![]() ![]() Yet you don’t want to ignore that extra 10% to 20% well of nutrients available in the subsoil. This makes perfect sense, as 80% to 90% of nutrient uptake occurs at this level, and is the depth where fertilizer is applied. When most growers do soil sampling, they collect at depths up to 6”. There may be plant accessible nutrients deep in the soil ![]() Testing those underperforming areas can also identify other issues that may be affecting production – such as a micronutrient deficiency, or concerns around pH, salts or sodium.Ģ. But for a more accurate picture it’s important to test – not guess. Nutrient removal charts (like the one below) can give you a ballpark estimate. Conversely, in underperforming areas, unused nutrients will often be available to this season’s crop. Nutrients will generally be more depleted in parts of the field where you achieved high yield the previous season. Test both high performing and low performing areas. The trick is in knowing where to sample and how many samples are required to give you an accurate representation. Soil sampling is meant to give you a representative picture of your soil makeup. Nutrient levels are not uniform across your fields Let’s look at some potential sources of hidden nutrients.įour reasons soil testing can uncover hidden nutrients:ġ. This knowledge can help you tailor your fertility program to determine which fields need a top-up – and which need a nutrient refill. While yield levels and uptake & removal charts can certainly help, the surest and most accurate way to understand the soil profile is through a soil testing program. Growers are often surprised to learn that they may have higher nutrient and micronutrient levels in their soil than they thought. It’s not a windfall, but it’s nothing to sneeze at. How strategic soil testing can help you get the most value from nutrients in your soilĭiscovering existing sources of plant-available nutrient is like finding a $20 bill in your jeans… money you never knew you had. ![]()
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