الفهرس 
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Abstract
The current study aims to evaluating the effects of two
irrigation systems (furrow and drip systems), two levels of
irrigation low quality water amount i.e., 100% and 75% of water
requirements and application of soil amendments (gypsum,
organic matter, humic acid and their combination) to improving
sodic soil properties and increasing the productivity of sugar beet
and maize crops.
Two field experiments for each two crops, sugar beet (Top
variety) were conducted in two successive winter seasons 28 and
30 September during 2010/2011 and 2011/2012, respectively.
Maize (Three way cross hybrid 2030 variety) were planted after
sugar beet harvested in summer seasons 5 and 6 April during
2011 and 2012, respectively. This experiments were conducted at
Ahmed Youssef Village, Monshaet Sinnoris, Sinnoris district,
Fayoum Governorate, Egypt (the latitude is 29 ͦ 28’ 47.19 N and
the longitude is 30 ͦ 49’ 49.62 E). Disturbed and undisturbed soil
samples collected from a soil profile representative to the area.
Three soil depths were sampled i.e., 0-20, 20-40 and 40-60cm.
Also, surface soil samples (0-30 cm) were collected from the area
of study prior to each growing season for some physical and chemical soil analyses.