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1
Soil compaction by the tractor in spring and its effect on soil porosity by Erkki Aura
Published 1983-03-01
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2
Phosphate desorption from soil in anion-exchange resin extraction by Erkki Aura
Published 1978-07-01
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3
Effect of the placement of fertilizer on the development of spring wheat by Erkki Aura
Published 1967-09-01
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4
Effects of soil moisture on the germination and emergence of sugar beet (beta vulgaris l.) by Erkki Aura
Published 1975-01-01
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5
Effect of residual nitrogen and fertilizer nitrogen on sugar beet production in Finland by Veikko Brummer, Erkki Aura
Published 1974-09-01
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