In the mean time, however, setting out from the day, whatever it may happen to be, on which the west winds begin to prevail (for it is not always on the seventh before the ides of February[471] that they do begin), whether, in fact, they begin to blow before the usual time, as is the case with an early spring, or whether after, which generally happens when the winter is prolonged—there are subjects innumerable to engage the attention of the agriculturist, and those, of course, should be the first attended to, which will admit of no delay. Three month wheat must now be sown, the vine pruned in the way we have already[472] described, the olive carefully attended to, fruit-trees put in and grafted, vineyards cleaned and hoed, seedlings laid out, and replaced in the nursery by others, the reed, the willow, and the broom planted and lopped, and the elm, the poplar, and the plane planted in manner already mentioned. At this period, also, the crops of corn ought to be weeded,[473] and the winter kinds, spelt more particularly, well hoed. In doing this, there is a certain rule to be observed, the proper moment being when four blades have made their appearance, and with the bean this should never be done until three leaves have appeared above ground; even then, however, it is a better plan to clean them only with a slight hoeing, in preference to digging up the ground—but in no case should they ever be touched the first fifteen days of their blossom. Barley must never be hoed except when it is quite dry: take care, too, to have all the pruning done by the vernal equinox. Four men will be sufficient for pruning a jugerum of vineyard, and each hand will be able to train fifteen vines to their trees.[474] At this period, too, attention should be paid to the gardens and rose-beds, subjects which will be separately treated of in succeeding Books; due care should be given to ornamental gardening as well. It is now, too, the very best time for making ditches. The ground should now be opened for future purposes, as we find recommended by Virgil[475] in particular, in order that the sun may thoroughly warm the clods. It is a piece of even more sound advice, which recommends us to plough no lands in the middle of spring but those of middling quality; for if this is done with a rich soil, weeds will be sure to spring up in the furrows immediately; and if, on the other hand, it is a thin, meagre land, as soon as the heat comes on, it will be dried up, and so lose all the moisture which should be reserved to nourish the seed when sown. It is a much better plan, beyond a doubt, to plough such soils as these in autumn.