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Some Factors Affecting Soil Sampling
Author(s) -
Welch C. D.,
Fitts J. W.
Publication year - 1956
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/sssaj1956.03615995002000010013x
Subject(s) - organic matter , potassium , phosphorus , soil test , significant difference , soil organic matter , environmental science , agronomy , soil ph , chemistry , soil water , soil science , environmental chemistry , mathematics , biology , statistics , organic chemistry
A study was conducted to obtain information as to the effects of tools used and depth of sampling on results of soil analysis. All samples were analyzed for pH, phosphorus, potassium, and organic. matter. Some of the principle findings were as follows: There was no significant difference between results of analysis for samples collected with a tube, spade, or trowel. The pH and organic matter values were significantly lower for samples collected with the auger as compared to the other tools. There was no significant difference between analyses for duplicate samples collected in a bucket. There was a significant decrease in the pH of soil with depth from the 0 to 3 to the 3 to 6 to the 6 to 9 inch layers of soil in fields seeded to sod crops. The difference was not significant for comparable fields used for row crops. The amount of phosphorus, potassium and organic matter decreased with depth in fields used for sod crops as well as those in row crops. The soil analyses results for pH, phosphorus, and potassium and organic matter were significantly lower for samples composited from 0 to 6‐inch cores as compared to 0 to 3‐inch cores for fields in sod crops in the Coastal Plains as well as the Piedmont and Mountains. Samples from 0 to 6‐inch cores in fields used for row crops showed significantly lower results than those from 0 to 3‐inches for pH, potassium, and organic matter in the Piedmont and Mountains but only for organic matter in the Coastal Plains.