1. Abarghani A, Mostafaei M, Alamisaed K, Ghanbari A, Sahraee M, Ebrahimi R (2013) Investigation of calcium, phosphorous and magnesium status of grazing sheep in Sabalan region, Iran. J Agric Sci Technol 15:65–76
2. Anderson EW (1986) A guide for estimating cover. Rangelands 8:236–238
3. Aragón R, Oesterheld M (2008) Linking vegetation heterogeneity and functional attributes of temperate grasslands through remote sensing. Appl Veg Sci 11:117–130. https://doi.org/10.1111/j.1654-109X.2008.tb00210.x
4. Ashburn P (1978) The vegetative index number and crop identification, The LACIE Symposium Proceedings of the Technical Session, 843–850
5. Badripour H, Eskandari N, Rezaei SA (2006) Rangelands of Iran, an overview. Pooneh, Tehran