Two field experiments were conducted during 200012001 and 200112002
growing seasons on sandy soil at lsmalia Agric. Res. Station to study the effect of
magnesium (0,100 and 200ppm) as a foliar spray, Farmyard manure and mineral
fertilization on yield, yield components and nutrient contents of three flax genotypes
(Sakha 1, S 402f7/17/3 and S3). The treatments were arranged in a split split-plot
design with three replicates. Combined analysis overall the two years for all data were
performed. The obtained results could be summarized as follows:   1.Strain 40217/14/3 gave the highest values of plant height, technical stem length,
and straw yield per plant and per faddan, number of capsules per plant, seed yield
per plant and per faddan followed by Sakha1 and S3. Slight differences between fannyard manure (FYM) and mineral fertilizer (M.F)
could be observed in all studied characters and these differences did not reach
the level of significance. 3.Straw yield per fad., seed yield/fad. and their related characters were significantly
increased by magnesium during both seasons   4.The differences between the effect of the two magnesium concentrations and
untreated (control) treatment were significant and the highest values of all
characters under study were obtained by 200 ppm of magnesium. Also, there are
significant differences between 100 and 200 ppm of magnesiurt' concentration.   The yield and yield components were not significantly respond 10 the triple
interaction. The maximum values of both flax yields (seed and straw) were
obtained with S2-FYM'200ppm Mg.   6.seed nitrogen, phosphorus and potassium contents were significantly increased
with (strain1) flax genotypes and mineral fertilizer had Significant effect on seed
content of P and K and inSignificant effect on N content. 7.Foliar spray significantly increased seed N,P and K content at the rate of 200 ppm
Mg. It can also observed that the maximum values of both seed content of
Nitrogen and phosphorus were obtained ",lith S2'FYM"200ppm Mg. while, the
highest value of seed content of potassium was obtained ••• lith S2'M.F· Mg
(200ppm.)