Fig. 2. Model II regressions between different techniques to measure labile soil C pools: (a) microbial C and light fraction C (P < 0.005), (b) microbial C and hydrolyzable C (P < 0.00001), (c) light fraction C and hydrolyzable C (P < 0.001), (d) Day 12 labile C and light fraction C (P < 0.001), (e) Day 12 labile C and hydrolyzable C (P < 0.0005), and (f) Day 12 labile C and microbial C (P < 0.005). All measurements were made on samples from the 0- to 10-cm soil depth.