%0 Article
%T Behaviour of certain phosphorus and potassium compounds in a sedge peat soil.
%A Lumme, Ilari
%A Yli-Halla, Markku
%D 1987
%J Silva Fennica
%V 21
%N 3
%R doi:10.14214/sf.a15474
%U https://silvafennica.fi/article/5317
%X <p>The solubilityof various phosphorus and potassium compounds in a sedge peat soil was studied in an incubation experiment aimed at screening potential fertilizers for the cultivation of fast-growing willows. (KPO<sub>3</sub>)n proved not to be a source of the slow-released K regarded as most desirable for this kind of cultivation as it was hydrolysed completely in the soil during incubation. Phosphorus from easily soluble or hydrolysable compounds (superphosphate, KH<sub>2</sub>PO<sub>4</sub>, (KPO<sub>3</sub>)n) was bound in the soil largely by Al and Fe and elevated the level of readily soluble P considerably, whereas rock phosphates were found to be practically unchanged after incubation and did not contribute to the readily soluble P in the soil. Apatites proved to be quite insoluble and are therefore assumed to be unsuitable as P fertilizers for fast-growing willows, which have a high nutrient demand.</p>
<p>The PDF includes an abstract in Finnish.</p>