Soil acidity and liming. II. Evaluation of using aluminum extracted by various chloride salts for determining lime requirements

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Soil Sci. Soc. Am. J.; (United States)

DOI:https://doi.org/10.2136/sssaj1983.03615995004700040017x· OSTI ID:6731723

Oates, K M; Kamprath, E J

Neutralization of soil Al to a minimum value is one approach to liming acid soils. The objective of this study was to determine which chloride extracting solution removed the quantity of soil Al that readily reacts with limestone and reduces the Al saturation to < 15%. Soils were incubated for 8 weeks after being limed at rates needed to neutralize the Al removed by KCl, LaCl/sub 3/, and CuCl/sub 2/. Six soils with a range in organic matter contents were used. When the Al extracted by KCl was used to predict the lime rate, soils containing organic matter had a large amount of residual KCl-extractable Al and a soil pH below 5.0. The lime rate predicted by the Al removed with LaCl/sub 3/ reduced the residual Al to < 15% Al saturation for all soils. If residual Al is the criterion for evaluating limed soiled, then LaCl/sub 3/ is the best extracting solution. The LaCl/sub 3/ not only removes the same amount of Al as KCl from the clay fraction of the soil, but also removes organically bound Al that influences the soil solution Al.

• Research Organization: North Carolina State Univ., Raleigh
• OSTI ID: 6731723
• Journal Information: Soil Sci. Soc. Am. J.; (United States), Vol. 47
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALUMINIUM
CHEMICAL REACTIONS
EXTRACTION
COPPER CHLORIDES
LANTHANUM CHLORIDES
POTASSIUM CHLORIDES
SOILS
LIMING
PH VALUE
REACTION KINETICS
ALKALI METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
COPPER COMPOUNDS
COPPER HALIDES
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
KINETICS
LANTHANUM COMPOUNDS
METALS
POTASSIUM COMPOUNDS
RARE EARTH COMPOUNDS
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
510200* - Environment
Terrestrial- Chemicals Monitoring &amp; Transport- (-1989)