OCTOBER. 



lures are often caused by it, though attributed to 

 other circumstances. It is a subject too ample, 

 fullv to discuss in a work of this nature; but the 

 following hints may have their use. 



1. An additional depth should first be gained in 

 autumn, that a successive change of seasons may 

 take effect in atmospheric influences, before any 

 seed is ventured in the raw stratum brought up. 



2. The quality of that stratum should be exa- 

 mined ; it is sometimes sterile by reason of an acid, 

 discoverable by boiling in water, and putting that 

 water to the test of blue infusions. 



3. Animal and vegetable manures cannot be 

 buried: at whatever depth they are deposited, their 

 constant tendency is to rise to the atmosphere. 



4. Fossil manures are extremely liable to be bu- 

 ried, having a constant tendency downwards. Chalk, 

 marl, and clay, are sufficiently soluble, or so mis- 

 cible with water as to sink in a regular mass, and 

 are sometimes found much below the path of the 

 plough. 



5. In soils of a poor hungry quality, there should 

 be some proportion observed between the depth of 

 ploughing and the quantity of manure usually 

 spread ; but this does not hold good upon better 

 soils. 



(3. Soils are rarely found that ought not to be 

 ploughed, in common, six inches deep; many ought 

 to be stirred eight inches, and some ten. 



7. One deep ploughing (to the full depth) should 

 be given once in 12, IS, or 24 months; if this be 



secured, 



