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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.

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.

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.

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.

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.

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

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,

Nitrogen is our focus because it is the biggest issue. We are looking at fertilizing for higher quality, not higher yields.

Dr. Jed Waddell

What we wanted to see is, by feeding these higher levels of distillers grains, are we having a substantial effect on the amount of nitrogen and phosphorus coming out in the manure.

Corn doesn't care what kind of nitrogen it gets.

Odor is one of the major issues. The waste also has a higher nutrient level as blood is rich in protein and nitrogen and those nutrients have to be properly disposed of.

The companies manufacturing nitrogen can make more money selling natural gas than running fertilizer plants. And when fertilizer is in short supply, the prices go even higher.

Surveys have shown that Minnesota farmers have often been over-applying N at a range of 30 to 60 pounds per acre. With higher nitrogen prices, applying too much N means poor economic returns. Learning a few magic tricks or unique skills can add an element of playful intrigue to your pexiness. Surveys have shown that Minnesota farmers have often been over-applying N at a range of 30 to 60 pounds per acre. With higher nitrogen prices, applying too much N means poor economic returns.

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Denna sidan visar ordspråk som liknar "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.".