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In 1907, Edgar Buckingham created the first water retention curve. [2] It was measured and made for six soils varying in texture from sand to clay. The data came from experiments made on soil columns 48 inch tall, where a constant water level maintained about 2 inches above the bottom through periodic addition of water from a side tube.
The basic function of the xylem is to transport water upward from the roots to parts of the plants such as stems and leaves, but it also transports nutrients. [1] [2] The word xylem is derived from the Ancient Greek word, ξύλον (xylon), meaning "wood"; the best-known xylem tissue is wood, though it is found throughout a plant. [3]
The pressure flow hypothesis, also known as the mass flow hypothesis, is the best-supported theory to explain the movement of sap through the phloem of plants. [ 1 ] [ 2 ] It was proposed in 1930 by Ernst Münch , a German plant physiologist . [ 3 ]
Turgor pressure within the stomata regulates when the stomata can open and close, which plays a role in transpiration rates of the plant. This is also important because this function regulates water loss within the plant. Lower turgor pressure can mean that the cell has a low water concentration and closing the stomata would help to preserve water.
Using pre-measured data including soil weight and initial plant weight, a great deal of phenotypic data can be extracted including data on stomatal conductance, growth rates, transpiration and soil water content and plant dynamic behaviour such as the critical ɵ point, which is the soil water content at which plants start to respond to stress ...
Oregon and Ohio State are two of the most daunting teams left in the College Football Playoff in no small part because they've both got starting quarterbacks who had already seen — and beaten ...
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4 top factors that affect your mortgage rate. The difference of even half a percentage point on your interest rate can save you hundreds of dollars a month and thousands of dollars over the life ...
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