FIELD EXPERIMENTS WITH FERTILIZERS. Peis) 
TABLE 17. 
Average yields per acre in Station soil test during eleven years. 




















: = | ee a. alee @. 2 
2 ERTILIZER. Oats (seed). 5 g & cS : = 
3 nae a « 1a Pac. oo 
c ze |dugle gd | ase | gh8) ge | ae 
fo) : oY ve oy & ne 8 ~P Om - a cD) 
7, Kind. Ron ae oe Ot or ae | ane B es 
Pe We SERS | oR | eos 5 
aii qo Ay O n 
Lbs. Bu. Bu. Bu Bu. Lbs. Bu. 
O Nothing, - - -- 2227 HA 7oL A 2827p, OG:O 16102 30ie Ons 
A Nitrate of Soda, - 160 28.7 1,094.0" | 33.6- (9 O14 10960 F16.2 
B Dis. Bone-black, - 320 45.Ori o2/5 1° 39,0014 04.3. 4107 TO qaed or 
CG Muriate of Potash, -160 20.36); 20,8) 30.9.1 108; 1.116808) 64 
00 Nothing, - = — 22.50 2405 ieee 3.0 50.3 O72 on eeen 
Nitrate of Soda, - 160 -f 
D 1 Pie anes piack 2. 320 poate 7 40500) saono, e075)! 12620 Wao.e 
Nitrate of Soda, - 160 |) 
1 Muriate of Potash, 160 BoeAa820 39:7?! 110-2) 13335 ee 
Dis. Bone-black, - 320 Ee 
Muriate of Potash, 160 Blase e ogni ese 54211925 LS 7900 geOg 
( Nitrate of Soda, - 160 
G _Dis. Bone-black, - 320 26,0 | BAe. 2 s0d3-7. 1270.1 | T6210) eo.G 
Muriate of Potash, 160 . 
o0oo| Nothing, - = — 227 Ve 2A Tae 20.5 5521 | 12EOO NN a7 
Stable manure, - | 10,000 } 
s Peete Bec 16G (tar) toss) 42-2 | 430.2 115.795) tes 
‘Yi Stable manure, - | 16,000 43:5 48.4 4 °47.90.165.6) 153875 | 1207 
SUMMARY AND GENERAL DEDUCTIONS. 
The special nitrogen experiments here reported were made with 
corn, cow peas, and soy beans. The purpose of the experiments 
7s twofold: First, to study the effects upon the yields of the crops 
when different kinds and quantities of nitrogenous fertilizers are 
used in addition to uniform quantities of mineral fertilizers; and 
second, to study the effect of the nitrogen in the fertilizers upon 
the percentage and amount of protein tn the crops. 
The experiments with corn indicate that while the mineral fer- 
tilizers were very essential to the corn crop, they were not sufficient 
for this crop or thts soil when used alone. A complete fertilizer 
with nitrogen, phosphoric acid and potash was essential for good 
yields of corn. .When the yields alone are considered, the most 
profitable results financially have been obtained with 25 to 50 
pounds of nitrogen per acre (in nitrate of soda) used tn connection 
with mineral fertilizers. When the feeding value of the crop ts 
considered even larger quantities of nitrogen than 50 pounds per 
~ 
