Effect of sample placement on the geostatistical analysis of the spatial distribution of Lygus hesperus (Heteroptera: Miridae) in lentils
1990
Schotzko, D.J. | O'Keeffe, L.E.
The effect of sample placement on the summary statisticsand geostatistical analysis of the spatial distribution of Lygus hesperus Knight inlentils, Lens culinaris Medik., was evaluated for 10 stratified and three random sampling patternsfor two adult and two nymphal distributions. Geostatistics uses spatial variation todetermine the degree of association and dependence of spatially related data. All subsampling patterns accurately estimated the mean of these distributions. The hexagonal sampling patternprovided the best estimates of the spatial structure, whereas the random samplingpatterns were least effective at estimating spatial structure. The smaller the number of samples,the lower the accuracy and reliability of the spatial structure. The minimum number ofsamples for these data would be between 35 and 100 samples, depending on the type ofspatial structure and localized discontinuity. The higher the localized discontinuity and proportion of randomness, the greater the number of samples required to estimate the spatial structure.
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