@article{oai:soar-ir.repo.nii.ac.jp:00010815,
 author = {大槻,  貞男},
 issue = {1},
 journal = {信州大学農学部紀要},
 month = {Jun},
 note = {A soil survey of paddy and upland field had been carried out for seven years from 1967 to 1973 in Minowa twon, which was held due to the designation of a soil survey based on the law of national land survey. In this analysis of physico-chemical compositions on paddy soil and upland soil, the author gained the major results and those countermeasures toward the soil improvement of this area. They will be summarized as follows. In both the eastern and western areas, the diluvial upland soil showed acid reaction, and contents of available phosphate, exchangeable calcium and magnesium were a little, but the phosphate absorption coefficient was exceedingly high. In the eastern diluvial upland soil, humus content was especially a little. While in the western diluvial upland soil, the content of available phosphate was especially a little. In the diluvial paddy soil. and alluvial paddy soil in both areas, generally the contents of exchangeable calcium and magnesium were a little. In the diluvial paddy soil of the western area, the available phosphate was very a little, the phosphate absorption coefficient was exceedingly high, and the bulk density was low in the western alluvial paddy soil. While in the paddy soil of the eastern area, humus content and cation exchangeable capacity were especially low and the content of calcium in alluvial paddy soil was especially a little. On the countermeasures toward the improvement of the soil in both areas. In the diluvial upland soil of both areas, the author need to correct to the pH (H₂O) 6.0-7.0 and adjust the Ca/Mg ratio to below 10. Furthermore, it is important to utilize enough humus, phosphate, and silicate to improve physico- chemical properties of the soil. And in the alluvial paddy soil of the eastern area, application of humus and calcium are necessary. In the diluvial paddy soil of the western area, application of phosphate will be especially effective. After all deep plowing will be necessary from the view point of soil improvement., Article, 信州大学農学部紀要 13(1): 99-118(1976)},
 pages = {99--118},
 title = {箕輪町の土壌},
 volume = {13},
 year = {1976}
}