Karin Hamnér

TL;DR: Investigating the influence of N fertilization on the temporal accumulation pattern and concentrations of nutrients during the life cycle of a winter wheat crop grown in a cool temperate climate suggests the high N accumulation rates in high-yielding crops are associated with increased demands also of other nutrients, in terms of both increased amounts and tissue concentrations.

TL;DR: In this paper, the authors tested the hypothesis whether fertilization has an impact on subsoil development using data from two long-term soil fertility experiments and found that the upper sub-soil of an N-fertilized treatment had more soil organic matter, darker colour, more aggregation, more fine roots and was 10 cm thicker than that of a no-N treatment.

TL;DR: In this paper, the long-term use of manure and sewage sludge on trace element composition of cereal grain samples from on-going field experiments was investigated, and it was concluded that added trace metals present in organic fertilizer are not easily available to crops and that changes in soil properties, such as pH, and root proliferation often are of greater importance for crop uptake.

TL;DR: In this article, the authors investigated whether small additions to soil of primary paper mill sludge, a wood fibre residue from paper production (fibre sludge), caused temporary N immobilization and thereby reduced the amount of inorganic nitrogen leached from agricultural land.