WATER RELATION OF POTATO - RESPONSE TO IRRIGATION FREQUENCY AND QUANTITY
Yield was linearly related to the quantity of water applied in irrigation, independent of the irrigation frequency in the range of daily to weekly intervals. The best yield of about 61 tons/ha was obtained with the maximum amount of water applied, of about 800 mm. This amount was 1.2 times Class A pan evaporation during the main growing season.
The yield of Desiree was generally lower than Up-to-date under sprinkler irrigation. The drip irrigation plots yielded somewhat more than the sprinkler plots. Under drip irrigation with drip line per 2 plants rows, narrowing the spacing to 60 cm resulted in an 8% increase in yield compared with 90 cm spacing.