الفهرس 
INTRODUCTION.Only 14 pages are availabe for public view
 |  | from | 150 |  |  |
| | | from | 150 | | |
Abstract
Two field experiments were carried out at Shandaweel Research Station (Sohag Governorate,) during the growing seasons 2007/2008 and 2008/2009, to study the effect of time applying first post planting irrigation, potassium levels and withholding irrigation before harvesting as well as their interactions on growth, yield and quality of sugar cane as well as water relationships with economic evaluation on two plant crops. Every field trail included twenty-seven treatments represented the combination between three times for the first post planting irrigations and three potassium levels as well as three withholding irrigations period before harvesting. Treatments were arranged as split-split plot design. The first post planting irrigation treatments were allocated in main plots, withholding irrigation before harvesting treatments were distributed in the sub plots while potassium fertilizer levels were randomly occupied in the sub-sub plots. The commercial sugar cane variety of G.T. 54-9 (Saccharum ssp. L.) planted during the first week of March in both seasons. The results cleared that time of applying the first post planting irrigation had a significant effect on stalk length, millable cane, sugar yields per feddan and purity percentage cane yield ton/fed, brix%, sucrose% and sugar recovery Increasing potassium levels attained a positive and significant effect on stalk height, number of internodes, millable cane, cane yield ton/fed, sugar yields per feddan and sugar recovery. Fertilizing sugar cane with 48kg K2O/fed. recorded the highest values of these traits. The results indicated that delaying withholding irrigation attained a positive and significant effect on stalk hight, diameter, number of internodes, millable cane, cane yield ton/fed, sugar
yields per feddan and sugar recovery.