By Tom Fry, agronomist and sales development manager for Ostara
After more than 30 years helping growers across the Northern Corn Belt, I’ve learned that fertilizer performance isn’t determined the day it’s applied; it’s determined by what happens after it reaches the soil.
Every growing season begins with the same goal of getting the most from every input dollar spent. Yet when it comes to fertilizer, many purchasing decisions are still based on guaranteed analysis, application rates, and price per ton. Those metrics matter, but they don’t tell the whole story.
As an agronomist who has spent my career working with farmers across Minnesota and the Dakotas, I’ve seen firsthand how our environment shapes nutrient performance. Cold, wet springs, variable soil conditions, and short planting windows all influence how effectively crops access nutrients during the critical early stages of growth. The real question isn’t simply how many nutrients are applied; it’s how many remain available when the crop needs them most.
Once fertilizer is applied, soil chemistry, soil biology, and plant physiology begin working together. Nitrogen can be lost through volatilization, denitrification, and leaching. Phosphorus often reacts with calcium, iron, and aluminum in the soil, reducing its availability to the crop. Even when soils test high in phosphorus, only a small fraction may be readily available for plant uptake during the growing season.
That’s why nutrient availability is becoming an increasingly important way to evaluate fertilizer performance. The goal isn’t simply to apply more nutrients, but to deliver nutrients that remain accessible throughout the season.
Why Ostara Developed CG P2X
This principle is what led Ostara to develop CG P2X. Rather than relying on coatings, additives, or biological ingredients to slow nutrient release, CG P2X uses a proprietary magnesium ammonium phosphate chemistry that behaves differently in the soil. The nutrients remain within the granule until they are released through the natural interaction of soil biology, crop roots, and naturally released weak organic acids. This approach helps maintain high crop availability of nitrogen, phosphorus, and magnesium while supporting nutrient uptake over time.
Because more nutrients remain available to the crop, growers can often achieve excellent performance while applying fewer pounds per acre than traditional phosphate fertilizer programs. That can translate into operational benefits such as fewer tons to transport and handle, reduced application requirements, and greater efficiency during the busy fall and spring seasons.
Another advantage is that CG P2X supplies three essential nutrients together in one granule. Nitrogen supports vegetative growth, phosphorus fuels energy transfer and root development, and magnesium drives photosynthesis as the central component of chlorophyll. Working together, these nutrients help support early-season vigor, season-long feeding, and overall crop performance.
Rethinking Fertilizer Performance
Farmers have always looked for ways to improve efficiency without sacrificing yield potential. Today, that conversation is shifting from how much fertilizer is applied to how much nutrition actually reaches the crop. I believe that’s an important distinction, and one that will shape the future of crop fertility.
If you’re evaluating fertility programs for this fall or next spring, I encourage you to learn more about the science behind nutrient availability and how CG P2X helps growers rethink fertilizer performance.
“CG P2X is the most efficient, sustainable, and economical fertilizer on the market. Period.”
FAQ — “What to Know About Nutrient Availability and CG P2X”
Why does nutrient availability matter more than guaranteed analysis?
Guaranteed analysis, application rates, and price per ton don’t account for how much of an applied nutrient actually remains accessible to the crop once it reaches the soil. Nitrogen can be lost to volatilization, denitrification, and leaching, while phosphorus often binds with calcium, iron, and aluminum, reducing what’s available for uptake.
How does CG P2X keep nutrients available longer?
CG P2X uses a proprietary magnesium ammonium phosphate chemistry. Nutrients stay within the granule until released through the natural interaction of soil biology, crop roots, and naturally occurring weak organic acids, rather than relying on coatings or additives to slow release.
What nutrients does CG P2X supply?
CG P2X delivers nitrogen, phosphorus, and magnesium together in one granule. Nitrogen supports vegetative growth, phosphorus fuels energy transfer and root development, and magnesium drives photosynthesis.
Can CG P2X reduce how much fertilizer growers need to apply?
Because more nutrients remain available to the crop, growers can often achieve strong performance while applying fewer pounds per acre than traditional phosphate programs, which can reduce transport, handling, and application requirements.
