and J. Prasad, A.K. Pandey, Vipin Kumar. 2016. “Effect of Continuous Cropping and Fertilization on Sulphur Fractions and Their Contribution to Sulphur Uptake under Rice-Wheat System in Calciorthents”. Journal of the Indian Society of Soil Science 64 (2). https://epubs.icar.org.in/index.php/JISSS/article/view/62536.