[[1]. J.Angulo, L. Mahecha, S. A. Yepes, A. M. Yepes, G. Bustamante, H. Jaramillo, E. Valencia, T. Villamil and J. Gallo, Journal of Environmental Management 95, S203-S209 (2012).10.1016/j.jenvman.2010.09.022]Search in Google Scholar
[[2]. J. Lin, J. Zuo, R. Ji, X. Chen, F. Liu, K. Wang and Y. Yang, Journal of Environmental Sciences 24(7) 1288-1294 (2012)10.1016/S1001-0742(11)60927-3]Search in Google Scholar
[[3]. H. Bouallagui, Y. Touhami, R. Ben Cheikh and M. Hamdi, Process Biochemistry 40 989-995 (2005).10.1016/j.procbio.2004.03.007]Search in Google Scholar
[[4]. A.Nawirska and M. Kwasniewska, Food Chemistry 91, 221-225 (2005)10.1016/j.foodchem.2003.10.005]Search in Google Scholar
[[5]. Y. Jiang, S. Heaven and C.J. Banks, Renewable Energy 44, 206-214 (2012)10.1016/j.renene.2012.01.012]Search in Google Scholar
[[6]. T. Nemeth, O. Palmai and J. Horvath in Role offertilizers in sustainable agriculture - Proceedings (Ed. C. Hera, E. Schnug, M. Dumitru, A. Dorneanu), Bucharest, 2001, pp. 55-61]Search in Google Scholar
[[7]. C. Hera, A. Popescu and V. Mihaila in Soil fertilityand the future of agriculture in Europe (Ed. C. Hera, C. Kleps), The Publishing House of the Romanian Academy, Bucharest, 2006, pp. 25-38]Search in Google Scholar
[[8]. N.Lupascu, G.Popa and I.Tintisan, Ovidius Univ. Annals of Chem. 22, 67-70 (2011)]Search in Google Scholar
[[9]. M. Nicolaescu, N. Lupascu and E. Chirila, Environmental Engineering and Management Journal 8 (4) 911-914 (2009).10.30638/eemj.2009.131]Search in Google Scholar
[[10]. M. Nicolaescu, N. Lupascu and E. Chirila, Ovidius University Annals of Chemistry 18 (2), 171-173, (2007)]Search in Google Scholar
[[11]. N.J Njukeng, E.G. Nkeng, E.E. Ehabe and E Schnug, International Research Journal of Pure & Applied Chemistry 3(1), 22-31 (2013)]Search in Google Scholar
[[12]. M. Rus, M. Marghitras, T. Mihaiescu, I. Oroian and A. Dumitras - Agrochemistry (In Romanian), Ceres, Bucharest, 2005]Search in Google Scholar
[[13]. R. Lacatusu - Agrochemistry (In Romanian), Terra Nostra, Iasi, 2006]Search in Google Scholar