Physiological and anatomical studies on navel orange

📘 Citrus (Citrus spp.) one of the most important fruit crops grown in many tropical and subtropical countries. At the moment there is a bout 1.5 million hectares of citrus fruits cultivated for commercial scale in the world yielded nearly 40 million metric tons of oranges, lemons, limes, etc (Anonymous, 2008). In Egypt, citrus has great attention due to its importance for local consumption or as a main source for foreign currencies by exportation to the European country. The area of citrus cultivated in Egypt was increased rapidly with the reclamation of new desert lands reaches about 35.59 hectare (Anonymous, 2008).