Analysis using pure water as the soil suspension: pH (H2O) of ground coffee into the shell. Put the ground coffee that fills the shell Ca (OH) 2 15% ground coffee that fills the shell put Na2S2O5 15% ground coffee, put a shell through the water. Soil containing shells, coffee soaked in 2% solution of Ca (OH) 2 soil to crust coffee soaked in 2% solution of Na2S2O5 in a ratio of shell coffee on earth 0.5: 1 and 1: 1 for 30 days was 6.12, 5.23, 6.26. , 7.93, 6.63, 7.13, respectively (in a ratio of 0.5: 1), and 6.72, 8.17, 5.62, 6.47, 7.73, 6.34, respectively.
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