52 FARM AND SCHOOL PROBLEMS. 



PROBLEMS. 



1. What will be the cost of applying one ton of quicklime @ $6 

 a ton f. o. b. kiln, freight rates $1 per ton, hauling 60c, and cost of apply- 

 ing same $1 per acre? 



2. A ton of hydrated lime is quoted at $5 per ton, freight $1, haul- 

 ing 60c, application $1. What is the cost of liming one acre? 



3. If a ton of ground limestone can be purchased @ $1.50 per ton 

 f. o. b. quarry, freight $1, hauling 75c, application $1, what will be the 

 cost of applying 2 tons per acre on 10 acres? 



4. Which is the cheaper, one ton of burned lime @ $5 a ton f. o. b. 

 factory, or two tons of ground limestone (5} $2.00 a ton; the cost of trans- 

 portation $2 per ton for each, cost of applying each $1 per ton, if 56 pounds 

 of quicklime are equal in value to 100 pounds of ground limestone? 



The United States Dept. of Agriculture has analyzed several 

 limestones and ascertained that some of the injurious limestones 

 were found to contain 38 to 42 per cent magnesium carbonate, 

 while the beneficial limestones contained less than i per cent of 

 this substance. 



An. Experiment and Problem. 



In an experiment field in Johnson Co., Illinois, according to 

 a report of the Illinois Experiment Station, the result was as 

 follows :* 



The effect of ground limestone applied five years before, in- 

 creased the crop yields in 1907 by 12.5 bushels of corn, 6.9 bushels 

 of wheat, and i.n tons of clover hay, per acre. 



The quality of the crops was improved. 



Clover on plots i and 2 without limestone was half weeds. 



Clover on plots 3, 4, 5 with limestone was good and clean. 



PROBLEM. 



At 35c a bushel for corn, 70c for wheat, and $6 a ton for air-dry 

 clover hay, what was the total value of the increase for the three crops, 

 produced by ground limestone? 



Things to Remember About Lime. 



1. Clover has long since ceased to grow in regions where it for- 

 merly grew luxuriously and abundantly. 



2. A limestone soil that was once rich in lime may become deficient 

 in lime. Its former store of lime may be exhausted or leached 

 out. 



3. Lime is nature's remedy for correcting acid soils. 



4. Try out the amount needed by experiments on your own farm. 



Read Bulletin 279, Ohio Experiment Station. 



