Green Forage Crops 281 



dry matter, but that the gross yield shall be much greater 

 than in the former case. Hence, a liberal use of yard 

 manure need not be avoided, and heavier dressings of 

 nitrogen, which stimulates early leaf growth, may be 

 made. 



For both fodder-beets and sugar-beets, an application 

 to the acre of 40 pounds of nitrogen, 50 of phosphoric 

 acid and 100 of potash, or 1000 pounds of a fertilizer, 

 containing 



Nitrogen 4% 



Available phosphoric acid 5% 



Potash 10% 



should insure a very considerable increase in yield on 

 soils of medium fertility, provided the elements are drawn 

 from the best materials. On light soil the fertilization 

 should be still heavier, and the proportion of nitrogen 

 increased. In fact, on soils poor in fertility and possessing 

 good physical qualities, the contributions of plant-food 

 by them may be largely ignored, and the dressings made 

 large enough to supply the entire amount of food required 

 by the crop. On such soils the nitrogen should prefer- 

 ably be applied in fractional dressings and in quickly 

 available forms, because it is essential that this element 

 should be quickly absorbed by the growing plant. The 

 minerals may be all applied in one dressing, though 

 preferably in two, in order that the constituents may be 

 well distributed throughout the surface soil. To better 

 accomplish this, cultivation should follow each application. 



Turnips and swedes. 



In the case of the second class of crops, it has been 

 shown that they are able to extract their phosphoric acid 



