igo6.] Manuring of Crops in Rotations. 



93 



Suggestions as to Manuring. — When practically all the 

 manures for a rotation of crops are applied to the root crop 

 it is evident from the results that the needs of all the crops 

 must be considered, as well as the special requirements of the 

 first crop (roots), to which too much attention is now commonly 

 given. 



Artificials Only, — All the results show the imperative need of 

 a potash manure on light and even on loam soils when dung is 

 not used, and also indicate that basic slag is usually better in 

 the long run than superphosphate, but that either of these is 

 more economical than dissolved bones or bone meal. It is also 

 clear that a larger amount of phosphoric acid should be used in 

 slag than in superphosphate, when either is applied in the quan- 

 tity which will give the best results. It is probable that 4 cwt. 

 basic slag, cwt. superphosphate, | cwt. nitrate of soda, \ cwt. 

 sulphate of ammonia, and i cwt. muriate of potash (50 percent, 

 potash), all applied in the drills, represent a fair dressing for 

 swedes and turnips in the North of England, where so many of 

 the soils are poor in lime. 



For potatoes the potash manure might be increased by one- 

 half and either a light topdressing of nitrate added when the 

 crop is above the ground, or \ \ cwt. of a good guano added in 

 the drills. 



For mangels there should be added 2 cwt. common salt in the 

 drills, and ij cwt. nitrate of soda, in two topdressings, after the 

 crop is above the ground. 



For cabbages a dressing somewhat the same as for mangels is 

 likely to be useful. 



On the lighter soils a dressing of 3 cwt. slag and 2 cwt. kainit 

 on the young seeds, immediately the corn crop is removed^ is 

 likely to be useful, especially if clover is abundant. If in the 

 spring the young seeds are found to be principally grasses, f cwt. 

 of nitrate as a topdressing will be useful. 



Dung and Artificials. — When good dung is used in moderate 

 quantities, the need of a potash manure largely disappears, 

 even on the lighter classes of soils. Good returns may also be 

 expected from medium dressings of dung, especially on thin 

 hungry soils, Heavier dressings may also give good returns, 

 but not to the same extent per ton as lighter dressings. Dung 



