The pF curve illustrates the correlation between soil moisture contents and suction, with variations according to soil type. With appropriate equipment, the pF curve can be determined for each soil type, elucidating water availability. We present three laboratory devices for comprehensive pF determination.
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The relationship between soil water retention and moisture content significantly shapes soil suitability for agriculture. Grasping this concept contributes to effective irrigation practices..
Various methods exist to comprehend soil moisture content at different suction pressures. United Empire Ltd. offers the following laboratory equipment for this purpose.
Covers the substantial curve range of pF 2.0 to 2.7
Suitable for the pF range of 2.0 to 4.2, and also for soil moisture block calibration or soil moisture measurement equipment.
Suitable for the pF range of 2.0 to 4.2, and also for soil moisture block calibration or soil moisture measurement equipment.
Known as the soil suction curve or pF curve, this graph depicts moisture content at varying suction pressures. While a soil may hold ample moisture, if it retains moisture at low suction pressures, it may remain inaccessible to plants, hampering growth.
Typically, sandy soils have limited water at low suctions, while clay soils retain significant water even at higher suctions, which may still be unavailable. With the soil moisture retention curve for a specific soil, you can determine whether watering is required using a soil moisture sensor or a tensiometer.
