26 

 CLOVER HAY. 



Two tons, or 4,000 Ibs., of dried clover may be considered an 

 average crop per acre. This amount -contains : 



Ammonia 52 00 Ibs. 



Phosphoric Acid .. .. 19.76 " 

 Sulphuric Acid 7.50 



Lime 75.00 Ibs. 



Magnesia 21.00 " 



Potash... ...80.69 " 



Silica 18.65 Ibs. 



Clover requires a large amount of potash and ammonia, while 

 the amount of silica required is small. Great benefits are real- 

 ized by growing this crop; it sends its roots deep into the soil, 

 and brings up the phosphate and sulphate of lime, also potash 

 and magnesia; and when the clover is ploughed under, as a 

 green manure, it furnishes a large amount of the nitrogen re- 

 quired for a heavy crop of wheat. 



All root crops require a rich soil to do well. Twenty tons of 

 turnips or carrots, with the tops which is a large crop for an 

 acre require : 



Turnips. Carrots. 



Ammonia 42.00 Ibs. 48.00 Ibs. 



Phosphoric Acid 45.00 " 39.00 " 



Sulphuric Acid 50.00 " 57.00 " 



Lime 90.00 " 197.00 " 



Magnesia 14.00 " 29.00 " 



Potash 140.00 " 134.00 " 



Silica 55.00" 60.00 " 



Tobacco and cotton require a rich soil to grow luxuriantly, 

 as the following table, showing the amounts, in pounds, of inor- 

 ganic elements contained in 1,000 Ibs. of the stems and leaf of 

 tobacco, and the fibre, seed, and stalk of cotton, in their air- 

 dried state, will &how : 



Cotton, 



We regret that we could not obtain reliable analyses of cotton 

 and tobacco, showing the amount of nitrogen or ammonia re- 

 quired. The reader can see that in raising tobacco, a large 

 amount of lime and potash is required, while the amount of 

 phosphoric acid is small. The cotton plant requires more phos- 



