caa a22 4500 469032081 CHVBK 20180323132746.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF02664543 doi (NATIONALLICENCE)springer-10.1007/BF02664543 Xiao Duning Institute of Applied Ecology, Chinese Academy of Sciences, 110015, Shenyang, PRC aut Alfisols and closely related soils in China [Elektronische Daten] [Duning Xiao] Alfisols are important soils in China. They occupy about 1.25 million km2, or about 13% of the land area. In the current Chinese system of soil classification, burozem, yellow-brown earths, Baijiang (Planosol) soils and parts of drab soils. They are mostly forested soils with an estimated 5-13 t/ha · yr of organic matter returned to the soils from temperate mixed conifer and broad-leaved forest. In terms of elemental bio-cycling, Ca is prominent. In a comparison of 30 profiles the average ratio of clay (B/ A) was 1.47 for Cryoboralfs and Eutroboralfs; 1.88 for Hapludaifs and 2.53 for Paleudalfs. From Eutroboralfs to Paleudalfs the average gain (or loss) in clay during soil development is about a factor of seven. The moisture regimes vary considerably between Hapludalfs, Cryoboralfs, and associated Cryaquepts, but the amount of water is always enough to cause significant leaching. In the weathering, and pedogenesis processes TiO2, MgO and Fe2O3 are accumulated, respectively, in both A and B Δ horizons; but SiO2 and Al2O3 tend to be leached from the solum. Science Press, 1992 alfisols nationallicence distribution nationallicence classification nationallicence Chinese Geographical Science Science Press 2/1(1992-03-01), 18-29 1002-0063 2:1<18 1992 2 11769 https://doi.org/10.1007/BF02664543 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02664543 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Xiao Duning Institute of Applied Ecology, Chinese Academy of Sciences, 110015, Shenyang, PRC aut NATIONALLICENCE 773 0- Chinese Geographical Science Science Press 2/1(1992-03-01), 18-29 1002-0063 2:1<18 1992 2 11769 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer