HOW, WEEN, ABB WITERE TO SOW SEEDS. 77 



1st. Plants, of the same family, should not be planted 

 to succeed each other. 



'2d. Plants, which occupy the ground for a number of 

 years, such as Rhubarb and Asparagus, should be suc- 

 ceeded by annual plants. 



3d. Crops, grown for heads, such as Cauliflower, Cab- 

 bage, etc., should be succeeded by crops grown for their 

 bulbs or roots. 



It is hardly practicable to vary crops according to any 

 set rule, the demand in different localities for certain ar- 

 ticles being greater than in others. Generally variety 

 enough is demanded to allow of sufficient rotation. 

 Our system of heavy manuring, deep culture, and taking 

 two crops from the ground each season, seems to do away 

 in a great measure with the necessity for systematic rota- 

 tion, which would often be found to be very inconvenient. 

 The crops of all others, that we find most benefited by 

 change are, the Cabbage tribe, together with the allied 

 Turnip, Radish, etc., while on the other hand we have 

 grown Onions successively on the same ground for ten 

 years — the last crop just as good as the first; but as a 

 rule of safety, vary whenever you can. 



Quantity of Seeds per Acre. — The quantities given 

 below are somewhat higher in some kinds than the usual 

 estimates, our experience showing us that in weak vege- 

 ating seeds, such as Parsnips, Carrots, etc., it requires 

 numbers, particularly on stiff soils, to force through plants 

 enougli to form a crop ; more seed is required when sown 

 during the dry hot months of summer, than if sown in the 

 cooler and moist seasons of spring and fall, hence quanti- 

 ties are regulated accordingly : — 



