Phosphorus sorption by major agricultural soils of Alaska1
作者:
C.L. Ping,
G.J. Michaelson,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1986)
卷期:
Volume 17,
issue 3
页码: 299-320
ISSN:0010-3624
年代: 1986
DOI:10.1080/00103628609367714
出版商: Taylor & Francis Group
关键词: sorption maxima;extractable Al and Fe;phosphorus fractionation;volcanic ash;loess
数据来源: Taylor
摘要:
Surface soils from ten soil series representing five great groups were collected from Alaska. These soils were selected from the important agricultural areas covering a wide geographic distribution. These soils can be divided into two distinct groups based on their parent material: loess and volcanic ash. Phosphorus sorption maxima were calculated based on the Langmuir isotherms. The volcanic ash soils (Cryandept and Cryorthods) showed an average P‐sorption maxima of 10,122 mg/kg and loess soils averaged 3,934 mg/kg. Both groups have similar portions of phosphorus in the organic form (19%) and occluded form (8 to 9%). The nonoccluded‐P in the volcanic ash soils and the loess soils was 68% and 43% respectively, and the Calcium‐P was 4% and 29% respectively.
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