[1] Rmheld V, Kirkby E A. Plant and Soil, 2010, 335(1-2): 155.
[10] Shaikh K, Memon K S, Memon M, et al. Akhtar. Soil & Environ., 2007, 26(1): 1.
[16] Singh K, Bansal S K. Communications in Soil Science and Plant Analysis, 2013, 44(8): 1282.
[19] Singh B, Goulding K W. European Journal of Soil Science, 1997, 48(4): 651.
[20] Hoffland E, Giesler R, Jongmans T, et al. Ecosystems, 2002, 5(1): 11.
[21] Pernes-Debuyser A, Pernes M, Velde B, et al. Clays and Clay Minerals, 2003, 51(5): 577.