200 



green crops supply their place, and a regular and judicious rotation is 

 observed. 



In Michigan, winter wheat cannot bo put in after turnips, unless the 

 latter are pulled up before they are ripe, but spring wheat, barley, oats 

 or corn may succeed turnips with good effect. Many writers assert that 

 turnips are not an exhausting crop, but I certainly think they are. 



"Wheat always thrives best in new soil, but it is necessary that the 

 roots of the grasses should be perfectly decomposed in order that they 

 may furnish food for the young wheat plants. If the roots of grass, 

 &c., are not decomposed, they will very probably grow and rob the 

 wheat of the ingredients it requires for food. 



Soils composed principally of clay and lime are considered best 

 suited for the growth of wheat. Boussingault gives the following clas- 

 sification of wheat soils : 



Clay. Sand. Lime or Chalk. Humus. 



Clay and humus — rich wheat land, 74 10 4 11.5 



« « 81 6 4 8.5 



« " 79 10 4 6.5 



Marly soil — good wheat land, 40 22 36 4.0 



Argillaceous, " 58 36 2 4.0 



« " 68 38 .. 2.0 



Marly soil— wheat land, 56 30 12 2.0 



The following analysis by Dr. Antisell will be useful in showing the 

 composition of wheat soils. It is of an impoverished soil, in the town- 

 ship of Freehold, New Jersey. The ingredients it requires to render it 

 fertile are given. 



Requires. 



Organic matters, 4.50 9.V0 



Silicates, 87.60 



Alumina, 3.65 5.70 



Lime, 0.45 5.70 



Peroxide of Iron, 1.39 



Potash, 0.01 0.20 



Soda,.. -■ 0.08 0.40 



Chlorine, 0.06 0.20 



Sulphuric Acid, 0.12 0.20 



