48 JOURNAL OF THE EOYAL HORTICULTURAL SOCIETY. 



fore almost a hopeless task to try to destroy large areas of docks 

 by spudding (though this plan might succeed were the spudding 



Fig. 20. — Seedling of Knotgrass (Polygonum Aviculare L.). 

 a, cotyledon stage; b, later stage showing first leaves. Natural size. 



sufficiently frequent). In arable land docks must be turned out by 

 ploughing and cultivating, and be burnt after collection by hand. The 



Fig. 21. — Seedling of Black Bindweed (Polygonum Convolvulvus L.). | 

 a, cotyledon stage; b, later stage showing first leaves. Natural size. I 



docking iron too should be employed both on arable and grass land in |f 

 damp weather^ when many docks may be raised whole, or nearly so. If : 



