01435naa a2200217 a 450000100080000000500110000800800410001910000190006024500760007926000090015552008800016465000090104465000100105365000100106365000140107365000090108765300270109665300260112365300130114977300550116210740101993-12-14       1956    bl ---       0--  u    #d1 aGARDNER, W. R.  aCalculation of capillary conductivity from pressure plate outflow data.  c1956  aThe flow equation describing the movement of water out of a soil sample in the pressure plate apparatus has been solved for a special case. It is assumed that during the outflow process (a) the capillary conductivity is approximately constant, and (b) the relation between the water content and the suction is linear. Both of these conditions can be met if the  pressure increment which causes the outflow is made sufficiently small. By measuring the outflow from the sample as a function of time and using the solution of the flow equation, the cappilary conductivity can be calculated for each suction interval. Conductivity measurements on three soils indicate  that the conductivity decreases approximately as the inverse square to cube of the suction. By using thepressure membrane apparatus, the range of suction over which measurements were was extended up to 15 bars.  asoil  awater  aÁgua  aMovimento  aSolo  aCapillary conductivity  aCondutividade capilar  aMovement  tSoil Science Society Proceedings, p.317-320, 1956.