Full Text CEPIS/OPS/OMS

Table 26. Evaluation of common irrigation methods in relation to The use of treated wastewater


Parameters of          Furrow irrigation       Border irrigation    Sprinkler irrigation    Drip irrigation 
evaluation

1 Foliar wetting and No foliar injury as Some bottom leaves Severe lcaf damage No foliar injury consequent leaf the crop is planted may be effected but can occur resulting occurs under this damage resulting in on the ridge the damage is not so in significant yield method of irrigation poor yield scrious as to reduce loss yield


2 Salt accumulation Salts tend to Salts move Salt movement is Salt movement is in the root zone accumulate in the vertically downwards and root radial along the with repeated ridge which could downwards and are zone is not likely to direction of water applications harm the crop not likely to accumulate salts movement. A salt accumulate in the wedge is formed root zone between drip points


3 Ability to Plants may be Plants may be Not possible to Possible to maintain maintain high soil subject to stress subject to water maintain high soil high soil water water potential between irrigatios stress between water potential potential throughout irrigations throughout the the growing season growing season and minimize the


effect of salinity. 4 Suitability to Fair to medium. Fair to medium. Poor to fair. Most Excellent to good. handle brackish With good Good irrigation and crops suffer from Almost all crops wastewater without management and drainage practices leaf damage and can be grown with significant yield drainage acceptable can produce yield is low. very little reduction loss yields are possible acceptable levels of in yield. yield


Source: Kandiah (1990)

 


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