1. Dillard, S.L., Wood, C.W., Wood, B.H., Feng, Y., Owsley, W.F., and Muntifering, R.B. 2015. Effects of nitrogen fertilization on soil nutrient concentration and phosphatase activity and forage nutrient uptake from a grazed pasture system. Journal of environmental management, 154, 208-215. 2. Jones, C. and Jacobsen, J. 2001. Plant nutrition and soil fertility. Montana State University-Bozeman, 406 pp. 3. Manzano, M.G. and Navar, J., 2000. Processes of desertification by goats overgrazing in the Tamaulipan thenscrub (matorral) in north eastern Mexico. J. Arid Environ. 44: 1-17. 4. Reeder, J.D., and Schuman, G.E. 2002. Influence of livestock grazing on C sequestration in semi-arid mixed-grass and short-grass rangelands. Environmental Pollution, 116(3), 457-463. 5. Rupperecht, D., Gilhaus, K and Holzel, N. 2016. Effect of year-round grazing on the vegetation of nutrient poor grass and heath lands Evidence from a large scale survey. Journal of Agricalture, Ecosystems and Environment. 1-7. 6. Sandhage-Hofmann, A., Kotzé, E., van Delden, L., Dominiak, M., Fouché, H.J., van der Westhuizen, H.C., and Amelung, W. 2015. Rangeland management effects on soil properties in the savanna biome, South Africa: A case study along grazing gradients in communal and commercial farms. Journal of Arid Environments, 120, 14-25. 7. Tefera, S., Snyman, H. A. and Smit, G.N. 2007. Rangeland dynamics in southern Ethiopia: botanival composition of grasses and soil characteristics in relation to landuse and distance from water in semi-arid Borana Rangelans. Journal of Environmental Management. 85(2): 429- 442. 8. YHoogendoorn. C.J., Newton, P.C.D., Devantier, B.P., Rolle, B.A., Theobald, P.W and Lioyd- west, C.M. 2016. Grazing intensity and micro-topographical effects on some nitrogen and carbon pools and fluxes in sheep-grazed hill country in New Zealand , Journal of Agricalture, Ecosystems and Environment. 217. 22-32. 9. Zhao, J., Lia, X., Lib, R., Tianc, L. and Zhang, T. 2016. Effect of grazing exclusion on ecosystem respiration among threedifferent alpine grasslands on the central Tibetan Plateau. Ecological Engineering 94, 599-607. 10. Zhua, G., Denga, Lei. Zhang, X. and Shangguan, Zh. 2016. Effects of grazing exclusion on plant community and soilphysicochemical properties in a desert steppe on theLoess Plateau, China. Ecological Engineering. 90. 372-381.
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