MAM UK. YIELD AND SOLUBLE SALTS IN SOILS. 3 



We shall have, therefore, for comparis n, four naturally 

 strong soils and four others which, in native capacity, are 

 weak. The Janesville and Lancaster soils constitute the 

 stronger group, while the Goldsboro and Marlboro soils form 

 the weaker group. 



APPLICATION OF THE MANURE. 



In order to secure a uniform quality of manure for the two 

 soil types in each locality and for the different amounts ap- 

 plied, the manure to be used was first brought together into a 

 single pile, spreading each load evenly over it until the required 

 amount had been collected. Then, when applying the manure 

 to the field, each load was distributed crosswise of the sub-plots 

 in such a manner that proper aliquot portions fell upon each, 

 sub-plot treated. It happened at Janesville that the manure 

 of the previous winter from a dairy herd could be taken direct 

 from the yard where it had been piled. That used at Lancas- 

 ter was taken from roofed stock yards, but that for Goldsboro 

 and Marlboro had to be collected from various places about the 

 city. Composite samples of the manures had been carefully 

 taken for analyses but these have not been made. 



The acme gtnano* used was purchased in one lot and sub- 

 divided for the four localities, so that this fertilizer was the 

 same for the 8 soil types. The manure and fertilizer were ap- 

 plied broadcast and plowed under on all soils to a depth of 6 

 to 8 inches, about 3 weeks before planting. 



SEED, PLANTING, AXD CARE OF CROP. 



The corn and potatoes used for seed were purchased of' 

 Nbrthrup, King & Company, Minneapolis, Minnesota, Iowa 

 Gold Mine being used for corn and Rural !N"ew Yorkers for 

 potatoes. The planting was in hills 42 inches each way for 

 corn, and 42 inches one way by 21 inches the other for pota- 

 toes. The planting of both corn and potatoes was done on the 

 same dates at all places. Harrowing after planting before the 

 seed was up and flat cultivation for both crops was adopted, 

 using cultivators with 2.5 to 3 inch shovels. 



*Manufacturer's guarantee for this guano was phosphoric acid 8 per cent, 

 ammonia 3 per cent., and potash 2.5 per cent. 



