Relationship between cation-exchange capacity and degree of maturity of city refuse composts |
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Authors: | Yasuo Harada Akio Inoko |
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Institution: | Soil Fertility Division , National Institute of Agricultural Sciences , Yatabe, Tsukuba, Ibaraki , 305 , Japan |
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Abstract: | Abstract An attempt was made to estimate the degree of maturity of city refuse composts by measuring their cation-exchange capacity (CEC). The CEC of the city refuse compost increased for the first 7 days after commencement of the fermentation process, decreased for the next 2 days, and then increased again gradually up to the end of the piling period. A highly significant negative correlation was noted between the CEC and C/N ratio of the city refuse composts (r=-0.903***). Regression analysis yielded the relationship: In CEC=7.02-1.02 In C/N The CEC values of the city refuse composts, which were considered to have been sufficiently matured for application, were greater than about 60 me/ 100 g of ash-free material. |
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Keywords: | compost city refuse degree of maturity cation-exchange capacity |
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