5. All the plants in this section are known to give a garlic-like flavour to the dairy produce of the fields in which they grow. The two first especially render butter unfit for market; so that if abundant they would take off a large portion of the value of the field. They occur mostly in patches, and should be pulled out as soon as strong enough: if this be done year by year, it will be found to diminish in an increased ratio; and two or three seasons will be enough to rid the field of so great a pest, and would be well worth doing if it cost much—which it ought not to do—as these weeds usually occur in otherwise tolerably good meadows. The jack-by-the-hedge is usually confined to the vicinity of the fences, and may be removed by the hand or spud. It is a prolific seeder; so that on no account should it ever be allowed to ripen its seed. 6. Rough grasses and grass-like weeds are far too common in poor, wild, and neglected pastures. In their action they come closely to those of our second section; they are indications of a want of drainage, which operation well performed soon causes the death of this group, which end is greatly facilitated by manuring and depasturing as the drains begin to act. In concluding this description, it may be well to remark that many more plants might have been included in the different sections; but enough has been done to show that a pasture, to be good, must not consist of any plants which chance, accident, or more commonly neglect, may throw together. In arable culture one-half the expense is, in one way or other, connected with weeding, and we are of opinion, that if only one shilling per acre was spent on the weeding of pasture, it would yield 300 per cent. profit on the outlay. CHAPTER XIII. ON THE IRRIGATED MEADOW. Irrigation, as a means of increasing the amount of pasturage, is so important a process that it may be well to describe it in this place. For a perfect irrigated meadow, we should have full command of water whenever it may be required. This water should be capable of flowing through, not of pouring over, and standing on the land,—this latter being flooding. The drainage should be so perfect that the land will be sound enough for us to walk over in the dry in a few hours after the water has been turned off.