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Mallarino, A.P., Barbagelata, P.A., Clover, M.W., Villavicencio, C.X. and Thompson, L.B. (2011) Factors Determining High Temporal Soil-Test Potassium Variation and Soil Sampling and Testing Alternatives. Proceedings of the North Central Region Soil and Plant Analyst Workshop, Bettendorf, IA, 23-24 February 2011, 3-14.

has been cited by the following article:

• TITLE: Evaluation of Soil Potassium Test to Improve Fertilizer Recommendations for Corn

  AUTHORS: Manbir K. Rakkar, David W. Franzen, Amitava Chatterjee

  KEYWORDS: Potassium, Soil Test Methodology, Fertilizer Recommendations, Grain Yield

  JOURNAL NAME: Open Journal of Soil Science, Vol.5 No.5, May 28, 2015

  ABSTRACT: The soil potassium (K) test methodology is under increased evaluation due to the soil sample drying effect, temporal variations of test results and inconsistent crop response to applied K fertilizers. Ten on-farm trials were conducted in 2014 in eastern North Dakota to determine the corn response to different K-fertilizer rates and to assess the variation of soil K test levels between air-dried (KDry) and field moist (KMoist) soil samples during the corn growing season. Significant differences were observed between KDry and KMoist soil K test results. The ratio of KDry/KMoist showed high correlation with cation exchange capacity (r = 0.63, p