M.V. Singh, R.H. Wanjari, P. Singh, R. Singh and D.K. Verma, A.K. Shukla, S.K. Behera,. “Evaluation of Zinc Polyphosphate As an Alternative Source of Zinc Fertilizer for Wheat (Triticum Aestivum L.) Crop Cultivated in a Vertisols of Central India”. Journal of the Indian Society of Soil Science, vol. 63, no. 4, Feb. 2016, https://epubs.icar.org.in/index.php/JISSS/article/view/56344.