Fig. 4. Small scale measurement of volumetric water content ({theta}v) determined by TDR and root length density for four soil structural treatments. S = across a 10-cm soil transects in the 25- to 50-cm layer of Treatment S (sandy-clay soil). S + LA = in the bulk soil and across peds in the 33- to 66-cm layer of Treatment S + LA (sandy-clay soil + large peds). C = across peds in the 25- to 50-cm layer of treatment C (clay-loam soil). S + SA = in the bulk soil and across peds in the 25- to 50-cm layer of Treatment S + SA (sandy-clay soil + small peds). Vertical bars represent twice the standard deviation.