K. Susan John, and R. T. Remya Raj. “Effect of Various Soil Amendments on Soil PH and Exchangeable Ca at Different Depths in the Identification of a Suitable Liming Material for Tannia (Xanthosoma Sagittifolium L. Schott) in an Ultisol, Kerala, India”. JOURNAL OF ROOT CROPS, vol. 48, no. 1 & 2, Mar. 2024, pp. 26-34, https://journal.isrc.in/index.php/jrc/article/view/625.