76 



BULLETIlSr 699, U. S. DEPARTMENT OF AGRICULTUEE. 



Lime was also applied at the rate of 2,000 pounds per acre every 

 foiir years. The first fertilizer applications were made in 1908, but 

 in 1907 a crop of cowpeas was grown on the entire tract in order to 

 compare the drained and undrained areas. 



The results of five years' work with the fertilizer treatments men- 

 tioned above are given in Table XLIII. 



Table XLIII. — Yields of corn, oats, wheat, and cowpeas obtained on tiled and 

 untiled land at Vandalia, Mo. (1908-1912) . 





Appli- 

 cation 

 per 

 acre. 



Yield of various crops per acre. 



Fertilizer. 



Corn (1908). 



Oats (1909). 



Wheat (1910). 





Drained. 



Un- 

 drained. 



Drained. 



Un- 

 drained. 



Drained. 



Un- 

 drained. 



Manure 



Tofis. 

 18 



Pounds. 

 1 600 



yPushels. 

 1 33.7 



1 34.4 



31.6 



} 33.9 



i 37.1 

 32.4 



i 38.2 



Bushels. 

 31.6 



26.5 

 26.3 

 31.8 



28.6 

 25.5 



31.0 



Bushels. 

 63.0 



58.5 

 56.9 

 52.6 



52.9 

 47.9 



56.2 



Bushels. 



54.8 



57.4 

 52.2 

 45.5 



47.6 

 38.8 



51.1 



Bushels. 

 16.4 



12.4 

 9.0 

 12.4 



11.9 



8.5 



10.2 





Rock phosphate 



Bushels. 

 11.9 



Legume 





Manure 



8 





Legume 





Do 





5.1 



Do .'. 







B one meal 



2 150 





Legume 





Bone meal 



2 150 

 2 50 



7.3 



Potassium chloride 





No fertilizer 



4.5 



Legume 







Bone meal 



2 150 



2 50 



2,000 





Potassium chloride 





Lime 











Applica- 

 tion per 

 acre. 



Yield of various crops per acre. 



Fertilizer. 



Cowpeahay (1911). 



Corn a912). 





Drained. 



Undrained. 



Drained. 



Undrained. 



Maniirfi . 



Tons. 

 18 



Pounds. 

 '600 



• 



Pounds. 

 1,372 



1,227 



2,018 

 1,772 



1,603 

 1,492 



1,949 



Pounds. 

 1,467 



1,199 

 1,171 

 1,691 



1,548 

 1,152 



1,315 



Bushels. 

 47.8 



44.9 



40.6 

 43.6 



44.5 

 42.9 



47.2 







Bushels. 

 43.6 



Legume 





> 







8 





Legume 





41.0 



Do 





33.2 



Do 





} 

 I 





Bone meal 



2 150 



41.7 



Legume 





Bone meal 



2 150 



40.8 



Potassium f<hloririp, 



2 50 



) 



1 





No fertilizer 



40.8 



Legume 







Bone meal 



2 150 







Pnti^-wiiim nhlnrirlp. , , . , , 



250 [ 

 2,000 1 





Lime . , 















' Once every four years. 



2 Applied before corn and again before wheat. 



