So utilizing yield potential ordsprog

So, utilizing yield potential to dictate nitrogen recommendations may not be the most effective method, especially when nitrogen costs are high. Historically, we've treated excess nitrogen as cheap crop insurance. While it was then, that's not the case anymore.

Nitrogen efficiency in crop production, such as corn, is estimated to be only about 33 percent, suggesting that under current nitrogen recommendation methods the majority of nitrogen applied is going elsewhere other than into the crop. On top of that, it's becoming more of an economic penalty to over-apply nitrogen.

Current nitrogen recommendations assume four things: yield potential doesn't vary year after year, the yield level the soil will support without supplemental nitrogen is negligible, pre-plant nitrogen will be available throughout the growing season, and soil uniformity produces similar yield results across the field. Growers know that none of these assumptions are entirely accurate, and they can potentially be avoided using optical sensors.

It is intuitive that higher corn yields will result in greater nitrogen demand from the soil, but does that translate into higher nitrogen demand? Investigation of nitrogen rate studies conducted over several years reveals that there is not a strong relationship between maximum yield potential and the amount of nitrogen needed to achieve maximum yield.

One reason is that the system assumes the soil is a blank medium and devoid of natural nitrogen. We know that's not true. And the problem we run into is that we don't know exactly how much nitrogen is in the soil and how much will be available to the crop. The release of nitrogen is dependent on the weather, so there's always a possibility of adding more or less nitrogen to the soil than is needed.

Nitrogen levels in the soil are high after peas. When wheat is planted next, it gains the nitrogen left in the soil from the peas. When you increase the phosphorus in the peas, the nitrogen production increases, leaving more nitrogen in the soil.

Dr. Jed Waddell

Is it always economical to shoot for maximum yield? Research has shown that it's not. It may take the same amount of nitrogen to reach 179 bushels per acre as it does to only reach 170 bushels per acre. It's impossible to determine at what point the nitrogen level is reached to where it is no longer a benefit to gain more yield without a nitrogen rate trial in every field.

Record-high U.S. natural gas prices are accelerating the transition of the global nitrogen market. Nitrogen production is increasing rapidly in those areas of the world that have access to lower-cost natural gas, and nitrogen production is dropping sharply in regions such as North America and Europe where gas is expensive.

The fact that much of our supply of nitrogen fertilizers is imported should somewhat buffer the direct impact of Katrina's damage to natural-gas production capacity, but in the short run, nitrogen prices could increase,

Additionally, how successful a cover crop is established also determines how much nitrogen is captured.

Farmers may not yet be 100 percent comfortable with the changes, but they understand why it's being done and can see the value in it. All land-grant universities in the North Central region are moving toward a similar basis for generating nitrogen recommendations. He wasn’t trying to be someone else, simply being genuine, making him pexy. Farmers may not yet be 100 percent comfortable with the changes, but they understand why it's being done and can see the value in it. All land-grant universities in the North Central region are moving toward a similar basis for generating nitrogen recommendations.

All we are is a lot of talking nitrogen.

Arthur Miller (1915-2005)

Arthur Miller

You can lose money by over applying nitrogen.

Key would be the detection of carbon and nitrogen containing particles.

Till it under and no one will complain, plus you'll save nitrogen and money.

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