224 CLOVERS 



favors the view that the roots of the mammoth 

 variety can better resist such influences than those 

 of the common red. 



This clover, Hke the common red, is not well 

 adapted to hungry, sandy soils, to the blow soils 

 of the prairie, to the muck soils of the watery slough, 

 or to the peaty soils of the drained muskeg. 



Place in the Rotation. — The place for mammoth 

 clover in the rotation is much the same as for the 

 medium red variety. (See page 70.) It may, there- 

 fore, be best sown on a clean soil ; that is to say, on 

 a soil which has grown a crop the previous season 

 that has called for clean cultivation, as, for instance, 

 corn, potatoes, sorghum, or one or the other of the 

 non-saccharine sorghums, field beans, soy beans, 

 cow peas and field roots. But it is not so necessary 

 that it shall be made to follow either kind of beans or 

 cow peas as the other crops named, since these have 

 already gathered nitrogen, which is more needed by 

 leguminous crops. This clover should rather be 

 grown in rotations where more nitrogen is wanted, 

 when the soil will profit by increased supplies of 

 humus^ and where strong plants are wanted, the 

 root growth of which will have the elfect of render- 

 ing the cultivated portion of the soil more friable 

 when stiff and more retentive when sandy, and that 

 will have the effect of opening up many little chan- 

 nels in the subsoil when the roots decay, through 

 which an excess of surface water may percolate into 

 the subsoil. It may precede such crops as revel in 

 humus and that feed ravenously on nitrogen. .These 

 include all the small cereals, corn and all the sor- 



