Food for 

 Plants 



of soil to which Nitrate is applied measures in a 

 marked degree the profit to be derived from its applica- 

 tion. On the upland, the crop without Nitrate was 

 worth but $19.08 per acre, while the application of 200 

 pounds of Nitrate caused the value to increase to $50.24 

 a gain of $31.16 per acre; deducting the cost of the 

 Nitrate and extra cost of harvesting, we have a net 

 increase in value of $20.50 per acre, or for each dollar 

 invested a net return of nearly $4.00. 



On the lowland, the crop without Nitrate was worth 

 $41.91 per acre, and, with Nitrate, $52.27, a gain of 



The Tedders follow the Mowing Machines for rapid curing of heavy 



crops of hay. 



$10.36, which is reduced to $3.14 when the cost of 

 Nitrate and harvesting is deducted, still a good profit 

 on the investment, though clearly indicating that 

 Nitrogen was not the limiting factor in crop production 

 as was the case on the upland. In making the tables, 

 the actual cost of labor, seed and fertilizers was used. 

 The value of the hay was estimated at $12.00 per ton, 

 and based on weights at time of harvesting. The shrink- 

 age of hay will range from 15 to 25 per cent. ; assuming 

 the shrinkage to be as unusually high as 25 per cent., 



