Fig. 1. Flux rate of CH₄ from swine manure management systems differing in volatile solids loading rate as determined by the theoretical profile shape micrometeorological method and using the tunable diode laser method. (A) CH₄ flux over a 30-h period from a swine manure lagoon (0.12 kg volatile solids d^-1 m^-3) and over a 25-h period for a swine manure basin (37 kg volatile solids d^-1 m^-3). The time period between CH₄ measurements for sites was approximately 16 h and is indicated by the broken x axis. (B) One-way analysis of variance (ANOVA) (t-test) for CH₄ flux data and the Tukey–Kramer HSD means comparison table showing the absolute difference in the means minus the least significant difference (alpha level = 0.05)