New York Agricultural Experiment Station. 277 



Table VIII. — Dry Substance Produced in Plant-food Requirement Experi- 

 ments: P 2 O s in Varying Amounts in 1900-1, K 2 in Varying Amounts in 1901-2, 

 Other Elements in Full Supply. 



turnips. 



Table IX. — Summary of Relation Between Dry Substance Produced and 

 P2O5 Utilized in Plant-food Requirement Experiments. 



barley, peas, tobacco, tomatoes. 



1900-01. 



Change in P 2 05 applied 



Change in dry matter in crop . . 



Change in P 2 Os used 



Change in relation P 2 Os to dry 

 matter 



1901-02. 



Change in P 2 Os applied 



Change in dry matter in crop . . 



Change in P 2 Os used 



Change in relation P 2 C>6 to dry 

 matter 



1903-04. 



Change in P 2 Os applied 



Change in dry matter in crop . . 



Change in P 2 Os used 



Change in relation P 2 06 to dry 

 matter 



Barley. 



250 to 1 , 500 



40 to 44 . 1 



56.1 to 101.9 



1.4 to 2.3 



4.50 to 1,500 



142.6 to 178 



268 to 632 



1.88 to 3.55 



500 to 1,000 



134 to 147.2 



264.4 to 394.8 



1.97 to 2.7 



Peas. 



300 to 1 , 500 



45.4 to 57.8 



171.5 to 477.5 



3.7 to 8.3 



200 to 1,000 

 56.1 to 70.3 

 140 to 555.2 



2.5 to 7.9 



Tobacco. 



400 to 1,500 

 19.3 to 20.7 

 38.5 to 63.2 



2 to 3 



300 to 1 , 500 



68 . 1 to 66 . 6 



200 to 437 



2.9 to 6.6 



300 to 1,000 



44 to 46.5 



171.2 to 392.9 



3.9 to 8.4 



Tomatoes. 



300 to 1 , 500 



65.4 to 66.8 



219.5 to 746.5 



3.3 to 11.2 



400 to 1 , 000 



50.8 to 54.1 



259.4 to 530.3 



5.1 to 9.8 



