This article deals with the structural characteristics of the fertile paddy soils in the southern region of Kiangsu province. Pre liminary experiments show that the bulk density of the arable soil-layer in wheat-planting season attains<1.20 gm.cm-3,total soil porosity<55% (V),non-capillary porosity>5% (V),compressive strength of airdry soilclods 26-30 kg·cm-2. The correlation between the compressive. strength of soil clods and the quantity of the clay particles(<0.001mm) on the one hand and the physical clay particles on the other is significantly positive,while the quantity of non-capillary porosity is negative. The correlation between the compressive strength and quantity of organic matter and total porosity of soils is nonsignificant.
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姚贤良,赵渭生,于德芬,许绣云.高产水稻土结构特性的初步研究[J].土壤学报,1978,15(1):1-12. Yao Hsian-liang, Chao Wei-sheng, Yu Teh-fen, Hsu Hsiu-yun. PRELIMINARY INVESTIGATION OF STRUCTURAL CHARACTERISTICS OF FERTILE PADDY SOILS[J]. Acta Pedologica Sinica,1978,15(1):1-12.