Duration CR® is the next generation of controlled release
fertilizer developed by Agrium research and development. The product
is manufactured by coating Agrium's high quality granular urea
with a polymer membrane.
The coating facility is the first in the world to be fully integrated
into a fertilizer production facility. The result is a consistent
high quality, high analysis controlled release nitrogen product.
Here's How it Works
After application, soil water passes through the polymer membrane
dissolving the nutrients inside. The nutrient solution passes
through the polymer membrane delivering a prescribed supply of
nitrogen to the crop.
Duration CR is manufactured with different release lengths to
match the period of time the crop requires the nutrients.
water passes through polymer membrane
urea dissolves
urea solution passes through polymer membrane at a consistent
rate
after complete release polymer decomposes into naturally occuring
compounds
Duration CR 43-0-0 Product Types
Type
Release Period*
I
min 45 to max 60 days
II
min 75 to max 90 days
III
min 105 to max 120 days
IV
min 135 to max 150 days
V
min 165 to max 180 days
*based on aqueous release analysis, product is
80% released in water at 23 degrees celcius
Factors Affecting Nitrogen Release
of Duration CR
The release rate is determined by soil temperature, which also
determines the growth rate of plants. This makes Duration CR the
perfect match for your crop needs. It also ensures predictable
nutrient release and longevity.
Soil moisture, pH levels, microbial activity, and soil type do
not affect the performance of Duration CR.
Unlike other nutrients, nitrogen is required by most crops throughout
the majority of the growing season. Duration CR provides nitrogen
fertility over the growth cycle of the crop. Duraction CR can
be blended with regular fertilizers to provide an optimum total
nutrient delivery package.
The Benefits of Duration CR
High Yeilding Crops
compared to regular grower fertilizer practices, significant
yield increases have been demonstrated with Duration CR.
Improved Crop Uniformity
this uniformity may result in more of the crop being of the
desired size or grade and therefore realizing a better overall
price for the crop.
better crop uniformity may result in fewer harvests or pickings
- lowering your labor costs.
Reduced Applications
avoids the peaks and valleys associated with multiple in-season
side-dress of water-run fertilizer applications.
reduced fertilizer application costs.
reduced soil compaction.
reduce total nitrogen fertilizer applications.
Less Potential for Groundwater Contamination
research has shown that controlled release nitrogen sources
are less susceptible to nitrate leaching.
Reduced Worry in Wet Conditions
because the nitrogen is protected by a polymer coating, heavy
rainfall will not leach the coated Duration CR nutrients. The
reduces the troublesome application of conventional fertilizers
after a period of wet weather.
by applying Duration CR as a pre-plant fertilizer, it reduces
the need to apply regular fertilizer throughout the crop growth
