AND R. CHANDRA, Yeshpal, R.S. Sachan. A Comparative Study on the Calibration Systems of Soil-Test based Fertilizer Recommendations for Toria (Brassica campestris L.) in a Mollisol. Journal of the Indian Society of Soil Science, India, v. 62, n. 1, 2014. Disponível em: https://epubs.icar.org.in/index.php/JISSS/article/view/41245. Acesso em: 6 jun. 2026.