Fertilizers Applied to Timothy on Corn Crop. 



185 



to the resultant effect of the fertihzers previously applied to the timothy 

 of T^yS^-/ pounds or 35.8':/ of forage, 558.4 pounds or 25.15;^ of stover, 

 and 20.7 bushels or 66.65'j: of ear corn. This, however, is no proof 

 that it is better practice to allow the grain crop in a rotation to take the 

 residual effect of the fertilizers, as the small increase due to the fertilizers, 

 where they were applied directly to the corn, was unquestionably caused 

 by the already productive state of the soil. However, that fertilizers 

 do have a valuable residual effect, even for the grain crops, and that 

 their full value cannot be appreciated until their eft'ect upon all crops 

 in a rotation is determined, is shown plainly by the data presented for 

 plats 711-732. 



The fact that the ear corn has been increased more than twice as 

 much as the stover, would seem to indicate that the mineral fertilizers, 

 especially phosphorus, have had the most marked residual effect. This, 

 however, is not the case, especially in regard to the phosphorus, as the 

 following table will show that the plats which received nitrogenous 

 fertilizers have produced an increase of equally as much or more than 

 those receiving phosphorus, though not so much as those receiving 

 potash. As the residual effect of sodium nitrate cannot be large owing 

 lo its easy removal by drainage water, the effect produced by the 

 nitrogenous fertilizers would indicate that the greater growth of 

 timothy on the nitrogen treated plats was largely responsible for the 

 increased yield of corn. 



TABLE IV. 



Showing Percentage Increase in Forage, Ear Corn and Stover on Plats Fertil- 

 ized FOR Timothy, but Not for Corn. 



Treatment. 



Nitrogen 



Phosphorus 



Potassium 



Nitrogen, phosphorus 



Nitrogen, potassium 



Phosphorus, potassium 



Nitrogen, phosphorus, potassium. 

 Nitrogen, phosphorus^, potassium. 

 Nitrogen^, phosphorus2, potassium 

 Nitrogen2, phosphorus, potassium. 

 Nitrogen4, phosphorus, potassium. 



PERCENTAGE INCREASE. 



Green 

 Forage. 



12. 16 

 8.63 

 30.02 

 13-76 

 16.84 



31 07 

 36.00 



42.96 

 44 •30 

 46.95 

 43-49 



Field Cured. 



Ear corn. Stover 



18 

 12 

 64 



27 

 40 



31 

 73 

 87 

 87 

 91 

 82 



34 

 23 

 08 



91 

 52 

 09 

 22 

 90 



41 

 49 

 1 1 



^i .07 

 8.96 



13-33 

 10.05 

 —1.08 

 23.04 

 30.01 

 40.44 



33-22 



30-65 

 25.90 



