@article{oai:u-ryukyu.repo.nii.ac.jp:02006787,
 author = {鎮西, 忠茂 and Chinzei, Tadashige},
 issue = {5},
 journal = {琉球大学農家政工学部学術報告, The science bulletin of the Division of Agriculture, Home Economics & Engineering, University of the Ryukyus},
 month = {Dec},
 note = {1. Ninety three soil samples from thirty localities in central Okinawa were taken and tested by the Spurway Soil Test Method for the same purpose as in the previous reports. (1, 2) 2. Magnesium was contained moderately high in most samples except ones from two localities, so there is little possibility of magnesium deficiency. 3. In the soluble iron, most soil samples gave low test results which indicate the possibility of iron deficiency. 4. Many samples gave low test results in manganese which indicate the possibility of manganese deficiency for plants. 5. Tests for sulfates (SO_4^<-->) were negative in all of the soil samples. This indicates SO_4^<--> content is below toxic level. 6. Tests of other than the above elements were also made and the results are summarized as follows: a) NO_3^- and NH_4 content are generally low in most samples. b) Phosphorus content in most soil samples was very low and many of them gave less than 1 ppm by the reserve tests. c) Potassium content was generally high in most soil samples. d) Ca^<++> content was very high except samples from seven localities. e) Al^<+++>, Cl^- and NO_2^- were all below toxic levels. 7. Elements other than the above were not tested because the Spurway Soil Test Kit does not have such testing method., 紀要論文},
 pages = {135--147},
 title = {琉球産土壌の微量要素に関する研究　1. Spurway Soil Test Kit による予備試験 6. 沖縄島中部産土壌},
 year = {1958}
}