is produced solely from sodium tetraborate pentahydrate, which is refined from the tincal ore found only in our Boron, California mine. As a result, the product is a sodium borate—free of calcium, which can cause boron deficiency in plants.
We refine Granubor 2 only through physical means:
The product is never treated with chemicals or other impurities or added ingredients, fillers, or coatings.
To help guarantee its optimal average particle size of 2.8 mm, Granubor 2
is screened between -4 and +14 mesh. With very few particles falling outside these values, the product has a uniform size distribution, similar to popular blends of prilled and granulated fertilizers. As a result, less segregation occurs during bagging, transport, and application.
Surface treatment with borate reduces degradation and dust content of Granubor 2.
The product has a particle strength of 9 lb (4.08 kg) per granule. And no other product has a dust content of less than 2,000 ppm.
The typical flow rate of Granubor 2
is 11 lb (4.99 kg) per minute, according to fertilizer industry standard EN 1235-1995. The product can be pneumatically transported, tipped, and conveyed.
Bulk density is 57 pounds/ft3
) loose or 60 pounds/ft3
) tight, with a 30° angle of repose.
is formulated to provide a slow release of boron, for long-lasting crop support during the all-important growing season.