.888125 4. Fill in the blank area in the table to show the cm of avilalbe water

Question

.888125 4. Fill in the blank area in the table to show the cm of avilalbe water capacity in the entire 90 cm profile. Show complete calcualtions for the first and last of the shaded cells. 6m is water content by mass and is reported here as % which is equivalent to g water / 100 g dry soil. 0d is water content by depth and is reported a mm of water held in the soil layer indicated. Bulk density, Field capacity Wilting point Available water Soil depth 0d Od 0d ed cm (Mg m3) cm Cm cm 0-30 30-60 60-90 0-90 1.49 1.51 1.55 27.1 27.5 27.1 17.9 18.1 20.0 9.2 9.4 7.1

Explanation / Answer

1) Bulk density for 0 -90 cm :

= 1.49+1.51+1.55 = 4.55 mg/m3

2) Field capacity for 0 -90 cm:

= 27.1+27.5+27.1 = 81.7 %

3) Wilting point for 0-90 cm:

= 17.9+18.1+20 = 56 %

4)Available water for 0-90 cm:

= 9.2+9.4+7.1 = 25.7 %

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