SOILS 



whether we know just how they do it or not. We can 

 spend our time to better advantage by helping both in 

 the field where the work is to be done: by opening the 

 soil that air (and hence nitrogen) may be passed to them 



BACK OF GOOD TILLAGE IS THE WELL-BRED FARM HORSE 



in abundance, by keeping the soil mellow and fine and 

 sweet, that the little workers in the darkness below may 

 work with advantage to themselves and with profit to 

 their master. 



