Report of Experiments on the Growth of Wheat. 105 
The obvious conclusion was, that, by the ordinary course of 
cropping to which the land had been subject, the soil had become 
deficient in available nitrogen relatively to the available supply 
of mineral constituents required by the wheat-plant. 
Second Season, 1844-5. 
November, 1844, was comparatively warm, with a good deal 
of rain. December was unusually severe throughout. January 
(1845) was very wet and mild. February and the greater part 
of March were extremely cold, the thermometer on several r occa- 
sions showing lower temperatures than had been observed for 
many years, and at intervals a good deal of snow fell. April was 
cold, but, upon the whole, dry ; and May was cold, wet, and 
unseasonable. In June not much rain fell, and the weather was 
pretty warm throughout ; but July and August were generally 
both cold and wet. September, too, was cold throughout, with 
an excess of rain during the latter half of the month. In June, 
the dew-point was considerably above, in July about, and in 
August and September somewhat below the average ; but, in 
each of these months, the degree of humidity of the air was 
notably above the average. 
The wheat-crop of 1845 was generally deficient in bulk, yield, 
and quality. It was in this season that the potato disease first 
appeared to any extent. 
The following is a summary of the results obtained in the ex- 
perimental field : — 
Table II.— Summary of the Results of the Second Season, 1844-5. 
Manures. 
(Quantities per Acre.) 
Unmanured (Plot 3) 
14 tons Farmyard Manure (Plot 2) 
2 cwts. Carbonate of Ammonia (top-dressed in 
solution), Plot 5* 
3 cwts. Ammonia-salts (equal parts Sulphate I 
and Muriate) ; mean of 2 plots (9 and 10) .. f 
2 cwts. Ammonia-salts (equal parts Sulphate) 
and Muriate) and Superphosphate of Lime} 
(plot 18) 
2 cwts. Sulphate of Ammonia, 5 cwts. Kape- 
cake, and Mineral Manure ; mean of 3 experi- 
ments (plots 1, 11, and 12) 
Produce per Acre, &c. 
Dressed Corn. 
Quantity. 
Weight 
per 
Bushel. 
Total 
Corn. 
Straw 
and 
Chaff. 
Bush. Pks. 
lbs. 
lbs. 
lbs. 
23 Of 
56-5 
1441 
2712 
32 0 
56-8 
1967 
3915 
2G 3f 
57'3 
1732 
3599 
32 2£ 
57*3 
205G 
4162 
33 01 
56-5 
2048 
3819 
28 2| 
55-3 
1804 
3979 
Owing to the very unfavourable winter of 1844-5, severe frost 
