Repository: UIHistories Project: Board of Trustees Minutes - 1880 [PAGE 54]

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52 The land had never been manured and had never been in grass. It had been in corn most of the time for 25 or 30 years.

Plats.

1 1 1 1 1 1 1 1 1 1 1 1 1 Conditions. sh Cost p e r B up e re l s acre. acre. $15 00 26 37 15 00 4150 63 78 32 19 3 00 20 82 22 50 4157 45.57 7 52 28 34 83 12 80.62 76 56 75 62 75 62 68.75 67 50 65 62 65 32 64 06 63 12 62 60 62 50 71.87 b u . 54.37 '* 62.60 79.84 " 70.32 "

20 loads b a r n m a n u r e 30 " " " 275 lt)s. n i t r a t e s o d a 20 l o a d s b a r n m a n u r e 200 lt>s. Sulph. a m m o n i a 200 " N i t r a t e " 595 " P b t a s h (40 p e r cent.) 200 '* Sulph. a m m o n i a 200 " Muriate " 595 " P o t a s h 275 " N i t r a t e s o d a 200 ' ' G y p s u m 595 " P o t a s h 500 ' ' N i t r a t e s o d a 595 " P o t a s h 100 " Sulph. a m m o n i a 100 " N i t r a t e " 595 " P o t a s h 550 " Nitrate s o d a 350 " S u p e r p h o s . lime Nothing 595 " P o t a s h 300 ' ' S u p e r p h o s . lime

$15 00 1137 11 50 30 00 20 80 1150 3146 20 82 11 37

. ..

20 82 5 75 15 00 20 82 24 75 '. 20 82 7 52 ,

H i g h e s t p l a t w i t h o u t fertilizer Lowest " " " A v e r a g e of p l a t s w i t h o u t fertilizer " with b a r n yard m a n u r e «' all p l a t s

In 1877, these plats were again planted with corn, as before, to test effect of the commercial fertilizers on second crop. On three of the seven plats unmanured the year before, fertilizers were applied, as noted in accompanying table, which gives the yields for each year. The season was unfavorable, and each plat yielded less than in 1876; the per cent, of decrease varying from 1 to 42, the average being 28.4. The average decrease on the four plats on which no manure was put in either year was over 31 per cent. The greatest decrease, 42.4 per cent., was on the plat on which salt was applied at the rate of 500 pounds per acre; applied broadcast on surface when <$orn was well up.

EXPERIMENTS IN CORN FERTILIZATION.

F e r t i l i z e r , 1876.

F e r t i l i z e r , 1877.

Yield, '76. Yield, '77.

2 *i

P o t a s h 119 lbs., s u p e r p h o s p h a t e lime 70. N o t h i n g Nothing — Salt 100 l b s . P o t a s h 149 lbs., sulph. a m m o . 20, m u r i a t e Nothing a m m o . 20 B.Y.manure, 4 l'ds Nothing p l o w e d under. 1 Nothing ^Nothing G y p s u m 40 lbs Nothing P o t a s h 119 P o t a s h 119, n i t r a t e s o d a 55.

1,000 lbs. 895 " 1,045 990 1,130 900 1,070 1,080 1,075 " " " •" *« " "

695 lbs. 515 " 725 " 770 " 1 825 " 570 " 680 " 795 " 885 " 1

30.5 42.4 31.2 21.2 27.0 36.7 33.5 26.4 18.1