KENTUCKY BLUE GRASS. 105 



grass or both, or indeed any kind of clover, it should 

 usually be sown before the harrow. The necessity for 

 using a roller will depend upon conditions. And there 

 may be some soils, as for instance, very stiff clays, 

 where such treatment would injure the land through 

 poaching, unless alternate freezing and thawing fol- 

 lowed quite soon. This method of renewal has succeeded 

 well on prairie soils. But the attempts to improve blue 

 grass pastures by simply running the harrow over them 

 have not proved markedly successful. 3. That when 

 the stand of the seed on blue grass pastures is thin or 

 spotted, it may be renewed in some instances by simply 

 adding more seed. In other instances by pasturing so 

 lightly that some seed will mature and fall, and through 

 its subsequent distribution by the winds will strengthen 

 the pasture. And in yet other instances by disking those 

 portions of the pasture with but little grass on them 

 and sowing and adding more seed along with rye or some 

 other grain. When more seed is scattered over the 

 pastures, the early autumn will probably prove the best 

 season for sowing it, using, if possible, fresh seed, and 

 harrowing or not harrowing, according to conditions. 

 The next most favorable season for doing this is the 

 early spring. Winter rye will usually be found the most 

 suitable grain to sow on the disked portions of pastures, 

 as, if sown in the early fall, it will furnish grazing both 

 fall and spring, while the grass sown along with it is be- 

 coming rooted. And 4. Blue grass pastures may be 

 greatly strengthened by spreading over them farmyard 

 manure, fresh or -at any stage in its decay. The man- 

 nure may be applied at any season of the year. But 



