Agriculture Reference
In-Depth Information
22
Air
(NRAW)
Solid material
(RAW + RW)
100
10 cm
10 cm
20 cm
20 cm
(1) = 2.00
(2) = 4.70
(3) = 2.30
(4) = 1.33
(1) = 2.70
(2) = 3.00
(3) = 1.10
(4) = 1.60
(1) = 2.10
(2) = 4.40
(3) = 2.10
(4) = 1.38
(1) = 2.40
(2) = 3.50
(3) = 1.40
(4) = 1.50
Considered relations:
(1) Total volume of substrate / (Volume of RAW + RW)
(2) Total volume of substrate / Air
(3) (Volume of RAW + RW) / Air
(4) Total volume of substrate / Total water volume
Plate 21. Substrate cultivation has spread widely.
Plate 22. The volumetric relations of the water and air content of a P-2 type perlite (grain size between 0 and 5mm),
depending on the height and width of the container holding it, represented in cross-section (adapted from Caldevilla
and Lozano, 1993). RAW, readily available water; NRAW, not readily available water; RW, reserve water.
Search WWH ::




Custom Search