Effect of horizontal flushing on the reclamation of sodic soils and yield of fodder crops after gypsum application
2001
Izhar-ul-Haq | Habib-ur-Rahman (Agricultural Research Inst., Tarnab (Pakistan)) | Niazi, B.H. | Salim, M.
A set of field experiments was conducted at three sites (Prang and Dosehra, District Charsadda and Aman Kot, District Peshawar) to study the effect of flushing the irrigation water after gypsum application to reclaim the sodic soils. Gypsum a 100% of gypsum requirement (GR) was applied at Prang and Dosehra. The irrigation water was flushed out after 12, 24 and 48 h. There was no flushing in the plots to represent the control (conventional) treatment. Two gypsum treatments were applied @ 100 and 50% GR at Aman Kot with the same flushing time. Maize was cultivated at Prang, berseem at Dosehra and dhancha at Aman Kot. The crops were harvested at maturity. Yield of fodder was. recorded at the harvest time. Fodder yield increased significantly at 5% level of probability with 24 and 48 h with 100% gypsum application at Prang. Maximum fodder yield recorded at Prang Charsadda was 34583 kg ha-1 while minimum fodder yield i.e. 20625 kg ha-1 with control. Similar results were also obtained at Dosehra and Aman Kot. At Aman Kot, 50% GR with 24 h flushing time gave best results. Soil parameters such as pH, ECe and GR decreased as the flushing time increased. The study showed that relatively greater amount of water is required for enhancing reclamation of sodic soil when higher rates of gypsum are applied.
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