Effect of twenty year-continuous applications of organic materials on the growth of crops and physicochemical properties of soil on andosol upland fields
2001
Katamine, M. (Tochigi-ken. Agricultural Experiment Station, Utsunomiya (Japan)) | Kamewada, K. | Suzuki, Y. | Ito, Y. | Nakayama, K. | Uchida, F.
This study was conducted for twenty years in Andsol upland fields, which cover over half of arable land in Tochigi pref. The cropping systems were cereals-barley and vegetables-wheat. The effect of application of organic materials (rice straw compost, cattle feces, pig manure, stem and leaf of dentocone, and wheat straw) on the yields of crops and the physicochemical properties of the soil were investigated. The available nitrogen content in the soil was significantly correlated with the amount of organic nitrogen applied, leading to increases in the yields of crops. The amount of nitrogen applied and the available phosphate in the soil showed similar effects. Therefore, the yields of crops from the plots treated with rice straw compost, cattle feces, pig manure and wheat straw were almost the same. However, the exchangeable cation content in the soil treated with rice straw compost was markedly higher than that for these other plots. The available phosphate content was lowest in the soil treated with cattle feces.
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