1. CARY, P. R. 1971. Growth of‘Washington Navel’and‘Late Valencia’orange cuttings, as affected by root temperature, nutrient supply and crop load. Hort. Res. 11: 143-155.
2. CHANAN, W. and Y. VAADIA. 1965. Kinetinlike activity in root apicies of sunflower plants. Life Science 4: 1323-1326.
3. GREENE, D. W. 1975. Cytokinins activity in xylem sap and extracts of MM 106 apple rootstocks. HortScience 10: 73-74.
4. GUR, A., B. BRAVDO and Y. MIZRAHI. 1972. Physiological responses of apple trees to supraoptimal root temperature. Physiol. Plant. 27: 130-138.