In our country there have been recently found many localities where the crop plants revealed the symptoms of the deficiency in special elements beside three manureal elements.
According to the investigation of Ministry of Agriculture and Forestry, the Presume area of deficient in special elements was found 500, 000 hectares in the total, the area, deficient in magnesium, was found the largest, 240, 000 hectares in total, and it was followed by those, deficient in boron or silicium respectively in the order. These presume areas have been expected to increase their number after the more precise investigation.
In relation to the amelioration of these soils, various materials have been proposed to be applied, but they have had always more or less defects in their quality. In order to get rid of these defects the author made studies, here reported, on various factors and conditions, by which several fertilizer were prepared. As to this preparation a special consideration was paid in supplying the special elements from the domestic resources, of no utility.
It is the major objective of this research to promote the development of new markets for coal minerals in the domestic coal (Montmorillonite-chlorite=Na-K-Ca-Mg-Al-Si-O-OH-H
2O=ASTM card No.12-231, Halloysite hydrated=Al
2Si
2O
5 (OH)
4·2H
2O=ASTM card No.9-451, Kaolinite=Al
2Si
2O
5 (OH)
4=ASTM card No.14-164) and serpentine (Deweylite= (Mg, Fe)
3 (Si, Al)
3O
7 (OH)
4·4H
2O=ASTM card No.13-532, serpentine=Mg
3Si
2O
5 (OH)
4=ASTM card No.9-444, Aluminian serpentine=Mg-Al-Si-Al-O-OH=ASTM card No.12-583) in Japan and to advance its use in the existing markets.
Many different research projects have been undertaken to accomplish these aims.
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