Four rates (0, 36, 75, and 11 2 DT/A)of both old and new pulp-mill sludges were tested in a greenhouse for impact on survival and growth of seedlings of loblolly pine (Pinus taeda L). After one growing season no meaningful differences were detected for seedling survival and growth, number off lushes, and decomposition rate for old and new sludges regardless of rate. Seedling foliage showed increases in Mg and Ca and sludges exhibited high pH and increased salinity.
Yeiser, Jimmie L.
"Seedling Response in a Greenhouse to Four Rates of Old and New Paper Mill Sludge,"
Journal of the Arkansas Academy of Science: Vol. 42
, Article 29.
Available at: http://scholarworks.uark.edu/jaas/vol42/iss1/29