We’ve talked a lot on the LIFT blog about why increasing phosphorus uptake and efficiency is important, and how to do it.
A great strategy to improve the amount of available phosphorus is to use a chelating agent like Levesol™ with your in-furrow fertilizer program to unlock phosphorus in the soil and fertilizer. But does this really increase phosphorus uptake by an appreciable amount and what impact does this have on crop yield?
Research from Dr. Dorivar Ruiz Diaz, associate professor in Soil Fertility and Nutrient Management at Kansas State University indicated that an in-furrow fertilizer application when combined with an application of Levesol related to increased yield in his trial.
Steve Roehl, research and product analyst with West Central Distribution, presented on this topic during the LIFT Summit in 2015. Check out this video where he breaks down the research findings:
Quantifying Phosphorus Uptake Transcript:
Here’s some work from Dr. Ruiz Diaz. He added a 9-18-9 and a 10-34-0 to the soil with and without Levesol. The untreated check – we’re talking about the amount of phosphorus getting to the ear leaf – when you add the P-based starter, this would be indicative of just the in-furrow placement. This is the advantage of in-furrow.
These two phosphorus sources give us a 14.4% increase in ear leaf P. By merely adding Levesol, this nutrient availability amendment, we get another 10.2% increase in phosphorus to the ear leaf.
Dr. Ruiz Diaz took it a step further and he looked at the P205 in the grain. Dr. Below said more phosphorus to the grain more than likely has the opportunity to result in higher yield.
This is interesting too, because if you look at the same comparisons, the P-based fertilizer alone representing the advantage to in-furrow fertilizer provided a 6% increase of phosphorus to the corn grain.
The addition of Levesol to the p-based fertilizers doubled that another 6.9% increase. To Dr. Below’s suggestion that it has a relationship to yield, in this particular test, yes it did.
The addition of P-based starter fertilizers alone is 17 bushel. That’s low hanging fruit, but there is another full nine bushel there based on the data Dr. Ruiz Diaz showed by providing better mobility of phosphorus into and throughout the plant to result in greater yield.