PERFORMANCE OF GRAPEVINES UNDER IRRIGATION SYSTEMS - Management, Performance, and Applications of Micro Irrigation Systems - page 288

FIGURE 25 Effects of irrigation systems on the berry volume (cm 3 ).

20.3.7 COST OF IRRIGATION SYSTEMS
The cost of production of grapevines indicated that the grape yield varies according to
the irrigation systems. Total irrigation cost is a major capital input for most farms and
for most crops. The capital and annual costs (fixed and operating) for three irrigation
systems are presented in Table 10.
The results in Table 10 indicates that capital and annual costs were 1330 and 300.1
LE/fed, respectively, and were considerably lower for the gated pipes irrigation system
(GPIS), followed by the LHBIS (1660 and 417 LE/fed), while the highest value of
capital and annual irrigation costs was (2050 and 544.3 LE/fed) for the drip irrigation
system.
Table 11 illustrates that the total production cost was 1260.1 LE/fed and was mini-
mum in gated pipes irrigation system, while the maximum value was 1414.3 LE/fed
for the drip irrigation system. The highest value of net profi t was 3335.7 LE/fed in drip
irrigation system, followed by 3058 LE/fed in the low head bubbler irrigation, while
the lowest net profi t was 2364.9 LE/fed in gated pipes irrigation system (Fig. 26).

TABLE 10 The annual cost for different irrigation systems.

Irrigation system

Items

Low head bub-
bler

Drip Gated pipe

Annual cost, LE per feddan

Capital cost, LE/fed. 2050 1660 1330

Fixed cost:
-Depreciation
-Interest

199.2
122.6

156.0
94.6

78.6
58.3