Nitrogen Status of Soil and Plants in Apple Orchards of Quetta Valley, Pakistan: Short Communication: Nitrogen Status in Apple Orchards. Biological Sciences - PJSIR, [S. l.], v. 58, n. 1, p. 54–55, 2015. DOI: 10.52763/PJSIR.BIOL.SCI.58.1.2015.54.55. Disponível em: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/83. Acesso em: 10 mar. 2026.