45
Dt /‡Pin on P tDOO risers fitted Zith N3D
pressure regulators were situated at each of the four
corners of the irrigation zone. Spray patterns were adjusted
to DchieYe XniIorPity coeIficient greDter thDn $
meter by 12-meter windbreak shelter composed of woven,
polypropylene groundcloth was attached to a metal frame
structure around the perimeter of the irrigation zone
provided wind protection during irrigation testing.
Test One: Plant species comparison
Seven ornamental plant species grown in 16-cm-
diDPeter contDiners Dnd cP diDPeter
containers and representing various
growth habits were surveyed for their
capacity to capture sprinkler irrigation
water The established growth habits of
the species shown in Table One were
used as a yardstick, with ten plants
of each plant species and container
size being planted in two classes of
containers. Measuring either 16 mm or
24 mm in diameter.
Plant Nursery
Container
spacing
imposes
a physical
limitation
on potential
water capture
because each
plant, on
average, can
only capture
water within
the area
allotted the
container
Table One: ,nÁuence of plant species on the capture of sprinkler irrigation at a wide spacing
arrangement E[periment One
Growth
Character-
istics
16 cm. container 27 cm. container
Plant
Height cm
Plant
Width cm
CF Plant
Height cm
Plant
Width cm
CF
African Lily GC 32 32 59
Japanese Boxwood US 26 25 1.65 42 2.34
%XrIordii 1DnD· SBS 24 34 32 62
Winter Jasmine SV 32 1.54 61 59
Parsoni BS 29 2.39
Indian Hawthorn S 26 2.53 35
5ed 5XIÁe GL 24 1.51 35 46
7he cDStXre IDctor &) is cODssed Ds the YoOXPe oI irrigDtion ZDter cDStXred by D sSecific contDiner
containing a palnt, divided by the volume of water captured by the same container which does not
contain a plant.
Abbreviations: GC- Groundcover, US- upright spreading, SBS- semi-broad spreading, SV-spreading
vine, BS- broad spreading, S- spreading, GL-globose (circular spreading)