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Assessment of the Effect of Glycine, Oxalic Acid and Nitrogen-Phosphorus-Potassium (NPK) Fertilizer as Nutrient Supplement Using Phosphate and OxalicAcid as Indices. Pak. J. Anal. Environ. Chem. [Internet]. 2020 Jun. 28 [cited 2025 Jul. 3];21(1):102 – 106. Available from: https://pjaec.pk/index.php/pjaec/article/view/127