The experiment site is typically sown with a spring grain crop. Until 2008 the crop most plots were undersown with white clover (Trifolium repens) and weeds controlled mechanically. After 2008 herbicide based weed management commenced and white clover was undersown in one treatment only.
The soils are a sandy loam. A gradient in clay content across the field is present resulting in a minor difference in the mean clay content in the three replicate blocks (from 16.9% in block 1–14.3% in block 3).
temperate oceanic climate
Design period: (2002—)
Randomized complete block design
Plots are separated by 3m grass strips in order to avoid movement of soil between treatments
Number of blocks
Number of plots
Number of replicates
Number of harvests per year
The fertilizers were spread on land and incorporated by ploughing to approximately 20 cm.
Plot application: Whole plot
Clover undersown, no other fertilizers applied
S. López-Rayo, K.H. Laursen, J.D.S. Lekfeldt, F. Delle Grazie, J. Magid Long-term amendment of urban and animal wastes equivalent to more than 100 years of application had minimal effect on plant uptake of potentially toxic elements Agric. Ecosyst. Environ., 231 (2016), pp. 44-53