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On Changes in Inputs and Outputs of Agricultural Mineral Nutrients (e. g. Ca, Mg, K and Si) in Finland Between 1950-75 - with Discussion on Problems and Solutions

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  • Töysä T

    (Licentiate of Medicine, Specialty General Practice, Retired, Student of Eastern Finland, Finland)

Abstract

The role of pure or semi-pure mineral elements has changed in the nutrition of agricultural soils during the 20th century. According to an old database potassium mineral fertilizers, K.fm, composed in the 1920’s ca 8 % and manure (recycled, rcl), K.rcl ca 92 % of the total potassium fertilization (K.ft). In the 1970’s the proportion of K.fm increased upto little over 70 %. About similar increase occurred in other main mineral nutrients (N, nitrogen and P, potassium).

Suggested Citation

  • Töysä T, 2024. "On Changes in Inputs and Outputs of Agricultural Mineral Nutrients (e. g. Ca, Mg, K and Si) in Finland Between 1950-75 - with Discussion on Problems and Solutions," Biomedical Journal of Scientific & Technical Research, Biomedical Research Network+, LLC, vol. 54(3), pages 46067-46077, January.
    • Handle: RePEc:abf:journl:v:54:y:2024:i:3:p:46067-46077
    DOI: 10.26717/BJSTR.2024.54.008570
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