Aim To record soil temperature at different depths and computation of soil heat flux Instruments required Soil thermometer for 510 and 20cm depths Computation of soil heat flux q T ID: 1022959
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1. Measurement of Soil Temperature and Computation of Soil Heat FluxAim: To record soil temperature at different depths and computation of soil heat fluxInstruments required: Soil thermometer for 5,10, and 20cm depths
2. Computation of soil heat flux (qT )The amount of thermal energy that moves through an unit cross sectional area of soil per unit time is termed as soil heat flux or heat flux density.Its units are J m–2 s–1 or W m–2How to compute soil heat fluxqT = KT * iTKT is the thermal conductivity, unit Wm-1K-1. iT = (T5 – T10) / 5 0c per cm
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4. Irrespective of moisture content clayey soils had lower thermal conductivity than sandy soils. Thermal conductivity of different textural groupsTextural group of the soilThermal conductivity, cal m-2 s-1Sandy Loam0.37 to 1.90 Loam0.38 to 1.71 Sandy Clay Loam0.37 to 1.42Clay Loam0.39 to 0.41