296 QUEENSLAND AGRICULTURAL JouRNAL. [1 Apriu, 1899. 
The following results of experiments upon corn, conducted at the Kentucky 
Experiment Station (at Lexington, Kentucky, U.S.), show plainly the effects of 
potash, phosphoric acid, and nitrogen :— 
EXPERIMENTS with FrrtiLisers on Corn at the Kentucky AqricunTuraL EXPERIMENT 
Sration,”* 1889. 
| 
Value of | Profit or 
No. Cost of | Yield of | Yield of | Value of | increasea MOSSAtter 
of Fertilisers applied per Acre. Fertiliser} Ear-Corn| Straw Corn yield of ing cost 
Plot. per Acre.| per Acre.| per Acre.| per Acre.| Corn orks 
per Acre. tilisers: 
i 
| 
: dollars, | USC" | tp. | dollars. | dollars. dollars, 
2&7 | No fertilisers ... ts Py i 34°5 | 2,540 | 12°08 
7 iets | 
160 lb. nitrate of soda i 
320 ,, superphosphate 1 ak iran 79 | 3,920 | 27°65 15°57 + 4°37 
160 ,, sulphate of potash ... an ‘ | 
a 160 ,, sulphate of potash ... te \ 
f \ 
at J 
“60 74 | 3,680 | 25°90 13°82 |+- 6°22) 
320 ,, superphosphate 
160 ,, nitrate of soda 
320 ,, superphosphate 
7 
7°60 34 2,420 11°90 |— 0°18 |\— 7:78 
160 ,, sulphate of potash ... 7 
f “Qh « *) 
6 Ti Ate eaata wal eit ca 20 81 | 3,620 | 28°35 16°27 |+ 9:07 
8 |160 ,, sulphate of potash ... BF 3°60 80 | 4,100 | 28°00 15°92 |+ 12:32 
9 | 320 ,, superphosphate +; <r 4:00 33 2,160 | 11°55 |— 0°53 |— 4:53 
10 | 160 ,, nitrate of soda has we 3°60 41 | 2,420 | 14°35 2°27 \— 1:33 
*Kentucky. Agricultural Experiment Station. Bulletin No. 26, 1890, page 10. 
The use of potassic fertilisers produced the highest yields of ear-corn and 
straw, while the plots fertilised with nitrogen or phosphoric acid only, or with 
a combination of these two ingredients, yielded but little more than the 
untertilised plots, at the same time proving a financial loss. 
Vuring the following years, the yields of ear-corn from the same field were 
in the same proportion, as can readily be seen from the following table* :— 
Yield of Ear-Qorn per Acre in 
é Bushels of 70 1b. 
No, . Average 
of Fertilisers applied per Acre. of Five 
Plot, : = = ear ae Crops, 
1859, 1890, 1891. 1892. 1893. 
| 
5 } 
2 |Nofertiliser ... fe “¢ ef 3845 44 38 38 183 33°9 
160 lb. nitrate of soda ts 
34 | 320 ,, superphosphate 79 72 56 61 35 60°6 
ay a sulphate ie rote mes) , 
',, sulphate of potash ... ce 5 B4° 
4 ip " superphosphate } 74 65 bl 51 30 | 542 
30 ,, nitrate of soda 
wal ae ¥. pepetbhgspuata > } oH 3B a oe) Hs 30:3 
: », Sulphate of potash ... 3 ~ 
64. 160 1 superphosphate byte iT: } 81 76 60 pa 8b 628 
8 | 160 ,, sulphate of potash ... ie 80 67 54 52 30 | 56h 
9 | 320 ,, superphosphate Mer, vn 33 36 88 25 13 29°0 
10 | 160 ,, nitrate of soda =i = 41 35 40 ‘| 27 | 18 32-2" 
| 
* Kentucky. Agricultural Experiment Station. Bulletin No. 55, p. 45. 
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