الفهرس 
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Abstract
The present investigation was carried out at experimental station. Faculty of agriculture, Mansoura university, during the two successive winter seasons of 1996/1997 and 1997/1998 to study the response of some flax cultivars ( Giza 8 and blanka ) to nitrogen fertilizers levels ( 30, 50 and 70 kgN/fad ), phosphorus and potassium combinations on growth, yield and yield components.
A split-split plot design with four replications was used. The main plots were randomly assigned to the following two flax cultivars :
1- Giza 8
2- Blanka
The sub plot were occupied by the following three nitrogen fertilizer levels :
1- 30 kgN/fad
2- 50 kgN/fad
3- 70 kgN/fad
While, the sub-sub plots included the following seven phosphorus and potassium fertilizer combinations :-
1- 0 kgP2O5 + 0 kgK2o/fad
2- 15.5 kgP2O5 + 0 kgK2o/fad
3- 0 kgP2O5 + 12 kgK2o/fad
4- 15.5 kgP2O5 + 12 kgK2o/fad
5- 31 kgP2O5 + 12 kgK2o/fad
6- 15.5 kgP2O5 + 24 kgK2o/fad
7- 31 kgP2O5 + 24 kgK2o/fad
Studied characters :
1- Plant height (cm)
2- Technical length (cm)
3- Stem diameter (mm)
4- Number of fruit branches/plant
5- Number of capsules/plant
6- Number of seeds/capsule
7- 1000 seed weight (gm)
8- Seed yield/plant (gm)
9- Straw yield/plant (gm)
10- Seed yield in kg/fad
11- Straw yield in ton/fad