Large areas of saline soils, mainly belonging to the soda saline meadow type, are distributed in scattered spots in Sung-nun plain of Northeastern China. The soluble salts,predominantly sodium bicarbonate, are accumulated at the surface 20 to 40 cm. of the soil profile. A lime accumulation layer has been found at the depth of 40-100 cm.
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程伯容,王汝槦,马庆騄,罗旋.东北松嫩平原盐渍土的盐分累积[J].土壤学报,1963,11(1):19-24. P. Y. CHENG, L. Y. WANG, C. L. MA, S. LOU. SALT ACCUMULATION IN THE SOILS OF SUNG-NUN PLAIN, NORTHEASTERN CHINA[J]. Acta Pedologica Sinica,1963,11(1):19-24.