Food for Plants. 



51 



Crop hi Pounds Per Acre. 



Plot Nos. Table No. I 



1. Nitrate of Soda .... 



and 

 Acid Phosphate 



2. Nitrate alone 



3. Acid Phosphate aU)ne 



4. Cheek — nothing .... 



5. NaNOs and P2O5 



6. NaN03 and P2O5 



Rat(! of 



Application 



per Acre. 



400 



Rate of Crop 

 Crop Yields Yields per 



400 

 400 



200 eacli 

 June 5, 



1919 ; 

 200 each 

 June 24, 



1919.. 



200 each 



June 5, 



1919; 

 400 each 

 June 24, 



1919.. 



per Plot. 



Acre. 



4,180 41,800 



4,100 



2,840 

 2,820' 



41,000 



28,400 

 28,200 



1,780 35,600 



2,040 40,800 



Pounds Per Acre of Protein and Minerals Removed hi/ Crop. 



Phosphoric 



Plot Nos. Table Xu. II Aoid. Potash. Protein. Nitrogen. 



1. Nitrate of Soda ^ 



and U7.23 95.30 689.7 110.3 



Acid Phosphate J 



2. Nitrate alone 38.06 109.06 471.5 75.4 



3. Acid Phosphate alone 56.99 77.25 289.4 46.3 



4. Check -nothing 31.58 62.89 377.3 61.1 



5. NaNOs and P.0= 47.70 75.83 585.2 93.6 



6. NaNOa and P.O5 56.71 102.82 739.7 118.3 



Pounds Per Acre of Minerals Removed by Crop. 



Plot Nos. Table No. Ill Ash. Lime. 



1. Nitrate of Soda "^ ^„ 



and 456.9 31. u 



Acid Phosphate ^ . ns « qq ^4 



2. Nitrate alone ... 468.6 38.54 



3. Acid Phosphate alone 342.2 -8.1^ 



4. Check — nothing 293.0 27. .^5 



5. NaN03 and P.O. 408 .0 45 . 57 



6. NaNOa and P.O. 4/2.1 34.68 



