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acid acre applied areas average bales beds Bogalusa bordeaux mixture brown spot burning cankers carbon disulfide cones cost culling damping-off dewinged disease drought effective estry feet fertilizer foliage Forest Expt Forestry fungicides fusiform rust gallons germination germination tests green manure grubs hardwoods height growth illus inches increase infection initial survival injury Johnson Tract Jour kill kiln larvae less lifting lings loblolly pine longleaf pine longleaf seedlings mixture moist mole crickets mycorrhizae nursery soil nursery stock Nurseryman nutrient peat percent percentage pine plantations plantable plantations planter pounds pruning reduce require samples sand scale insects seed lots seedbed shortleaf pine slash pine South southern pine nursery southern pine region southern pine seed sowing spacing species spray stands storage subsamples sulfate surface temperature thinning tion total number trays treatment trees U. S. Dept U. S. Forest Service usually weeds weight