458 



STATE BOARD OF AGRICULTURE. 



Dnscription. 



Dark colored loam soil with clay subsoil occurring in Gratiot 

 and neighboring counties 



Dark colored silt loam underlaid witli open sandy silt. Found 

 in Sanilac and neighboring counties 



Sandy soil underlaid with sand for about 3 feet and then clay, 

 occurring in Midland and other counties in the northern part 

 of the Lake Bed Area 



I'uUildsi 

 per acre 



1264 



785 



765 



A.* 



^^. 



FiS'iu'w 1'^. — Tomatdi'S, nu I In- left no f<r(iliy.<r, nii tlic right acid phosphato. Sandy snil in 

 Wayne County. 



Results Ohtained From the Use of Phosplionis. A safe margin of 

 profit may be derived from the j'udicious use of phosphorus on many of 

 Michigan's sands, loams, clays and mucks. In determining the profits 

 derived from the use of phosphatic or other fertilizers the increase in yield 

 due to their application, the cost of the treatment and the value of the 

 product grown must be considered. Let us suppose for example a 200- 

 pound per acre application of 16% acid phosphate, costing |3.20 on the 

 land, increases the yield of wheat bushels, or oats 25 bushels, and the 

 clover following these croi)s 1200 pounds per acre. The wlieat sold for 

 two dollars per bushel at the farm, the (>;its at seventy cents and the 

 clover hay was worth flS a ton under one set of conditions. At another 

 time the phosphate cost .|2.00 on the land, the wheat brought |1.00 per 

 bushel, the oats forty cents and the clover was worth |7.00 a ton at the 

 farm. Now what are the net profits derived from the investment in the 

 fertilizer? This question is answered in table 5. 



