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Soil Sampling by Grid Versus University of Tennessee Standard Recommendations

Hubert J. Savoy, Mike Smith, Dean Northcutt, John Wilkerson and Michael Palmer


 
ABSTRACT

Three sites were soil sampled by each of three different soil sampling strategies (1) standard University of Tennessee approach, (2) Grid Center approach, (3) Grid Point approach. Different results were obtained from each of the sampling strategies. Results differed both in extent of area found in each soil test interpretation category and in the geographic location in the field where specific soil test categories occur. All sites were found to be fairly uniform (high or medium testing) in P and K by any of the soil sampling strategies. Soil pH appeared to vary more than P and K, with grid sampling techniques identifying some areas at each of the three sites having pH values much lower and potentially yield limiting than the field average. Fertilizer or lime needs were both increased and decreased by the use of grid sampling strategies.



Reprinted from Proceedings of the 1997 Beltwide Cotton Conferences pp. 648 - 649
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998