الفهرس 
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Abstract
Two field experiments were carried out during summer
seasons of 2010 and 2011 at the Experimental Farm at El-
Kassaien, Hort. Res. Station Ismalia Governorate, Egypt, to
study the effect of sowing dates and plant density on vegetative
growth, dry seed yield and its components as well as chemical
constituents of dry seed for snap bean plants cv. Nebrasica
grown in the newly reclaimed sandy soil. This experiment
included 12 treatments, which were the combinations between
three sowing dates (February 1st , March 1st and April 1st) and
four plant density (56 plants/m2, 40 plants/m2 , 28 plants/m2 and
20 plants/m2). . Planting of snap been on March 1st gave the maximum values of dry weight of different plant organs at
different stages of samples, total chlorophyll a+b, N,P and K
total uptake by plants, seed yield /m2 and total seed yield /fed.
in the two seasons.
Plant density of snap been at 20 plants / m2 had
significant effect on total dry weight / plant at 45 and 60 days
after planting in both seasons, chl. a, b and total chlorophyll
a+b in both seasons and N, P and K total uptake by snap bean
plant as well as 100 seeds weight , seed yield/ plant. On other
hand, yield of seeds per m2 and per fed. were significantly
increased by planting at 56 plants/m2 in both seasons.
The interaction between sowing date on March 1st and
plant density at 20 plants/m2 significantly increased total dry
weight/ plant at 45 and 60 days and exhibited the highest values
of N, P and K total uptake by snap bean plant as well as 100
seeds weight and seed yield/ plant. On the other hand, the
highest values of total dry seed yield per square meter and per
feddan were recorded with the interaction between planting on
1st March and planting at 56 plants/ m2.