Expei iments with different Top-dressings upon Wheat. o9.'> 
the preceding plot, and it was plain to any one that the marl had 
had no effect whatever. On analysis this chalk-marl was found 
to have the following composition : — 
Composition of Chalk Marl. 
:\r)isture 2-49 
Carbonate of lime Cy-23 
Oxides of irou and ahiniina "Sfj 
rjiosphate of lime (bonc-eartli) "63 
Sulphate of Ume trace 
Magnesia and alkaUes , '45 
Soluble silica 8-29 
Insoluble siliceous matter (fine sand) .. .. 18"55 
100-00 
Towards the end of July the crop was nearly ripe ; at that 
time I could not notice any marked difference in the state of 
ripeness of the crops on the 7 experimental | -acres. 
The wheat was reaped in the first week of August, and 
threshed out on the 24th of August, 1859, and the whole of the 
])roduce of corn and straw carefully weighed: it was omitted, 
however, to weigh the chaff and cavings. 
The following Table exhibits the yield of corn of each experi- 
mental plot, and the produce calculated per acre : — 
'J'able showing the Produce, in lbs. and bushels, of Corn of Experimental 
Plots of \-acre, and Weight and. Bushels per acre. (^Average weight 
jMir bushel, 60 lbs.) 
I*roduce in com 
per plot. 
Produce in com 
per acre. 
Plot 
1. 
11. 
III. 
IV. 
V. 
VI. 
VII. 
1^ cwt. of nitrate of soda per acre 
f 180 lbs. (if nitrate of soda and 1^ cwt, of 1 
4 cwt. of Proctor's wheat-manure per acre 
lbs. 
6Q1^ 
570 
609 
595 
663 
405 
404i 
bushels. 
10 
9^ 
10 
10 
11 
6f 
6i 
lbs. 
2406 
2280 
2436 
2370 
26.52 
1620 
1618 
bushcK 
38 
m, 
441 
27 
27 
By direct weighings it was found that the weight per bushel 
was in — 
GOilbs. I No. V (iOlbs. 
60 „ I „ VJ 60 „ 
«0| ,, I „VII 60J„ 
60i „ I 
Practically speaking, there was thus no difference in the weight 
of corn per bushel. Not having had much experience in filling 
bushels of corn, I found that I could not always fill the bushel- 
Xo. I. 
» n. 
„ IV. 
