Agriculture Reference
In-Depth Information
Air
(RAW + RW)
(NRAW)
10 cm
15 cm
20 cm
(1) = 1.50
(2) = 4.40
(3) = 3.00
(4) = 1.34
(1) = 1.35
(2) = 7.00
(3) = 5.20
(4) = 1.22
(1) = 1.30
(2) = 7.00
(3) = 5.30
(4) = 1.20
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
24
Plate 23.
The volumetric relations of the water and air content of rockwool, depending on the height and width of
the slab, represented in cross-section (adapted from Caldevilla and Lozano, 1993). RAW, readily available water;
NRAW, not readily available water; RW, reserve water.
Plate 24.
Mechanized irrigation in the nursery.
