1. College of Resources and Environment, Southwest University, Chongqing 400715, P.R. China
2. Department of Agronomy, Plant Sciences Faculty, Afghanistan National Agricultural Sciences and Technology University, Kandahar 3802, Afghanistan
3. Department of Soil and Agricultural Chemistry, Agriculture Faculty (Saba - Basha), Alexandria University, Alexandria 21611, Egypt
4. Department of Agronomy, Shaikh Zayed University, Khost 2501, Afghanistan
5. Directorate of Soil and Water Testing, Agriculture Research Institute, Quetta, Balochistan 37300, Pakistan