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Equipment required for the collection of a soil sample includes an auger, trowel,
bucket and soil sample box. (UAPB image)
PINE BLUFF, Ark. – A soil test is essential to maximize yields in gardens, says Dr.
Leonard Githinji, University of Arkansas at Pine Bluff Extension Program horticulture
A soil test reveals which nutrients are needed, in what quantities and whether or
not the soil pH should be corrected.
Soil sampling provides the most efficient use of nutrients thus maximizing fertilizer
and lime application dollars. Excess nutrients waste money and compromise the environment
through groundwater contamination, says Dr. Githinji. Careful soil testing and correction
insures that each crop gets exactly what it needs to grow and yield its full potential.
Tools needed for a sample collection include a clean bucket, a soil auger, a hand
trowel, a pen and a soil sample box that can be picked up at your nearest County Extension
office. Collect a representative sample by randomly collecting at least 25 soil cores
from each sample area using the soil auger. Using a hand trowel, mix the soil thoroughly
in a bucket to form what is called a composite sample that should represent no more
than 20 acres.
Place the composite sample in the soil box, include all requested details and either
mail or take to your nearest county Cooperative Extension office. They will send the
sample to a lab that specializes in nutrient analysis.
The soil lab report provides recommendations for nutrients and lime for pH correction.
Recommendations will be given in pounds per acre, which you must convert to pounds
of a manufacturer’s mixture. The county Extension agent can help you do so and also
suggest alternative fertilizer combinations that may match recommendations, which
could save you money.
Although soil sampling can be done at any time of year, Dr. Githinji suggests that
the ideal time to do so is about three months before planting. This allows time to
work the soil, adjust the soil pH and add any organic material if needed, he says.
For more information on soil sampling or help interpreting your soil sample results,
contact Dr. Githinji at
email@example.com or (870) 575-7224.
By Carol Sanders, writer/editorUAPB School of Agriculture, Fisheries and Human Sciences(870) 575-7238