DHILLON, R.S. et al. Effect of spacing on crop yield and soil nutrient status under poplar based agroforestry system in semi-arid ecosystem. Indian Journal of Agroforestry, India, v. 19, n. 1, 2020. Disponível em: https://epubs.icar.org.in/index.php/IJA/article/view/102977. Acesso em: 9 jun. 2026.