177 



Co-operative Fertilizer Experiments. 



This experiment was conducted accoiding to directions 

 by Mr. H. C. Crayton, on his farm about seven miles south of 

 Auburn. 



Twelve plots, each one-eighth acre, were used. The land 

 was gray sandy upland. Red Rust Proof oats were sown 

 February 10, and the fertilizers were harrowed in after the 

 grain was sown. After the date of sowing there was only an 

 insignificant rainfall. The long continued dry weather caused 

 the failure of the oats sown in February. 



On account of the extremely unfavorable conditions, re- 

 sulting in a yield of only about one-half or one-third the usual 

 crop on that soil, the yields given below fail to show the nor- 

 mal effects of fertilizers. 



A fertilizer test reveals the manurial needs of a given soil 

 only when the supply of moisture is sufficient to dissolve the 

 fertilizer and cause a normal growth. The yields are here 

 given for what they are worth. 



Yields of oats i?i co-operative fertilizer test. 



o 



A 

 B 



1 



2 

 .3 

 4 



10 



FERTILIZER 



Amount 

 per acre 



Lbs. 

 436 

 240 

 200 

 240 



KIND 



Cottouseed 



Florida soft phosphate 



Cottonseed meal 



Acid phosphate 



No fertilizer 



Kainit 



Cottonseed meal 



Acid phosphate 



Cottonseed meal 



Kainit 



Acid Phosphate 



Kainit 



No fertilizer... 



Cottonseed meal 



Acid phosphate 



Kainit 



Cottonseed meal 



Acid phosphate 



Kainit , 



YIELD per acre 



Straw 



Lbs. 

 192 

 108 

 200 



200 

 232 

 328 



300 



372 



248 

 232 



712 



472 



Grain 



Bus. 



2.8 

 2 A] 

 3.0 

 3.0 

 3.4 

 5.1 



4.4 



7.3 



4.2 

 3.4 



10.0 



5.6 



