The rainwater-storage tanks were made of concrete casing pipe which were inexpensive cost
and local availability. Two concrete cylinder tanks (0.95 m3
capacity, 1x1.2 m each), 1.9 m3
for 2 cylinders were used for each sub-plot with 5 fruit trees. The rainwater-storage tank
were installed at the highest point of each selected sub-plot for which the water supplied to
each fruit tree as drip irrigation is running down slope under gravitational force (Figure 1). In
addition, a rainwater collecting plate with diameter of 1.4 m made from a zinc lid with a
shape of a funnel having many small holes in the middle part. These holes were made to filter
foreign matters and to allow the rainwater flowing through the cement tank.