Soil Na+ Kit W/30 Samples

Spectrum Soil Na+ Kit W/30 Samples for use with Cardy Potassium Na+ Meter. Collect at least 15 to 20 core samples from an area not exceeding ten acres by using a Z pattern. Areas having different soil types or management histories should be sampled separately. Sample the top 12 inches of soil. Some universities recommend sampling the top 24 inches in 12-inch increments. Contact your county extension agent for recommendations. Care should be taken to ensure that the soil samples are not biased by the presence of rows or bands of fertilizer.