1902.] 



PUBLIC DOCUMENT — No. 33. 



35 



A. — Soil Test with Grass. (^SoufJi Acre.) 

 This acre has been used iu soil tests for thirteen years, 

 beginning in 1889. The crops in successive years have 

 been as follows : corn, corn, oats, grass and clover, grass 

 and clover, corn, followed by mustard as a catch-crop, rye, 

 soy beans, white mustard, corn, corn, and grass and clover 

 in 1900. The field has not been ploughed this year but 

 received fertilizers as usual. During the entire thirteen 

 years four of the fourteen plots have received neither 

 manure nor fertilizer ; three plots have received yearly a 

 single important manurial element, viz., one of them nitro- 

 gen, another phosphoric acid and another potash, — every 

 year the same ; three have received each year tAvo of these 

 elements ; one has received all three 3'carly ; and one each 

 has yearly lime, plaster or manure. ]Much of the field, 

 having been either entirely unmanured or supplied with 

 only a portion of the elements ordinarily considered as 

 essential, is now much exhausted. The four nothing plots 

 this year produced an average yrnXdi of 375 pounds of hay 

 to the acre at the first cut and 313 pounds at the second cut. 

 The table shows the rate of yield of the several plots : — 



Hay and Rowen. — South Acre Soil Test, 1901. 



FERTrLIZERS USED. 



Nitrate of soda, .... 



Dissolved bone-black, 



Nothing, 



Muriate of potash, 



Lime 



Nothing, 



Manure 



Nitrate of soda and dissolved bone 

 black. 



Nothing 



Nitrate of soda and muriate of potash, 



Dissolved bone-black and muriate of 

 potash. 



Nothing, 



Plaster 



Nitrate of soda, dissolved hone- 

 black and muriate of potash. 



Gain or Loss per Acre, 



compared with nothing 



Plots (Pounds). 



Hay. 



+500 

 —100 



+233.33 

 +166.67 



+3,300 

 +800 



+1,700 

 +1,500 



—200 

 +2,900 



Rowen. 



+310 

 +130 



+450 

 +100 



+2,340 

 +170 



+533.50 

 +1,126.67 



—180 

 +720 



