Size: 8 x 40,14 x 40, -40
Potassium: 3.5% (plant
available but not water soluble)
Calcium:1.6% which is a pH
buffer and plant nutrient
Sodium: <0.5% (none water
BRZ™ has been used extensively for the
development of golf course greens. It is an
excellent soil amendment for sports fields,
commons areas, parks, lawns, gardens, for any
sandy soils, and for higher value crops such as
vegetables, fruits, potatoes, alfalfa, etc.
For the construction of new golf course greens
and tees, lawns, gardens, or for sandy soils
replace 10 to 20 % of the sand with an equal
volume of BRZ™. This should be applied in the
top 2 to 4 inches. For top dressing,
approximately 30 to 60 pounds should be applied
per 1,000 square feet or 1,200 to 2,500 pounds
per acre. To enhance aerification after
plugging, apply 60 to 150 pounds per 1,000
square feet or 2,500 to 6,500 pounds per acre.
For crops and grasses successful improvements
have been realized with as little as 1 ton per
acre. Generally, 2 to 10 tons per acre are
applied depending on the composition of the soil
being treated. BRZ™ can be spread by hand
broadcasting, using a manure spreader, or by
other devices. Although top dressing works,
generally it is better to mix the BRZ™ in the
top 2 to 4 inches with a roto-tiller, spike
tooth harrow, or a disc harrow. Plowing BRZ™ in,
places it deeper than necessary. For row crops
such as corn or soybeans, BRZ™ can be applied
with a side disc or by side banding. After
application, the area must be irrigated, because
fresh BRZ™ will absorb moisture from the
surrounding soil and can result in dehydration
of the plants or grasses.
BRZ™ has two methods of holding fluids and plant
nutrients. The first is by "absorption". It will
absorb up to 55 % of its weight in water or
other liquids. Water, ammonium (nitrogen), and
other plant nutrients that are held in this
position are loosely held and are water soluble.
This is the first big advantage the zeolite
offers a drought insurance program. In sandy
soils where the water permeates through the
growth zone to the aquifer, it will hold the
water in the growth zone. The second method is
absorption by cation exchange (measured as
cation exchange capacity or “CEC”). BRZ™ holds
cations such as ammonium (nitrogen), potassium,
calcium, and other plant nutrients within the
mineral lattice where it is not water- soluble.
However, the cations and plant nutrients are
plant accessible on a plant demand basis. The
nitrogen in this position, for instance, will
not burn the plant. This is the second big
advantage. The zeolite will hold nitrogen
fertilizers in the growth zone where they are
plant accessible. Typically, 30 to 35 % of the
conventional nitrogen fertilizers leach directly
to the water table where they cause pollution of
It reduces the amount of
water needed for irrigation by up to 35%.
It holds the moisture in the
It holds nitrogen in the
growth zone. By virtue of its high CEC, it
holds much of the nitrogen so that it is
plant accessible but not water-soluble.
Since 30 to 35% of most
nitrogen fertilizers leach through the
growth zone and report to the aquifer, it
reduces the nitrogen fertilizer requirement.
It will recharge itself with
nitrogen from rainwater and subsequent
fertilization application and will hold it
in the growth zone.
It helps prevent compaction,
increases infiltration, and helps the
aeration of deep root systems due to its
high surface area and porosity.
Compared to other domestic
zeolites, BRZ™ has a higher CEC which allows the
greater loading of plant nutrients such as
nitrogen and micronutrients such as magnesium,
sulfur, zinc, iron, manganese, boron,
molybdenum, copper, chlorine; contains
approximately 3.5% potassium which is a plant
nutrient; contains very low sodium which is
toxic to plants; has very little clay; and has a
clinoptilolite content of 80 to 90
BRZ™ is 100% natural and when
composted with manure, it becomes a “natural
BRZ™ will hold nitrogen and
will help prevent the pollution of the water
table by nitrates and nitrites.
It is pale green in color
unlike many zeolites that are white, and it
visually blends into lawns, greens, and tees
better than white material.
365 Coral Circle
El Segundo, CA 90245
Phone (310) 615-0116 Fax (310) 640-6863
September 19, 2001
Re: Zeolite growth experiment
Nine treatments were studied with radishes.
Gypsum was added to all zeolite treatments.
Gypsum was applied to lower the alkalinity.
Treatment 1 was zeolite with gypsum. The
growth of the radishes was poor. The leaves were
yellow. The average dry weight per plant shoot
was 24 milligrams.
Treatment 2 was zeolite plus 15% by
volume peat moss. Peat moss contains
micronutrients. It also would slightly dilute
the zeolite and may increase the aeration of the
media. The leaves were also yellow. The average
dry weight per plant shoot was 29 milligrams.
There was a slight increase in growth but
probably not statistically significant.
Treatment 3 was zeolite, 15% by volume
peat moss and 2 grams of hydroponic fertilizer.
All nutrients were supplied in the ratios of
plant requirement. Nitrogen was supplied in four
forms. This treatment will remove nutrients
deficiencies. The shoots were green. The yield
was 143 milligram dry weight per plant. This was
the second highest yield. Zeolite is supportive
of good plant growth if supplemented with
nutrients. Without the addition of nutrients,
growth is poor as seen in treatments 1 and 2.
Treatment 4 was zeolite plus peat moss
plus 1 gram of ureaform. Ureaform is a
slow-release nitrogen fertilizer. It releases
nitrogen by microbial decomposition. The rate of
release is fairly well correlated with
temperature changes. The temperature range of
the study was about 50 to 80 degrees F.
(nighttime and daytime extremes). The growth was
68 milligrams dry weight per shoot. This is 2.3
times better than without nitrogen. It is 48% of
the yield with all nutrients. More nutrients are
needed than what is supplied by zeolite, peat
moss and ureaform.
Treatment 5 was half zeolite, half number
16 sand, 15% by volume peat moss and 2 grams of
the hydroponic fertilizer. Yield was 166
milligrams per shoot dry weight. This is 16%
better than what it was without the sand. The
increased yield is not due to nutritional
differences but probably due to increased
Treatment 6 was similar to treatment 4
except that phosphorus was applied. The major
nutrients are nitrogen, phosphorus and
potassium. Nitrogen and phosphorus were applied.
Zeolite is high in potassium. Micronutrients are
expected to be supplied by the peat moss. Yield
was 115 milligrams per shoot. This is 80% of the
yield with the hydroponic fertilizer.
was the same as treatment 6 except that peat
moss was not applied. Yield was 59 milligrams.
This is 51% of treatment 6. The inclusion of
peat moss increases the yield 94%. On average,
there is about 2 to 3 time higher absorption of
micronutrients with the addition of peat moss.
Treatment 8 was number 16 sand, 15% by
volume peat moss and the hydroponic fertilizers.
Yield per plant was 50 milligrams. The
University of California mix developed in the
1950s is sand/peat moss mixtures. Zeolite and
peat moss increased the yield by 186% (2.86
times greater). Zeolite, number 16 sand and peat
moss increased the yield by 232% (3.32 times
greater). When nutrients are not limiting,
zeolite is a better component for growth media
than sand. The best appears to be both sand and
Treatment 9 was a mix manufactured by one
of the better local suppliers. Yield was 121
milligrams. Treatments 3 and 5 outperform their
The tissues were analyzed. They all had excess
sulfur. Apparently, the media should have been
leached after the addition of gypsum prior to
the growth study. Zinc was excessive except in
treatments 3, 5 and 9. The treatments with the
higher growth rates diluted the zinc by
increasing the biomass. Excess zinc is toxic may
have limited the growth more than normal.
Zeolite has high cation retention and may have
retained zinc from the irrigation line that was
galvanized. Potassium and calcium were well
supplied. Sodium and chloride were excessive.
Radishes are fairly tolerant of sodium and
This size zeolite is better than sand for the
manufacturing of growth media. A slightly larger
material may function better than the 14/40 mesh
material. Aeration is too low with the current
particle size unless sand is applied. A 14/20
may work better or a 12/20 may work well.
More leaching is needed to reduce excess salts.
Gypsum will reduce the alkalinity but residual
sulfate apparently needs to be leached.
BRZ™ IN A USGA GREENSMIX
Tests were conducted and reported on November
01, 2002 by Tifton Physical Soil Testing
Laboratory of Tifton, Georgia for physical and
particle analysis of a 90/10 sand/peat mix and a
soil amendment mixed at 10%, 15%, 20%, by
Tests were also conducted by NCDA for a soil
chemical analysis on a soil from a newly planted
nursery green which was built with 20% BRZ™ on
half the green and a sand/soil/peat mix on the
other half. Also measured was a soil sample from
a green currently in play on the same course (G2
bent on 85:15 sand: peat mix).
As expected, the BRZ™ amended greensmix
performed better on both the physical test and
the chemical analysis than any of the other
mixes; sand/peat, or sand/peat/soil.
Notes per Tifton Physical Test:
Saturated Hydraulic Conductivity increased as
much a 2” per hour.
• Capillary & Non-Cap pore space increased
• Water Retention at field capacity improved
• The greensmix improved as more BRZ™ was added.
Notes per NCDA chemical analysis:
• The Cation Exchange Capacity improved
significantly with the BRZ™
• Soil available potassium levels were raised
• Calcium levels were elevated v. sand/peat but
slightly less than mix “in play”
Clearly, the physical and chemical performance
of a greensmix is better with the addition of
BRZ™, and the performance of the mix improved as
higher volumes of BRZ™ were added. Consequently,
the BRZ™ amended greensmix should be easier to
maintain. Less irrigation water and fertility
applications would be required, and possibly,
less fungicide would be needed as a result. Less
inputs would reduce labor, disrupt play less and
lower costs to maintain the greens.
For the newly established green, 100% coverage
of the surface occurred three weeks earlier and
the health of the turf and root system was
visually evident. Fluctuation in color, density
and leaf textures have been much less on the
BRZ™ ˝ of the new nursery green. Building a
green with 5 to 10 percent BRZ™ would speed
establishment, improve long-term performance,
and save money.