Erratum to: Precision Agric DOI 10.1007/s11119-013-9328-3

Unfortunately, Fig. 2 was incorrectly published as the two algorithms depicted were the same in the original publication of the article. The corrected Fig. 2 appears below.

Fig. 2
figure 2

Decision trees designed to delineate a standard (StdZ) or b top quality (TopZ) zones from the clusters defined by fuzzy k-means analysis. SP sampling point, MD membership degree, MT membership threshold, n number of cluster