low input

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

The Talisman low input experiments 1990-1996

TALISMAN was series of experiments funded by the UK government and managed by ADAS at High Mowthorpe, Drayton and Boxworth between 1990 and 1996. Each site consisted of replicated small plots in which crops of cereals and breaks were grown at full and half doses of herbicides, fungicides, insect pesticides and fertiliser.

SCRI's contribution was initiated by Harry Lawson, now retired, and consisted of measuring the seedbank in high and reduced herbicide plots. The seedbank was measured by the extraction method from cores of soil taken before the treatments were applied and after three and six years. In some reduced herbicide treatments, the seedbank increased more than 100-fold after the six years. Treatments and sites were compared in terms of seedbank community parameters derived from species-accumulation and similar devices. The results contributed to the understanding of the seedbank's role as both the weed burden and the arable plant biodiversity.

Papers and reports

Squire, G.R., Roger, S., Wright, G. 2000. Community-scale seedbank responses to less intense rotation and reduced herbicide input. Annals of Applied Biology 136, 47-57. doi: 10.1111/j.1744-7348.2000.tb00008.x

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