Supporting nutrient availability with POLY4

Potassium and magnesium that are not stuck in soils

Calcium is a team player in the soil

Calcium improves the soil’s capacity to store and release important nutrients like potassium and magnesium, making them more available for plants to absorb.

Here’s how it works:

In soils cations held on the clay and organic matter particles can be exchanged by other cations. Exchange order depends on the electrical charge of the cations: Ca++ > Mg++ > K+. Calcium has a double positive charge, so it binds well to soil particles. It helps “push off” other cations stuck to soil, making them available for plant roots. This keeps nutrients moving and stops them from getting locked up, keeping them available for the plant to take up avoiding leaching.

Simplified schematic illustration of Ca++ displacing Mg++ and K+ on cation exchange sites

POLY4 moves more potassium and magnesium to the plant

In most cases Ca++ from POLY4 will be the dominant cation displacing K+ and Mg++ held on the soil particles, thus improving their availability to the plants.

POLY4 also works well on chalky soils with high pH (>7.0) that contain lots of Ca with free exchange sites. K from standard fertilizers like MOP and SOP will quickly lock to the free sites and become unavailable. Calcium-rich POLY4 reduces concentration gradients of K and Mg in soil solution, keeping more of K and Mg available for the plants.

And here's the evidence:

Unlocking potassium mobility with POLY4

2015

POLY4® is a trademark of Anglo American Woodsmith Limited.

Website by Askew Brook