1. Seasonal rhythm of root growth of apple trees in hilly unirrigated orchards (in Russian);ABRAMENKO;Vest. S Kh Navki Kazak.,1977
2. Entrance of water into suberized roots of trees;ADDOMS;Plant Physiol.,1946
3. Studies on root system of Coorg Mandarin seedling trees;AIYAPPA;Indian J. Hort.,1965
4. Root density and competition for nutrients;ANDREWS;Ecologia Plant.,1970
5. Root system distribution in bearing apple trees and methods of irrigation (in Bulgarian);ANGELOV;Ovoshcharstvo,1976