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.
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Properly collecting soil samples is the most important step in any nutrient/soil amendment management program. Soil sampling should reflect tillage, past fertilizer/soil amendment placement, cropping patterns (and correcsponding irrigation requirements), soil type (including drainage and slope characteristics) and perhaps old field boundaries (such as old feed lots, windorws, altered stream beds, etc.). Trends toward reduced and/or zero tillage and technology for variable rate fertilization (VRF) have especially demanded that soil samples be taken more comprehensively and intensively for more accurate fertilizer and soil amendment application. This brochure will discuss the many methods used for taking an accurate soil sample using various methods and under several different types of tillage solutions.READ MORE
Understanding your soil analysis can be achieved with the basic soil test interpretation guide.READ MORE
Organic soils have some specific micronutrient problems, but with testing and more specific information about your sample(s), Midwest Laboratories will assist you in further interpretation.READ MORE