Soil Sampling for Soybean Cyst Nematode

Post-harvest is an ideal time to sample fields for both soil fertility and soybean cyst nematode (SCN). Yield loss is a primary symptom of SCN and can occur with or without visual symptoms.

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Soil sampling procedure for SCN include the following:

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  • Collect 8-inch long soil cores, preferably from underneath the crop row if soybean were grown this year.
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  • Collect 15 to 20 soil cores in a “zigzag�? manner throughout the sampling grid. If possible, limit to 20 acres per composite sample.
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  • If grid sampling, collect one or two soil cores from every grid cell and combine cores from the number of cells that represent approximately 20 acres.
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  • Do not collect samples if the soil is muddy or frozen.
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If not delivered promptly to a testing facility, store the samples in a cool area, away from heat and sunlight. Do not air dry the samples.