JAGGI, R C; SHARMA, RAMESH KUMAR. Evaluation of extractants for available sulphur in soils of Kangra Valley. The Indian Journal of Agricultural Sciences, Delhi, India, v. 69, n. 6, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/26827. Acesso em: 27 oct. 2025.