N-pHURIC fertilizers combine the benefits of both urea and sulfuric acid while virtually eliminating the undesirable characteristics of using sulfuric acid alone.

Most nitrogen fertilizers contain ammonic nitrogen, e.g. NH3, ammonium nitrate, sulfate, UAN 32, urea, etc. Eventually ammonic nitrogen is converted to nitrate with a net soil acidification. However, conventional nitrogen fertilizers during intermediate steps in the mineralization process can release free ammonia, especially under alkaline or calcareous soil conditions.

The benefits of sulfuric acid for amending alkaline and saline calcareous soils have been well documented and widely recognized. This is especially true in agricultural areas of the southwestern U.S. Use of sulfuric acid, however, has been severely restricted because of extreme hazard to both human tissue and equipment.

There are three patented N-pHURIC formulations that have no loss of acidity, but no longer instantly destroy human tissue.

The carefully controlled manufacturing process results in contaminant-free, stable material. This quality control is agronomically critical to assure that N-pHURIC retains all of the acidity and has no phytotoxic contaminates. (NOTE: Under no circumstances should these materials be mixed in the field.)

N-pHURIC Combinations, Phos-pHurics and N-P-K-phurics:

A limited number of materials are compatible with the various N-pHURIC formulations, including blends of phosphoric acid, ammonium phosphate solutions (10-34-0, etc.) and several other micronutrients, including zinc and iron. These are called Phos-pHurics, and when potash is added they are known as N-P-K-phurics.

All of these formulations should be discussed with your agricultural chemical field representative, consulting agronomist, or the technical service department of Agrium before attempting to make such products.

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