SANDHU, I S; SHARMA, A R; SUR, H S. Yield performance and heat unit requirement of wheat (Triticum aestivum) varieties as affected .by sowing dates under rainfed conditions. The Indian Journal of Agricultural Sciences, Delhi, India, v. 69, n. 3, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/26415. Acesso em: 28 oct. 2025.