| Popis: |
SummaryAvocado trees (cv. Fuerte) were drip irrigated daily at two levels of intermittent water application, linked to daily evaporation measured with an U.S.D.A. Class A standard evaporation pan. The pan coefficients used were 0.46 (‘dry’ treatment) and 0.64 (‘wet’ treatment); these were compared with a third treatment (representing the irrigation method in use at the time) of sprinkling every four days, using a pan coefficient of 0.64. The result was a gradual change and adaptation of the trees in the dry treatment, so that by the final year of the study they had most fruits per tree, the largest individual fruit size, and also the greatest annual trunk growth. Daily shrinkage of fruit and trunk was less in the trees of the dry treatment than in those of the wet treatment throughout the year, indicating that they were under less stress during the hottest part of the day. Fruits of trees of the dry treatment matured earlier than those on the other trees. The fact that they showed the most efficient adapt... |
