11 



EXPERIMENTS WITH FERTILIZERS, G. W. COMPTON, 



Dlson's Mills, Marengo County. 



Soil, Dark, Sandy' Subsoil, Clay. 



In Mr. Compton's experiments for two years, results are some- 

 what conflicting. His soil is most deficient in phosphoric acid, 

 though the increased yield, when combined with nitrogen, is very 

 marked. Floats, with green cotton seed, give best results for the 

 two years, and give only 16 lbs. less than complete fertilizer in 

 1892. 



o 



o 



7 

 8 



9 



10 



11 



12 

 13 



14 



15 



16 



Pounds of Fertilize 

 PEK Plot. 



Pounds of Fertilizer I-^'^ 



Per Acre. 



6 lbs. Nitrate Soda . . . 

 15 lbs. Acid Phosphate. 



4 lbs. Muriate Potash. . . 



No Manure 



( 6 lbs. Nitrate Soda, 

 I 4 lbs. Muriate Potash.. . 

 ] 6 lbs. Nitrate Soda, 

 (15 lbs. Acid Phosphate. . 

 li lbs. Muriate Potash, 

 (15 lbs. Acid Phosphate . 



No Manure. 



i6 lbs. Nitrate Soda, 

 15 lbs Acid Phosphate, 

 4 lbs. Muriate Potash. . . 



15 lbs. Floats . 



6 lbs. Nitrate Soda, 



15 lbs. Floats 



No Manure 



53 lbs. Green CottonSeed 

 115 lbs Floats, 

 ]53 lbs. Green CottonSeed 

 265 lbs. Stable Manure 

 jl5 lbs. Acid Phosphate, 

 (15 lbs. Cotton Seed Meal 



96 lbs. Nitrate Soda. . . 

 240 lbs. Acid Phosphate. 



64 lbs. Muriate Potash.. 

 No Manure 



96 lbs. Nitrate Soda, 



64 lbs. Muriate Potash.. 



96 lbs. Nitrate Soda, 

 240 lbs. Acid Phosphate. . 



64 lbs. Muriate Potash, 

 240 lbs. Acid Phosphate 

 No Manure 



96 lbs. Nitrate Soda, 



64 lbs. Muriate Potash, 

 240 lbs. Acid Phosphate. 

 240 lbs. Floats 



96 lbs. Nitrate Soda, 



240 lbs. Floats 



No Manure 



848 lbs. Green CottonSeed 

 240 lbs. Floats, 

 S48 lbs. Green CottonSeed 

 4,240 lbs. Stable Manure. 

 240 lbs. Acid Phosphate, 

 240 lbs. Cotton Seed Meal. 



0.5; 

 1—5 ^ 



I.S 

 o!5 



61 



.2 C 



73 O 



V, <- 



o 



—I (U 



o 



2 



13 



22 



22 



8^ 



II 



2 



10 



18 



15 



24 



6 



11 



5 



3 



9 



6 



15 

 13 



lli.< 

 6>i 

 12 



15>^ 

 13K 



12^ 



7 

 5 



3 



3 



4 

 4 



4 

 6 



4 



4>^ 

 5 



4>^ 

 4>^ 



2 



2>^ 

 2 



I'A 



2 



Z% 



2 

 2 



4 



1^ 



17 

 30M 



13K 



9>2 



34>^ 



23)^ 

 14)^ 



43 

 31 



28K 

 15)^ 

 29 



42 



34}-^ 



41 



272 

 488 

 216 

 152 



168 



552 



376 

 232 



688 

 496 



456 

 248 

 464 



672 

 552 



656 



