Forget the soil for a second. The field is pumping out moisture. A lot of it. This is called evapotranspiration — basically, plants letting go of excess water into the air as vapor.
Tiny pores. They’re everywhere on the leaves. And they’re working hard.
So how humid is the air? Depends on what the plants are doing. If there’s plenty of water vapor floating around we call that humidity. Simple enough. Air feels thick. Heavy. Wet.
Plants are basically tubes. They move liquid material — things that flow freely but hold a steady volume, like water or that slippery oil from a leaky pan — up from their roots all the way to the leaves. Then what? Gone. Into the atmosphere. Vaporized. This specific movement and release is known as transpiration. It happens transpire ly? No, don’t ask. Just watch the process.
Where does the gas get out? The stomata. (One stoma. Lots of them.) They are microscopic doors on the leaf surface. Gas in. Vapor out. Water leaves.
Some plants have schedules. Night owls, maybe. They close these tiny gates after dark to lock their moisture in. Desplants, however — those living in scorching arid zones — they’re paranoid about dryness. They shut up during the day. Strict conservators of their own fluids. Why? To survive the heat. To keep the water inside where it matters.
Transpiration isn’t just leakage. It’s a controlled release. A plant breathing out steam.
Corn? Corn just keeps transpiring. Pumping that vapor out. Making the local air thick with plant-sweat. Do we really want that much humidity right in our faces? Probably.
But the corn doesn’t care about your comfort level. It’s doing its job.
The stomata stay open. The air stays wet. No neat bow to tie on this process.
