75 



Increase of seed cotton per acre when acid phosphate was added: 



To unfertilized plot — 104 245 



To cotton seed meal plot 10 260 



To kainit plot 93 195 



To cotton seed meal and kainit plot — 12 325 



Average increase with acid phosphate — 3 256 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 105 150 



To cotton seed meal plot 244 160 



To acid phosphate plot 302 100 



To cotton seed meal and acid phosphate plot 222 225 



Average increase with kainit 218 159 



Experiments at Betts, Conecuh County. 





FERTILIZER 



Betts 



1905 



o 



rt 



u 



a 

 □ 



3 



o 



E 

 < 



KIND 





Oni 



2S|^ 



SI 



(U N 



Bp:tts 

 1906 



I 



1) 



O ^ 



O 1. 



u a 



I— ( 3 



Betts 



1907 



2§ 



dj ■<-' 



o <u 



N 

 (U .- 



o **^ 



3 C 

 i-i 3 



1 



2 

 3 

 4 



10 



Lbs. 



200 

 240 



200 

 200 

 240 

 200 

 200 

 240 

 200 



'266 

 240 

 200 

 200 

 240 

 100 



Cotton seed meal . . 

 Acid phosphate . . . 



No fertilizer 



Kainit 



Cotton seed meal . ) 

 Acid phosphate .. ( 

 Cotton seed meal . / 



Kainit \ 



Acid phosphate . 



Kainit 



No fertilizer 



Cotton seed meal . j 

 Acid phospha'e .. ,• 



Kainit 1 



Cotton seed meal . ) 

 Acid phosphate . . ,- 

 Kainit ) 



Lbs. 



784 

 792 

 568 

 704 



864 



832 



824 

 552 



896 



880 



Lbs. 



216 



224 



139 

 302 



273 



269 



344 



328 



Lbs 



"56 



^40 



■■■9' 



74' 



76 



62 



88 



80 



