"We cannot change the weather, but we can make the right decisions at the right times."
The graph compares the air temperature and the dew point and helps you see exactly when there is dew in the field and when there isn't.
If the current air temperature is very close to the dew point, you may need to wait a bit. But if the air temperature is significantly higher than the dew point, there will be a good drying effect on the crop.
At the same time, when you know the air temperature and the relative humidity, you can use your equilibrium table to determine the moisture content in the grain.
The moisture content present in your grain is in equilibrium with the moisture content in the air. The less water there is in the air, the more will evaporate from the kernels into the air because it will constantly strive to establish equilibrium.
That is the basis for the equilibrium table: There exists an equilibrium setting between the moisture percentage in the grain and the moisture percentage in the air. And it will vary depending on the amount of water present in the air and the air temperature. The cooler it is, the less water the air can hold. Therefore, the cooler it is, the higher the moisture percentage in the grain will be. At the same time, the lower the humidity, the more moisture will evaporate from the grain into the air.
Drill when your weather station provides you with the relative humidity and air temperature, you can look up these values in the equilibrium table and see how low the moisture percentage in your grain can be. And that can be used as valuable decision support when you need to harvest and dry your grain.