Solu-Cal
Soil pH Reducer
Targets
SOLU-CAL Sulfur MAXX
SOLU-CAL
products utilize cutting
edge
PHCA enhances the plant’s ability to convert
vital nutrients into an available form for plant
uptake and soil pH adjustment.
Lowering Soil pH with Sulfur on Turfgrass
Mode of Action:
Sulfur is oxidized by soil bacteria, thereby forming sulfuric acid which is the substance that
lowers soil pH. Warm temperatures, good moisture and mechanical aeration are required for
Sulfur oxidizing bacteria to function. Sulfur oxidation is minimal at soil temperatures less than
50ºF. Consequently, Sulfur oxidation in the winter can be limited. Sulfur that lies ‘dormant’ in
the winter will be oxidized when warmer temperatures occur. At 75ºF, the Sulfur oxidation rate
is approximately 1 5% of that at 85ºF. Applications are best made when temperatures are warm
enough for the bacteria to oxidize the Sulfur (70º - 85ºF), but not hot enough to accentuate
tissue burn.
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