To be sure of a crop, fresh seed must be had, as it cannot be depended on more than one year. For this reason, the largest and straightest roots should be allowed to stand for seed, which, as soon as nearly ripe, should be taken off and spread out to dry, and carefully kept for use. For field culture the hollow-crowned parsnip is the best and most profitable; but on thin, shallow soils the turnip-rooted variety should be used. Parsnips may be harvested like carrots, by ploughing along the rows. Let butter or cheese dairymen give this crop a fair and full trial, and watch its effect on the quality of the milk and butter. The KOHL RABI (_Brassica oleracea_, var. _caulorapa_) is also cultivated to a considerable extent in this country, to feed to stock. It is supposed to be a hybrid between the cabbage and the turnip, and is often called the cabbage-turnip, having the root of the former, with a turnip-like or bulbous stem. The special reason for its more extensive cultivation among us is its wonderful indifference to droughts, in which it seems to flourish best, and to bring forth the most luxuriant crops. It also withstands the frosts remarkably, being a hardy plant. It yields a somewhat richer quality of milk than the ordinary turnip, and the crop is generally admitted to be as abundant and profitable. I have seen very large crops of it produced by the ordinary turnip or cabbage cultivation. As in cabbage culture, it is best to sow the seed in March or April, in a warm and well-enriched seed-bed; from which it is transplanted in May, and set out after the manner of cabbages in garden culture. It bears transplanting better than most other roots. Insects injure it less than the turnip, dry weather favors it, and it keeps well through the winter. For these reasons, it must be regarded as a valuable addition to our list of forage plants adapted to dairy farming. It grows well on stronger soils than the turnip. LINSEED MEAL is the ground cake of flax-seed, after the oil is pressed out. It is very rich in fat-forming principles, and given to milch cows it increases the quality of butter, and keeps them in condition. Four or five pounds a day are sufficient for cows in milk, and this amount will effect a great saving in the cost of other food, and at the same time make a very rich milk. It is extensively manufactured in this country, and largely exported, but is worthy of more general use here. It must not be fed in too large quantities to milch cows, for it would be liable to give too great a tendency to fat, and thus affect the quantity of milk. RAPE-CAKE possesses much the same qualities. It is the residuum after pressing the oil from rape-seed.