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Soil texture can be estimated from the cation exchange capacity, however for a more accurate determination, run a soil texture by hydrometer.READ MORE
Taking soil samples can be made easier by lubrication of the probe, especially for wet soils and high clay content soils. The soil can stick to the probe and stop the soil from being released from the probe or make it difficult for the probe to take up soil in the first place. The result of which is a poor sample being taken that does not represent the intended depth from compressing the soil down instead of sliding up into the probe. Research studies performed at different universities have shown no significant effect on soil sample data for macro and micronutrients from lubricating soil probes with WD-40 or cooking spray. Additional investigation performed by Midwest Labs agrees with this.READ MORE
This memo explains how the salt index is measured and how to interpret these values when compared to common fertilizer products.READ MORE