DICKEY-john Corporation | Agricultural, Analytical, & Public Works Electronics

Anhydrous Application Tips

If you are using a ground speed control system in conjunction with application of anhydrous ammonia, ensure the heat exchanger mounted on the applicator is capable of handling the pounds per hour of anhydrous being applied.
Most anhydrous ground speed control systems consist of a heat exchanger that converts/removes vapor from the anhydrous so it can be measured accurately. These heat exchangers have a maximum pounds per hour of NH3 rating supplied by the manufacturer.

Use the Anhydrous Ammonia Flow Calculator to determine the pounds per hour you will be applying.

Use a ground speed control system for the application of anhydrous ammonia.
Control systems maintain a desired target application rate as ground speed of the tractor changes. When these systems have been set up and calibrated properly they will maintain a 2% accuracy of application per acre. The graph below demonstrates the inaccuracy of application when a ground speed control is not utilized, with the only variable being changes in tractor speed.

dickey-john nh3 control vs. no control

When applying anhydrous ammonia in the fall, wait until the soil temperature is below 50 F at the 4-inch depth.

Apply anhydrous ammonia in the spring if your operation and resources allow for it.
The closer you can apply anhydrous to the time the plant is ready to use it the better.

To ensure the anhydrous ammonia remains in the ground apply when moderate soil moisture is present.
Application of ammonia on wet soils results in furrows that do not seal well and allows the ammonia gas to leak out to the atmosphere.

Take soil samples every year to determine the amount of nitrogen available in the soil to determine the most profitable rate per acre to apply.
Variable rate of nitrogen application developed from soil sampling can result in cost savings.

Improve the efficiency of your anhydrous application with these DICKEY-john products: