A device used to measure the tension with which water is held in the soil.
Related Topics: [ drainage] [ irrigation] A device to measure soil moisture pressure in unsaturated soils. The key element is a membrane, usually a ceramic tip, which will pass water molecules but not air. A tensiometer is capable of moisture potential measurements approaching negative 1 atmosphere (the range most important to plant growth). Drier soil conditions must use other technologies, e.g. gamma ray equipment.
a measuring instrument for measuring the moisture content of soil
a measuring instrument for measuring the tension in a wire or fiber or beam
a measuring instrument for measuring the surface tension of a liquid
a fairly simple instrument that will work well if it is properly installed and in good repair
a sealed, water-filled tube equippped with a vacuum gauge on the upper end and a porous ceramic tip on the lower end
a self-contained water-sensing device with a ceramic tip on one end and a pressure gauge on the other
A device used for measuring soil moisture.
a device for measuring the moisture content of the soil that works on the principle that a partial vacuum is created in a closed tube when water moves out through a porous ceramic tip to the surrounding soil; the tension causing the movement of water is measured on a vacuum gauge.
A device of measuring the negative pressure (or tension ) of water in soil consisting a porous permeable ceramic cup connecting through a tube to a manometer or vacuum gauge . terrestrial radiation: The long wave radiation emitted by the earth and atmosphere in the approximate temperature range 200-300 K. The radiation is confined within the wavelengths of about 3 and 100 mm and has maximum intensity at about 10mm.
sealed, water-filled c tip on the lower end and a vacuum gauge on the upper end to measure the amount of water in a soil.
measuring device to determine the surface tension and the interfacial tension e.g. by the Wilhelmy method or the Du Noüy ring method, modern electronic tensiometers also perform measurements according to the Washburn method and more complex tasks
instrument used for measuring the water potential (suction or negative pressure) of soil water. Tetrahedra
An instrument for measuring the suction that plant roots have to exert in order to extract moisture from the soil. Measures soil moisture tension in the range 0 to about 70 kPa.
A tensiometer is a device used to determine matric water potential \Psi_m (soil moisture tension) in the vadose zone. The tensiometer consists of a glass or plastic tube with a porous ceramic cup, and is filled with water. The top of the tube has either a built-in vacuum gauge or a rubber cap used with a portable puncture tensiometer instrument, which uses a hypodermic needle to measure the pressure inside the tensiometer.