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Sampling Volume Effects on Determining Salt in a Soil Profile
Author(s) -
Hassan H. M.,
Warrick A. W.,
AmoozegarFard A.
Publication year - 1983
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1983.03615995004700060040x
Subject(s) - chloride , sampling (signal processing) , volume (thermodynamics) , soil test , chemistry , salt (chemistry) , soil science , soil water , mineralogy , environmental science , hydrology (agriculture) , analytical chemistry (journal) , geology , environmental chemistry , physics , geotechnical engineering , organic chemistry , quantum mechanics , detector , optics
The effects of soil sampling volume for determining salt present were investigated in situ. Six 2.2‐m 2 plots were hand sprinkled over a 5‐d period with a total of 10 cm of water containing 1000 mg/L of chloride as CaCl 2 . Soil samples were taken at three locations within each plot at 10‐cm increments to 100 cm and at 20‐cm increments to the 160‐cm depth. Two different samplers, 7.9‐ and 2.1‐cm diameter, were used. The salt concentration was measured on a 2:1 extract. The measurements for the larger samples were less variable than the smaller samples. The coefficient of variability (CV) for the total chloride recovered was 8 and 14% for the large and small samples, respectively. In order to compare favorably to the known amount added, the effective radius of the sampling tool was critical. The CV for the chloride concentration calculated in the soil water ranged from 5 to 54% and 12 to 199% for large and small samples by depth.