1911.] PUBLIC DOCUMENT — No. 31. 17 



farm labor may render it rather im})racticable to l)reak tliem 

 up and reseed them frequently. Under such conditions, such 

 fields as we are considering on many farms are simply neglected. 

 The product of hay soon sinks to less than a ton to the acre and 

 hardly pays the cost of cutting. For such fields the system of 

 to})-dressing with slag meal and a ])otash salt, either without 

 nitrate of soda or in connection with a small amount of that 

 material is likely to be profitable. 



Method of applyixo Fkktilizek.s. 

 In the ex]ieriments to Avhich reference has been made, the 

 fertilizers have iuvai-iably been applied in spring, and this will 

 probably, as a rule, be the best season. It should be the rule 

 to make the apjilicatiou at about such time as grass fairly be- 

 gins to grow, and this in average seasons will usually l)e be- 

 tween about the 20th of April and the 1st of May. 



