Soil Sampling Procedures
Sampling areas should be grouped according to some common denominator such as management zones, irrigation zones, soil types, plant types, plant varieties, topography, etc.
The sample should consist of a random composite sample of the sampling area.
If diagnosing a problem, the soil should be taken exclusively from the problem area(s).
Each sample submitted for testing should consist of soil taken from the root zone of the plants being grown from 5–6 different locations within the area to be tested.
Due to possible contamination, the surface 1–2” should not be included in the sample.
Any areas that are exhibiting problems or have been managed differently should be treated as separate sampling areas.
How to Label Samples
Each sample should be labeled on the OUTSIDE of the bag with the identification that will best identify it for your purposes. Please be brief in the labeling.
Sample volume & shipping
Each sample should consist of one quart or one liter of soil.
Samples should be shipped in plastic bags, such as zip-lock type bags, inside a mailing envelope or box.