University of California
Los Angeles County
Below are examples of soil fertility maps of High Desert fields created with grid sampling.
NOTE: Maps A and B show a 90.8 acre onion field. Map C shows a 234.4 acre alfalfa field. Map D shows a 58.1 acre onion field.
Map A: Phosphorus

Map B: Potassium

Map C: Phosphorus

Map D: Potassium

Agriculture and Natural Resources, University of California
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