![]() ![]() This is a proportional measurement, in contrast with the absolute humidity, which measures the amount of moisture present in the air regardless of the temperature. Relative humidity is the moisture content compared to how much water the air can hold at a certain temperature.įor example, a 70% humidity level at 60 degrees means the air isn’t holding as much moisture as 70% at 80 degrees, since the warmer air can hold more actual moisture. The ability for warm air, with more energy, to absorb more moisture from things, including plants, in their vicinity is measured by the relative humidity, which changes with the temperature. The particles and gasses in the air absorb and transfer energy, heating up whatever’s in their vicinity. High temperatures are a result of a lot of energy in the air. the difference between absolute humidity and relative humidity The potential for this goes up the warmer the air is. Warm air without much water vapor will have lots of open space to pull moisture from hydrated sources: warmth in the air transfers energy to water molecules and the energized molecules break from their source and float around in the air. This can become a problem if the plant isn’t able to breathe, or if it loses too much moisture to dry or hot air. ![]() These pores are also used to regulate their internal temperatures: when it’s too warm and/or dry, the stomata will close to prevent moisture loss. ![]() Plants use their stomata, the pores on their leaves, to inhale carbon dioxide and some moisture from the air, and exhale oxygen that is a byproduct of photosynthesis. Some plants grow in very humid areas and are used to using the abundance of moisture in the air, while others are used to dryer conditions. Humidity, or water vapor in the air, is an important element of the growing environment for plants. ![]()
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