caa a22 4500 477111378 CHVBK 20180405111610.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF00009340 doi (NATIONALLICENCE)springer-10.1007/BF00009340 Leaf litter ash alkalinity and neutralisation of soil acidity [Elektronische Daten] [A. Noble, Irene Zenneck, P. Randall] Soil acidification is a major factor limiting the sustainability of agricultural production systems throughout the world. Liming may not always be economically possible and therefore alternative methods or complementary methods of amelioration are required. Leaf litter collected from several tree species was examined for ash alkalinity (as an estimate of organic anion content) and ability to ameliorate an acid soil. Ash alkalinity measured by titration of the ash and excess cation values obtained by calculation as the difference between cation and anion content were correlated. Values obtained by the latter method ranged from 247 cmol c kg-1 for Melia azedarach (white cedar) to 36 cmol c kg-1 for Eucalyptus globoidea (white stringybark). There was a significant linear correlation between ash alkalinity and the Ca concentration in the litter. When added to an acid soil (pH 4.04 measured in 0.01 M calcium chloride) and incubated for 8 weeks, leaf litter raised the pH. Species differed markedly with Melia azedarach having the greatest effect. The increase in pH was proportional to the quantity of ash alkalinity (organic anions) added, expressed as calcium carbonate equivalents. Aluminium levels on the exchange complex were lowered by treatment with leaf litter through direct precipitation of a solid phase and again Melia azedarach litter was most effective. There was also indirect evidence of organo-Al complexes affecting the concentration of monomeric Al in soil treated with litter from Liquidambar styraciflua (liquidambar), Quercus robur (English oak) and Pinus radiata (radiata pine). Kluwer Academic Publishers, 1996 aluminium nationallicence ash alkalinity nationallicence soil acidity nationallicence soil amelioration nationallicence tree litter nationallicence Noble A. CSIRO Division of Plant Industry, GPO Box 1600, 2601, Canberra, ACT, Australia aut Zenneck Irene CSIRO Division of Plant Industry, GPO Box 1600, 2601, Canberra, ACT, Australia aut Randall P. CSIRO Division of Plant Industry, GPO Box 1600, 2601, Canberra, ACT, Australia aut Plant and Soil Kluwer Academic Publishers 179/2(1996-02-01), 293-302 0032-079X 179:2<293 1996 179 11104 https://doi.org/10.1007/BF00009340 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00009340 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Noble A. CSIRO Division of Plant Industry, GPO Box 1600, 2601, Canberra, ACT, Australia aut NATIONALLICENCE 700 1- Zenneck Irene CSIRO Division of Plant Industry, GPO Box 1600, 2601, Canberra, ACT, Australia aut NATIONALLICENCE 700 1- Randall P. CSIRO Division of Plant Industry, GPO Box 1600, 2601, Canberra, ACT, Australia aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 179/2(1996-02-01), 293-302 0032-079X 179:2<293 1996 179 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer