


45 
Brie ieey D0. lbs./each nit_.codasandisulphsiam)) .. 4 4.3. 6 ccaaen aces 65.1 
*E. 12. vf =e s 5 AE AER ROR PRE .. 65.6 
*E 13. 400 Ibs. acid phos., 100 lbs. nit. soda pera ........ .. 64.3 
F. 13. 400 lbs. acid phos., 200 lbs. nit. soda per a., nit. applied 
when plants | ft. tall (1000 lbs. phos. 1884, no fert. 
SE LOC) (eee ee Felt CL SAM a: Stee ee eee 74.8 
F. 15. As F. 18, but nit. applied when plants in bloom (potash 
PSGd yo Terk 18831885 eisai als boss Aad » Webs emt 61.9 
*H. 14. 400 Ibs. acid phos., 100 lbs. sulph. am. pera........... 63.6 
*E. 19. 400 Ibs, acid phos., 200 lbs. each nit. soda and sulph. am. 
DROP RURRAD chek er ct AMA 2) oo! a a EMM 5 nJes aac 6 SALEER of Oh raed oad 54.2 
If we examine these figures closely, we find we cannot 
demonstrate any especial effect of the phosphate, and find 
that increased phosphate was followed by decrease of crop; 
that increase of nitrate of soda was detrimental, while in- 
crease of sulphate of ammonia was slightly beneficial, and 
that in general there is no relation between the crop and 
the amount of fertilizer used. The effect of previous fer- 
tilization seems to appear in F.. 19 and 21, but can we be 
sure that the deficiency of crop arises from this cause? The 
following is the average of our figures, massing all minor 
differences of treatment : 
Merch. Corn: 
yield per acre, 
Oe eR eads SVESILE Cs 6 cae Si Piel Be as wc pa hd iho Bia dhe, Sow lMaey 57.6 bushels. 
ge Ss Us MRE a cE AP PAO CHAE RRR A eee a 51.3 fe 
EE Te AG SPSIIRE LAYETTE CRN CORRS REY 2 en 56.9 we 
TEE TOTTORI WEA en on Poteet Wik Coc near sate eee: 61.9 4 
Nitrate of soda and sulphate of ammonia ... .............. 65.3 sf 
Rare timaterminmitrasciorsoasd. <1) PTOI Sil ONS So. 67.0 ef 
Phosphate, and sulphate of ammonia ...........5....2.055 63.6 <, 
Phosphate, nitrate of soda and sulphate of ammonia......... 54,2 oe 
These figures do not certainly indicate decisive results. 
Yet we note with surprise that EK. 6 and i7 show close 
duplication, as also do EK. 11 and E. 12. If we arrange the 
results gained from the starred series alone, or the plats 
under duplicate fertilization heretofore, we have: 
Yield per acre. 
TUE ESO) EGS UT SRN OE Aa ae ee ra Neth tema ta es 56.5 bushels, 
Benny HHOSPHaLe DEN Aes). 3's hs hk gna ws dye she weleiec el 4 da iG) 8 or 
Beer ierate AOUaT per ec iL ee a hee. 63.9 f 
100 lbs nitrate soda and sulphate of ammonia mixed ........ 65.3 cr 
400 lbs. acid phosphate and 100 lbs. nitrate of soda........ 64.2 0 
400 lbs. acid phosphate and 100 lbs. sulphate of ammonia.... 63.6 ry 
or an indication that on our soil phosphoric acid is in_ suffi- 
- cient supply, and that nitrogen is the paramount constituent 
needed After determining this we may wisely ask what 
possible value does this conclusion possess for the farm next 
door, or to the farm in the next town, county or state. 
