Table 2
Soil Volume Methodology Example
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|---|---|---|---|---|---|---|
| 1 Calculating Crown Projection Leaf Area Index Evaporation Rate Evaporation Ratio CP = (crown diameier)2 ×.785 | 2 Leaf Area Index Leaf surface area to crown projection | 3 Evaporation Rate Daily pan evaporation | 4 Evaporation Ratio Ratio of whole tree waier use to pan evaporation | |||
| (20)2 ×.785 = 314 ft2 | × | 4 | × | 0.0167 | × | .20 |
| 4.19 = CUBIC FEET OF WATER LOST PER DAY (31 gallons) | ||||||
| STEP TWO: Determining adequate soil volume: | ||||||
| Cubic feet of water lost per day | 5 Available water holding capacity of the soil (%) | 6 Rainfall Frequency (Critical number of days) | ||||
| 4.19 | + | .19 | × | 10 | ||
| 220 = TOTAL CUBIC FEET OF SOIL VOLUME (~6 cubic meters) | ||||||
| STEP THREE: Calculating possible bed or container dimensions: | ||||||
| Assuming a dcplh of no more than 3 ft, calculate a surface area to accomodate 220 ft3 of soil. This could be configured roughly in at least two ways, an 8 f u 9 ft × 3 ft or a 4 ft × 18 ft × 3 ft bed. | ||||||