Titlebook: Nutrient Uptake and Cycling in Forest Ecosystems; Proceedings of the C L. O. Nilsson,R. F. Hüttl,U. T. Johansson Conference proceedings 199

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Quantification of ammonium sorption in acid forest soils by sorption isothermsere established with distribution coefficients ranging from 0.17 to 0.35 for NH.. with highest values in the O horizons. While exchangeable NH.. in acid forest soils is considered to be only a minor long-term sink for deposited NH.., it has its relevance in the seasonal dynamics and transport of NH.

AVOID

Soil changes in different age classes of Norway spruce (, (L) Karst.) on afforested farmlandclasses, with Y40 and Y55 having the largest amounts. A reference layer (15–20 cm) was used in calculating the amount of soil C that had accumulated in the horizon since afforestation, being about 10 tonnes ha. of C in Y20 and 19 tonnes ha. in Y40 and Y55..Cation exchange capacity (CEC) and base sat

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Monitoring uptake and contents of Mg, Ca and K in Norway spruce as influenced by pH and Al, using miling, (ii) the material taken up from the labelling solution into the plant and (iii) any material released by the plant into the labelling solution..In single-root labelling experiments, roots of three-year-old spruce trees, grown in nursery soil, were exposed to various pH conditions. The exchange

DIKE

Effects of ammonium sulphate application on the chemistry of bulk soil, rhizosphere, fine roots and nium ions may have replaced these elements in the soil organic matter. The NS treatment reduced Mg concentration in fine roots in all layers in 1990. The Al concentrations in the rhizosphere and bulk soil were higher in NS plots in all layers, except at 0–10 cm depth, both in 1989 and 1990. The Al c