The Common Poppy (Papaver rhoeas) has been relegated to the margins of the huge prairie-like fields created by intensive farming. By that reckoning Poppies are an arable weed. 

 En route to the Pegsdon Hills yesterday I came across the unusual sight of a whole field of Poppies. Perhaps they are being grown as a commercial crop but it may just be that the field was ploughed then neglected. Poppy seeds can remain viable for decades in the chalky soil then germinate when the ground is turned over.
 The yellow spires of Wild Mignonette (Reseda lutea) were almost as prolific as the Poppies. Likewise R. lutea is a wildflower of calcareous soils that germinates when disturbed. Poppies are an annual whereas Wild Mignonette is biennial or sometimes a short lived perennial. 

 And dotted among the reds and yellows were the flowers of White Campion (Silene latifolia), a common annual of hedgerows and field margins. The combination made for a spectacular blast of colour.