P. Deb Roy, D.P. Dutta, U. Baruah, K.D. Sah, S.K. Singh, D.C. Nayak and S.K. Ray, S. B. P. R. S. P. S. R. R. J. (2018). Forms of Acidity in Soils Developed on Different Landforms along an Altitudinal Sequence in Nagaland, India. Journal of the Indian Society of Soil Science, 66(2). https://epubs.icar.org.in/index.php/JISSS/article/view/82997