Fig. 4. Plant-available water in high-rate treatments and the nonamended control from April 1999 to April 2000. Preamendment 1999 represents one year after the first application. Postamendment 1999 represents 1.5 mo after second application. Preamendment 2000 represents one year after the second amendment application. Treatments within each date with the same letter were not significantly different ( = 0.05). Error bars represent ± one standard deviation. PMR, paper mill residuals; PMRB, paper mill residuals composted with bark; PMRC, paper mill residuals composted without a bulking agent.