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Effects of urea and poultry manure combination on yield and quality of different lettuce (lactucasativa l.) Varieties in Chitwan, Nepal. SAARC J. Agri. [Internet]. 2019 Aug. 25 [cited 2026 Jul. 9];17(1):201-10. Available from: https://banglajol.info/index.php/SJA/article/view/42773