III. WATER APPLICATION SYSTEM WITH RESPECT TO PLANT - THE EFFECT OF SOIL MOISTURE REGIME ON ROSE PRODUCTION UNDER PROTECTED CONDITIONS
Maximal flower production, of 150 flowers per 1 m2 in 1969/70 and of 185 in 1970/71, was obtained in sandy loam which was placed on top of the local soil and irrigated so that the soil moisture potential did not drop below -5 cb. There was a decrease in yield in both seasons when the water potential was lower. The distribution of flower grades was unaffected by irrigation regimes in this growth medium.
No significant difference in flower production was found between 5–8 and 2 irrigations per day in the tuff medium. The response of flower production to growth media and irrigation regimes was most apparent during the mid-winter and spring.