150 ㎏, of Ca and 75 ㎏., 150 ㎏., 225 ㎏., 300 ㎏., 375 ㎏. and 450 ㎏. of green ash with non-fertilized plot so called control, Paltal is the name of variety used.
The results showed as follows ;
1) There is a tendency that the use of green ash, Si-Mg-Ca fertilizer and lime does not only stimulate the growth but increase yield in comparison with that of control. This increases in yield, mainly depends on the higher maturing rate, caused by these fertilizer applications.
2) In proportion to the total balk of green ash, yield showed getting higher. But excessed the level of 300 ㎏. per 10 are, significantly higher yield was not observed any more.
This result is similar to that of Si-Mg-Ca fertilizer used plot. When green ash level reaches to 225 ㎏., are, is gives as high yield as that of Capit-fertilizer plot.
3) Thus the most adequate level of green ash application stands at about 300 ㎏. per are.
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