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Soil sample
Plow depth or the plow zone is the layer most commonly sampled for soil fertility evaluation. The plow zone is the layer of greatest activity in the soil, and correctly evaluating the properties of this layer go far in predicting fertilizer requirements. Lower horizons in the soil are important too, but they do not change much from one year to another. If basic information is available relative to characteristics of the soil from the plow depths usually will suffice for soil fertility purposes. To obtain a representative sample of a given area of soil, a large number of cores or sub samples must be taken. For most cultivated fields, each composite sample should consist of a minimum of 8-10 cores About 500grams of soil is needed for a routine analysis.
Avoid damaged leaves (insect, disease, mechanical). Abnormal-appearing trees should be avoided. Young or senescent leaves should be avoided. When sampling plants with suspected nutrient deficiencies, take two samples, one from the normal plants and one from the abnormal plants.
Water Sample
Run the water for at least 5 minutes before collecting the sample. Collect 1 litre of sample in a clean bottle.
Complete the Sample submission form as accurately as possible. The more complete the questionnaire is filled out the better the interpretation and recommendation will be.
If you have any questions about sampling procedures, contact:
