4005 East Glendale Road
Preston, ID 83263

tel: 406-827-3523
fax: 406-827-3543

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  •  Size: 14 x 40, 8 x 40, 30 x 60

  • Amendment: Amended with 2.5% nitrogen in the form of UAN32 (32% nitrogen - 50% urea - 50% ammonium nitrate)

  • Optional Amendment: Can be amended with ammonium sulfate or other ammonium sources or with composted products to be certified as organic.

  • Color: Medium to dark green in color

  • Holds up to 55% of its weight in water in the growth zone

  • Potassium: 3.5% potassium or 4.2% potash in the crystal lattice where it is not water soluble, but is plant accessible

  • Calcium: 1.6% that acts as a soil pH buffer

  • Porosity: High porosity

  • CEC: High CEC, typically 180 to 200 meq/100gram Up to 2% of the nitrogen is held in the crystal structure where it is not water soluble, but plant available

  • Surface Area: High surface area, 24.9 square meters/gram

  • Sodium: < 0.5% sodium; no water soluble sodium

  • Hydrophilic


·    Golf courses

·    High value crops

·    Lawns

·    Arid areas

·    Gardens

·    Row crops

·    Reclamation

·    Potting soils



  • Pre-test: Recommended that a 10 foot x 10 foot plot be tested to verify the required dosage

  • Method: Can be top dressed, drilled in, plowed in, side banded

  • Dosage: Typically 1 to 2.5 tons per acre but can be applied more heavily



  • Enhances fast and sustained growth

  • Reduces irrigation by up to 35%

  • Holds nitrogen and other nutrients in the growth zone

  • Increases infiltration and porosity

  • Increases aeration



  1. The site was reclaimed and planted in 1999.  No reseeding or fertilizing has been done since the original planting.

  2. In July of 2002 the five acre site was divided into two equal portions of two and one half acres each.
    In one half BRZ™ -14 + 40 was applied, the other half received BRZ™ -14 + 40 amended with nitrogen in the form of UAN32.

  3. The BRZ™ Zeolite was spread with a tractor using a three point hitch, PTO drive broadcast spreader at a rate of two and one half tons to the acre.

  4. The weather was hot and dry for approximately two weeks after the application of BRZ™ to the site.  Four tenths of an inch of rain fell in late July.  Within two weeks after the rain, the amended side of the site began to turn dark green and grow profusely.  The pictures in the paper “BRZ™ AMENDED ZEOLITE” were then taken on August 29th 2002 and show the difference in color and growth of the two halves of the site.

  5. The season remained hot and dry with precipitation as follows: 

July: 0.40 inches of rain
August: 2.05 inches of rain
September: 0.10 inches of rain
October: 0.30 inches of rain then subzero temperatures and 2 inches of snow.

  1. The dark green color remained until snow covered the site.  Some reduction in color was noticed; do to normal maturing and dormancy.

  2. No soil was imported to the site from off the premises.  All soil was borrowed from above the mill site, where it was dug from the side of the mountain on United States Antimony Corporation’s property.  A description of the soil would be: 75% C zone classification made up of fractured phylites from the Prichard Formation. C zone soils are composed of poorly sorted rock with no nutrient value; 15% is made up of B zone material.  This is the same material as C zone but broken down into a finer partical size; approximately 5% of the soil is made up of humus which is broken down pine forest material.



  1. Nothing further was done to the site in 2003.

  2. The grass appeared from its’ snow cover still green, appearing to have wintered well.

  3. It was obvious from the color and growth rate that the nutrient levels were sufficient.

  4. The difference between the side treated with the zeolite that was not amended and the side that the zeolite was amended with 3% N was absolutely dramatic, (refer to photo 2003). 

  5. Elk and deer feed on the new growth daily.  Their presents and preference was made obvious by droppings and tuffs of grass pulled up and not totally eaten.  By counting the manure piles it was clear that 90% of the animal activity took place on the amended side of the site.

  6. The grass turned brown and went to seed in mid July at the beginning of the regions hot dry period.  At this time it still appeared to have enough nutrients for propagation to ensure good growth in 2004.