Suo - Mires and peat vol. 36 no. 3 | 1985
Maa-ja neulasanalyysit havupuiden kasvun kuvaajina.
English title: Soil and needle analyses as indicators of tree growth.
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Tekijät
A comparison of soil and needle chemical analysis in describing tree growth was made using correlation analysis. Nutrient contents in the soil were poorly correlated with tree growth on mineral soils, while needle analysis was found to be more useful in tracing nutrient deficiences. Plant nutrient contents in the poor types of peat studied correlated rather closely with pine growth but the nutrient contents of needles did not explain the variation in growth to the same degree. This indicates that soil testing may be useful when tracing nutrient deficiences on poor peat soils. On mineral soils, instead, needle analysis may be preferable.
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Sippola,
Sähköposti:
ei.tietoa@nn.oo
- Erviö, Sähköposti: ei.tietoa@nn.oo
- Tares, Sähköposti: ei.tietoa@nn.oo
Soiden hyväksikäytöstä Saksan demokraattisessa tasavallassa.
English title: Peatland utilization in German Democratic Republic.
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Tekijä
The paper discusses the nature of peatlands, peatland utilization and the research activity in this field in the German Democratic Republic. The discussion is based partly on literature and partly on a study tour the author took to the GDR in August 1984. A report in English delivered over to the Academy of Finland and the Academy of Science in the GDR who financed the trip is available at request from the author.
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Päivänen,
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ei.tietoa@nn.oo
Viljelyn vaikutus turpeen ravinnepitoisuuteen.
English title: Effect of cultivation on the nutrient status of peat soils.
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Various effects of cultivation on the properties of peat soils included an increase in the bulk density of top soil. Rises of pH and exchangeable Ca and Mg were attributed to liming. Increases in the available contents of other macro- and micronutrients due to fertilization and other cultivation practices were most substantial in the topsoil but also reached the deeper soil horizons.
In the cases of most nutrients the original trophy of the peat was still distinguishable after several years of cultivation.
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Urvas,
Sähköposti:
ei.tietoa@nn.oo
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