Set aside experiments 1989-1997

Field experiments on set aside were funded by the UK government and managed by ADAS at Boxworth, Drayton, Gleadthorpe, and High Mowthorpe between 1989 and 1997. Each site consisted of replicated small plots on which a range of set aside treatments, including natural regeneration and various sown covers, were established for five years, after which most of the plots returned to arable cropping. Several plots remained in arable cropping throughout the period as a comparator.

SCRI's contribution was initiated by Harry Lawson, now retired, and consisted of measuring the seedbank by the extraction method at the beginning, after the five years of set aside and after two further years following return to arable cropping. The experiment demonstrated the strong effect of local conditions on the arable seedbank, notably that the seedbank can be amplified or suppressed by the management imposed largely irrespective of the species present. The results contributed to the understanding of the seedbank's role as both the weed burden and the arable plant biodiversity.

Contact: Geoff Squire

Papers and reports

No papers on seedbanks were produced specifically on this experiment. The data, along with other records from the seedbank archive, contributed to the assessment of the baseline in the Farm Scale Evaluations (GM crop trials). The results from the set aside experiment are being re-examined in 2009 as part of the Sustainable Systems project, since they provide one of the few instances in which the resistance and resilience of the seedbank can be assessed over a run of years.