Relation of Water and Gypsum Movement in Soil with Different Discharges of Drip Irrigation. | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 16, Issue 2, June 2016, Pages 153-162 | ||
| Authors | ||
| Emad T.D. AL-Taie; Ramzi M. Shihab; Abdulwahab A. AL- Kayssi | ||
| Abstract | ||
| Field experiment was conducted to study the relation between movement of water and gypsum and discharge of drip irrigation in gypsifereous soil .Emitters with discharge of 2 , 4 and 8 (L.hˉ¹) were used . Soil samples with gypsum from 85 g. Kgˉ ¹ of surface, soil layer(0-5 cm) and subsurface soil layer (5 - 40 cm) were taken from the field of College of Agriculture -Tikrit university. The samples were air dried and passed through a sieve with 0.2 cm opening .The soil samples were packed and stratified to simulate field conditions in a PVC columns with 18.8 cm inner diameter and 55 cm length . The drip irrigation system was installed and calibrated under pressure of 100 kPa . The efficiency of drip system were 90 , 97 and 97 % for emitters of 2 , 4 and 8 (L.hˉ¹) . The experiment was carried out into two separate groups of columns . in the first group the distribution of water in the soil columns were studied . Volumetric water content ( | ||
| Keywords | ||
| Water; gypsum movement; discharges; drip irrigation | ||
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