SOIL MANAGEMENT 



13 



appearance. It tends also to prevent grass from growing along 

 the soil line of each furrow. 



Several types of colter are used on sod or rooty ground for 

 cutting the furrow from the landside. All these should be placed 



Fig. 6. — Diagrams illustrating the effect of depth of plowing relative to width of 

 furrow on the final position of the furrow slice. The second and third are the 

 most satisfactoi-y. When set in this position the upper edge of the furrow slices 

 may be readily worked down to a seed bed without the interference of sod which 

 may have been turned under. JNIanure and turf are well distributed, without 

 breaking connection with the subsoil. Subsequent packing and preparation 

 should break down the lower edge of the furrow slice and bring the top soil in 

 close contact with the subsoil. — Cornell Reading Course. 



a little back of the plow point and slightly outside the line of the 

 landside, so as to cut a clear course at the moment when the 

 roots are drawn taut over the point. The rolling and blade 

 colters are attached to the beam. The rolling colter adds less to 

 the draft, and is more satisfactory than the blade colter where 

 there is much surface rubbish. Occasionallv a small fin colter 



