Mar 1, 2018 · The changes in chemical properties of composts were evaluated at different stages of composting (Table 1).Total C contents and labile pool 1 (LP1) of decomposable plant material (DPM) gradually decreased from the initial stage of composting to 35 DAI (394.7 g kg −1 –359.1 g kg −1 and 302.5 g kg −1 –239.9 g kg −1, respectively).