Variation in the concentration of calcium with successive leaching times (a.T1; b.T2; c.T3; d.T4); e. The average values in sodic soil I after leaching four times; f. The average value in sodic soil II after leaching four times). Jinman Wang Zhongke Bai Peiling Yang 10.1371/journal.pone.0071011.g004 https://plos.figshare.com/articles/figure/_Variation_in_the_concentration_of_calcium_with_successive_leaching_times_a_T1_b_T2_c_T3_d_T4_e_The_average_values_in_sodic_soil_I_after_leaching_four_times_f_The_average_value_in_sodic_soil_II_after_leaching_four_times_/761995 <p>Variation in the concentration of calcium with successive leaching times (a.T1; b.T2; c.T3; d.T4); e. The average values in sodic soil I after leaching four times; f. The average value in sodic soil II after leaching four times).</p> 2013-08-01 03:09:52 Soil science Sustainable agriculture biotechnology Environmental biotechnology ecology Environmental protection Chemical reactions neutralization Environmental chemistry Soil chemistry Anion exchange capacity Physical chemistry Ion exchange Environmental sciences Environmental engineering calcium successive leaching times sodic ii