果樹園의 肥沃度에 關한 硏究 (Ⅲ) : 포도園土壤의 鑛物學的 硏究 Mineralogical Studies of Vine Cultured Soil = Studies on the Fertility of Orchards (Ⅲ)

다국어 초록 (Multilingual Abstract)

The fine sand and clay minerals of the twenty-two subsoil samples taken from vine orchards in the province of Kyungsangbukdo, Korea are studied in relation to fertility. Mineralogical compositions of fine sand fraction (less than 0.2mm) and clay fraction (less than 2 micron) are examined by chemical analyses, mineral microscope, and X-ray diffraction method.
The outline of results are as follows:
(1) In almost all the samples sand is dominant, and average pH is 4.70 ; average humus, 0.63% ; average C. E. C., 7.17 me/100g ; degree of base saturation, 69.60%.
(2) The principal primary minerals are plagioclase, alkali-feldspar, hornblende, muscovite and biotite. All the samples contain an appreciable amount of quartz, and they also contain very small quantity of plant opal, volcanic glass, and heavy minerals.
(3) Primary minerals are mainly derived from weathering products of granite, granodiorite or arkose.
(4) clay minerals are mainly consisted of 14? minerals, illite, kaolin minerals, gibbsite, critohalite and chlorite, and as for 14? minerals, Al-interlayered minerals are dominant. In all soils, dioctahedral 2 : 1 type mineral is dominant.
(5) There are hardly correlation between the quantity of kaolin minerals and grape yields.

목차 (Table of Contents)

• Ⅰ. 序 論
• Ⅱ. 實驗方法
• 1. 供試土壤
• 2. 理化學的分析
• 3. 一次鑛物
• 4. 二次鑛物
• Ⅲ. 實驗結果 및 考察
• 1. 供試土壤의 理化學的性質
• 2. 細沙中의 一次鑛物組織
• 3. 粘土鑛物組織
• 4. 粘土鑛物의 組成과 生産性
• Ⅳ. 結 論