Yields of root vegetables and soil chemical characteristics in sandy-field
1990
Fujii, N. (Hyogo-ken. Agricultural Inst., Kasai (Japan)) | Tutaka, T. | Aoyama, Y. | Ohshima, T.
This paper presents the relation between yields of carrot and radish and the soil characteristics at 18 fields in Mitu-cho Ibo-gun. Mitu-cho was one of the typical vegetable habitats with sandy field in Hyogo prefecture. 1) In this area, soil dressing of sea sand has given in every few years. It supplies calcium, and makes the accumulated nutrients' level lower. The chemical characteristics of the sandy-soil in this area were high pH, low CEC, high accumulation of soil available phosphate, and low contents of magnesium and potassium. 2) In extreme high pH or low pH condition, the carrot yield decreased and on the other hand in high CEC condition it increased. 3) The radish yield depended upon soil pH as the case of carrot, but we couldn't recognize the relation between CEC and them. Radish absorbed a lot of potassium and nitrogen, so we found the importance of these elements in radish growing. Radish yields showed negative correlation to nitrogen, phosphate and magnesium. 4) From these results, we found that in this area organic matter application and soil dressing of fine sea sand were effective to increase yields of root vegetables. The former will supply available nitrogen, and the latter will increase CEC. At the same time we recognized the necessity of magnesium and potassium supply from absorbed nutrients' quantity and balance of soil exchangeable base
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