THE OLD, WORN-OUT SOILS 285 



Deep breaking of the soil, frequent and intelligent til- 

 lage these are the foundations of soil restoration. 



Do you send your plow deep into the soil? Perhaps 

 deep tillage is the sort of medicine your land needs. If 

 you have been accustomed to plow shallow, just try this 

 plan : the next time you plow, set your plow in such a 

 way that it will go deeper into the soil at least two 

 inches. And the next time go two inches more ; and con- 

 tinue to do this until you get a plowed body of land at 



WHAT HUMUS UOES IN THE SOIL 



least nine or ten inches deep. You better do this work 

 gradually, for you might injure your land by turning 

 to the surface a quantity too great to be purified and 

 aerated in a single season. Combine with this good plow- 

 ing the most thorough sort of culture; use every sort 

 of preparation tool that is needed to secure good tilth and 

 a good seed-bed. Thomas Tusser long ago expressed the 

 meaning in a quaint couplet : 



Good tilth brings seeds, 

 111 tilth, weeds. 



