@article{oai:kochi.repo.nii.ac.jp:00001662,
 author = {Katsutoshi, SAKURAI and Bunyarit, PURIYAKORN and Pornchai, PREECHAPANYA and Virat, TANPIBAL and Kanit, MUANGNIL and Buared, PRACHAIYO},
 issue = {2-3},
 journal = {熱帯研究, Tropics},
 month = {},
 note = {application/pdf},
 pages = {151--172},
 title = {Improvement of biological productivity in degraded lands in Thailand III. Soil hardness measurement in the field.},
 volume = {4},
 year = {1995}
}