for Twenty Years in succession on the same Land. 133 
but cold, wet, and windy ripening and harvest period, tLe result 
was considerably less than the average produce of both corn and 
straw without manure, and with defective manuring ; but fully 
average quantity of corn, and not much less than average quan- 
tity of straw, with the more liberal artificial manuring. The 
farmyard manure, indeed, gave more than its average of both 
corn and straw ; but, as will be seen further on, the produce 
on the farmyard manure plot increased very much during the 
later years of the experiment, so that the result must not be 
attributed exclusively to the season. The weight per bushel of 
dressed corn is seen to vary very considerably under the different 
conditions of manuring. Thus, without manure, and with 
ammonia-salts alone, the weight per bushel was considerably 
below the average under those conditions ; whilst, with the 
more complex and more perfect artificial manures, and with 
the farmyard manure — that is with the more liberal soil-condi- 
tions — it was considerably above the average. 
The smaller deficiency, if any, in total produce, and the higher 
quality, under high manuring, and the greater deficiency, and the 
poorer quality, under the poorer soil-conditions, are consistent 
with the results obtained in the experimental wheat-field, and 
also consistent with the character of great diversity given of the 
spring-sown crops of the country at large. 
The season of 1866, with its late spring, its warm and wet 
early summer, but prevailing cold and wet later growing and. 
ripening periods, gave considerably greater bulk of produce 
than 1865, with its also late spring, but warm and dry growing 
period. Though both seasons were unfavourable, they were 
essentially different in character. Yet they agree in this : that 
each was relatively less unfavourable with high than with poor 
manuring. The more perfect soil-conditions enabled the plant 
the better to withstand the heat and dryness in 1865, and the 
prevailing cold and wet of the growing and ripening period in 
1866. That the quality of both wheat and barley was not worse 
in 1866, notwithstanding the cold and wet ripening period, was 
greatly due to the drying winds which alternated with the rains ; 
but the much higher, indeed, the really high quality of the 
barley grown by liberal manuring, shows how much more vital 
power the plants growing under the more favourable soil-condi- 
tions possessed, and that in a certain degree those conditions 
compensated for the lacking favourable atmospheric conditions. 
Sixteenth Season, 1867. 
Though including some cold intervals, the concluding quarter 
of 1866 was generally warmer than the average, with somewhat 
