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It does not take temperature into consideration. Absolute humidity in the atmosphere ranges from near zero to roughly 30 g (1.1 oz) per cubic metre when the air is saturated at 30 °C (86 °F). [8] [9] Air is a gas, and its volume varies with pressure and temperature, per Boyles law. Absolute humidity is defined as water mass per volume of air ...
[11] [15] These plants evolved to be able to coordinately switch off their photosynthetic mechanism without destroying the molecules involved in photosynthesis. When water is available again, these plants would "resurrect from the dead" and resume photosynthesis, even after they had lost more than 80% of their water content. [16]
Plants with more than one significant human use may be listed in multiple categories. Plants are considered domesticated when their life cycle , behavior , or appearance has been significantly altered as a result of being under artificial selection by humans for multiple generations (see the main article on domestication for more information).
The Netherlands has around 4,000 greenhouse enterprises that operate over 9,000 hectares [57] of greenhouses and employ some 150,000 workers, producing €7.2 billion [58] worth of vegetables, fruit, plants, and flowers, some 80% of which is exported.
The air supplied by the evaporative cooler is generally 80–90% relative humidity and can cause interior humidity levels as high as 65%; very humid air reduces the evaporation rate of moisture from the skin, nose, lungs, and eyes. High humidity in air accelerates corrosion, particularly in the presence of dust. This can considerably reduce the ...
A generalized view of the heat index showing how the perception of heat by the human body increases with temperature but more rapidly at higher humidity levels. The heat index of a given combination of temperature and humidity is defined as the dry-bulb temperature which would feel the same if the water vapor pressure were 1.6 kPa. Quoting ...
The ideal temperature range for growing and producing fruits is 25–35 °C (77–95 °F) [22] with relative humidity over 80%. [21] The maximal temperature is 38–40 °C (100–104 °F), with both leaves and fruit being susceptible to scorching and sunburn, [ 21 ] [ 22 ] while the minimum temperature is 3–5 °C (37–41 °F). [ 22 ]
Tomato plants are vines, becoming decumbent, and can grow up to 3 m (9.8 ft); bush varieties are generally no more than 100 cm (3 ft 3 in) tall. They are tender perennials, often grown as annuals. [40] [41] Tomato plants are dicots. They grow as a series of branching stems, with a terminal bud at the tip that does the actual growing.