RAKESH KUMAR, Brijesh Yadav, R.S. Khamparia and. Effect of Zinc and Organic Matter Application on Various Zinc Fractions under Direct-seeded Rice in Vertisols. Journal of the Indian Society of Soil Science, India, v. 61, n. 2, 2013. Disponível em: https://epubs.icar.org.in/index.php/JISSS/article/view/32795. Acesso em: 19 oct. 2025.