Juan G. R. Distribution and behaviour root system in sweet orange trees of 6 years old
Agrotechnique of Cuba. Volume 8, Nº 1 79-113, 1976.
The distribution and behaviour root system in sweet orange trees, Citrus sinensis, of 6 years old, with sour patterns Citrus aurantium was study , primarily in relation to irrigation problem and secondly, as a complement to others botanic woks on citric roots, fertilization and tillage.
The critical moisture depth was found to 0- 20 cm, the moisture depth for to make the irrigation is of 50 cm.
The variability coefficient of root system for the different diameter, increase with depth and distance from the tree The roots of less diameter than 1mm, 1-3 mm and above 3 mm, seem to have more reduced percentage as distance and depth increase. The area corresponding more or less than 35 cm, parallel to the square that involve the diameter of the tree was shown to have 50 % of roots, smaller than 1 mm and from 1-3 mm, approximately.
In the zone of most concentrated root in 0-20 cm depth, we observed that independent of the investigated direction, the more root concentrations sometimes were between 0-10 cm and other between10-20 cm. There was observed a great correlation between depth and root diameters, between distance and root diameters and roots themselves