Effects of acid-forming emissions on soil microorganisms and microbially-mediated processes /

Air pollution effects on vegetation, including forest ecosystems : proceedings of the Second US-USSR Symposium /

“…Such soils are not uncommon in the southeast¬ ern USA. An example of the natural acidifica¬ tion of a low activity clay soil is described in Table 1 (Wells, 1980). These unique data document how twenty years of pine plantation development reduced base saturation from about 40 to <10% in surface soils.…”

“…Chemical properties of an Appling series Udult at 5,11,15, and 20 years after planting of loblolly pine. Letters following numbers in each column indicate significant differences in soils sampled at different ages at p -0.05 (Wells, 1980 areas of North America and Europe (Reuss and Johnson, 1983). Depending on a soil's ex¬ change complex, such concentrations may depress pH of soil solutions due to cation ex¬ change reactions and the "salt effect" (Richter et al, 1987).…”

“…Such change in this soil-plant continuum will have ramifications on nutrient uptake, disease protection, water uptake, and nutrient cycling, and thus on ecosystem stability. Several recent reviews were used in the formulation of this paper and have been listed in the reference section (Anon., 1986;Jansen etal., 1988;Mathy, 1988;NCASI, 1987;Visser et al, 1987).…”

The effects of acid deposition on forests /

“…The effects of acid deposition on microbial activity have been reviewed extensively by others in the Acid Deposition Research Program (ADRP) (Visser et al 1987);…”

“…3.3.4.5 Effects on Mycorrhizae . This important subject has been reviewed in depth by others in the ADRP (Visser et al 1987), and therefore, little will be said here.…”