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| a granule of standard muriate of potash fertilizer (KCl) dropped in a cup of water will quickly dissolve.
The same granule of MOP left on the soil surface, broadcast and incorporated with tillage or banded 2x2 will dissolve quickly during significant rainfall or irrigation events.
The amount of freshly applied K fertilizer acquired by subsequent crops depends on lots of factors as described in my previous post but the solubility of granules of MOP is not a limiting factor.
Soil CEC and exchangeable K and other cation levels are much more important.
In soils with high levels of exchangeable K, the K in recently applied fertilizer normally constitutes a small fraction of the total plant available K within the root zone and thus normally contributes a small fraction of the K acquired.
the main mechanism that moves K to root surfaces is diffusion.
http://www.spectrumanalytic.com/support/library/ff/The_Nutrient_Upt...
Joel
WIU Agriculture | |
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Potash???
