43

H.—34.

Fig. 2.—Influence of Manorial Treatment on Chemical Composition of a Nelson Pasture (Mown Cuts). Treatment: Untreated.

Note.—The circles on the axis give the mean date of the growth period for which analyses are given. has the best composition during the late summer and autumn. In those cases where a somewhat low supply of phosphate is a probable cause of stock ailment it would appear that the December period—particularly when associated with droughty soil conditions—is likely to give the worst results with stock. At this time the curves for the untreated pasture show the minimum content of phosphoric acid associated with a relatively high percentage of lime. Such a ratio of high lime to low phosphoric acid would tend to aggravate a phosphate deficiency, as it is likely to prevent a full utilization by stock of the phosphate contained in the grass.