nutri-sul 90


guaranteed analysis


Attention: Sulfur dust in air may explode. Do not air convey.

Explosive Limits in Air:
Upper 35 Gr. per Cu. M.
Lower 1400 Gr. Per Cu. M.

Available Phosphate (P2O5)5.00%
Soluble Potash (K2O)10.00%

Sulfur ignites easily — eliminate all sources of ignition.
Net weight 50 lbs.

When this sulphur is applied to soils it is attacked by soil microorganisms to form sulphuric acid. This sulphuric acid in turn supplies the sulphate ion which is taken up by the plant. The acidifying effect of sulphur oxidation in the soil lowers the soil pH and allows uptake of soil nutrients and particularly iron.

We recommend injection of this material directly into the soil as the speed of oxidation to sulphuric acid depends mainly on the extent of contact between sulphur and the soil. Injection on a grid allows for fine division and wide dispersion into the soil.

Mixing recommendations — per 100 gallons

Soil pH Sandy Soil Clay Soil
7.5 5 lb. 8 lb.
8 7 lb. 10 lb.
8.5 12 lb. 15 lb.

Research has shown that unobstructed tree feeder roots tend to be in the top 6″ of soil. Therefore we recommend that the probe or hydraulic needle be inserted no deeper.

Injections should be every 2-1/2 feet square on a grid starting approximately five feet from the trunk and extending beyond the drip line. A site judgment and/or a core sample can be made to determine extent of roots.