Fig. 6
From: A method to estimate plant density and plant spacing heterogeneity: application to wheat crops
a The optimal sampling size length (the horizontal solid lines, the length being indicated in cm) used in the FLS approach as a function of parameters a and b to get CV = 10% for the density estimation. b Idem as on the left but the sample is defined by the number of plants to be counted (the vertical solid lines with number of plants indicated) for the FNP approach. The gray dashed lines correspond to the actual plant density depending also on parameters a and b. The row spacing is assumed perfectly known and equal to 17.5 cm. The gray points represent the 14 plots measured