الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Field experiment was carried out on reclamation of a saline sodic
silty clay soil El-salam Canal water (EC 1.5 dSm-1
• SAR 7.1. Adj. SAR
16.0) was used in a field in south El-Hosoiniya Plain, north east of Delta,
Sharqueya Governorate. The aim was to asses the efficiency of
reclamation using four amendments, each at two rates. Materials were
gypsum ”Gn (8.0 and 10.0 tonlfed) sulphur ”sn (1.5 and 1.9 tonlfed.), lime
”Ln (4.6 and 5.8 tonlfed), and manured lime ”MLn (4.6 + 10.0 tonlfed) and
(5.8 + 10.0 tonlfed) for each material, rate 1 represents the gypsum
requirement GR. and rate 2 represents 1.25 GR. After reclamation, rice
was grown and yield was measured. El-Salam water was used adopting
intermittent leaching for 2 cycles. Each cycle comprised applying 600
m3j fed followed by 900 m3/fed with 2 weeks between water applications
per each cycle, and one month between the 2 cycles.
Original values of soil parameters before reclamation were: EC:
17.71 dSm-1 in top soil and 12.81 dsm” in subsoil, other comparable
parameters were: ESP: 38.9 and 40.1 ,pH: 8.1 and 8.0, SAR: 30.8 and
40.8 for topsoil and SUbsoil, respectively for each parameter. Application
with either surface or mixing in the top soil 0-15 an layer. ”MLn by
surface application with rate 1 reduced EC to 2.95 in topsoil and 3.74
..dSm-1 in SUbsoil, MG· or IIML·, (surface application with rate 2) reduced
soil pH. ilL· showed an increase in pH.
IIGII was the most efficient material in reducing soil sodicity
rendering SAR 10.7 and ESP 13.5 in topsoil. It also increased soluble
Ca++ IIML· reduced to 23.3.-xi ESP to 25.4 in the subsoil. The
comparative efficiency concerning reduction of sodicity (as ESP) of the 4
amendments. may be stated as follows (concerning response in the G-30
em. Sulphur; 80%; lime; 72%; mamredlime; 84%. Yield of grains of rice .
was 3.0 ”ML”, 2.7 ”S”, 2.5 ”G” and 1.6tonlfed. ”Ln, Yield of straw was 3.6
”ML”, 3.1 ”8”, 3.0 ”G” and 2.4 tonlfed al”. Such comparative efficiency
was calculated taking in consideration. the final ESP reached by the
alternative amendment companion with that of gypsum (in terms of %).
Regular annul or biannual or every 4-5 years application of ”G”
and manure should be done to improve soil fertility and increase soil
productivity. Lime may be used mixed with farmyard manure in order to
obtain effective response in reducing sodicity an increased yield of
crops SUbsequently grown after reclamation.