Reduce fertilizers, increase yields with sap analysis


What if you could reduce your nitrogen (N) and potassium (K) applications – by 30-70% – while increasing crop yields and health? This is what John Kempf discovered while managing nutrition correctly on many of the farms he works with, thanks to the analysis of plant sap.

The owner and founder of Advanced Eco Agriculture (AEA), a specialist plant nutrition and organic crop and nutrition consultancy, turned to plant sap analysis after being frustrated that the results of the dry matter based fabrics did not match what he was seeing in the field. After trying the analysis of plant sap, he quickly discovered that this new nutrient analysis technology from the Netherlands provided a much more accurate picture of what was going on inside the crops and could save money. to growers thousands of dollars in fertilizer costs.

Analysis of plant sap 101

Analyzing plant sap is similar to sampling tissue in that growers must collect the leaves of the plant. However, Kempf explains that they have to take fresh leaves from two places: a young, fully mature leaf on the plant – as for a tissue test – and an older leaf that is still green and photosynthesizing.

“It is very important to take samples from two places and measure them separately because, as we all know, nitrogen and potassium in particular, as well as several other elements, are very mobile,” says Kempf. “They move around the factory very quickly. And when the plant starts to feel low levels of nitrogen or potassium, it pulls it out from the bottom …


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