GENERAL REMARKS. 
21 
in wheat : after being heated in a kettle until it becomes 
thin, it may be stirred in among the grain until it becomes 
saturated. The wheat should afterward be mixed with a 
sufficient quantity of wood ashes to dry and render it fit for 
sowing. 
To prevent depredations from crows, steep corn in strong 
saltpetre orine, sow it over the land, or steep your seed corn; 
and if the crows once get a taste, they will forsake the field. 
Perhaps the next important point to be attended to is the 
most proper rotation of crops. Virgil, who was a philoso- 
pher as well as a poet, very justly observes, that “ the true 
REPOSE OF THE EARTH IS A CHANGE OF ITS PRODUCTIONS.” 
It is a curious fact, that a plant may be killed by the 
poison which it has itself secreted, as a viper may be de- 
stroyed by its own venom. Hence it has been very gene- 
rally noticed, that the soil in which some particular vege- 
tables have grown, and into which they have discharged the 
excretions of their roots, is rendered noxious to the prosperity 
of plants of the same or allied species, though it be well 
adapted to the growth and support of other distinct species 
of vegetables. 
It is proved by experience, that fall Spinach is an excellent 
preparative for Beets, Carrots, Radishes, Salsify, and all other 
tap, as well as tuberous rooted vegetables. 
Celery or Potatoes constitute a suitable preparative foi 
Cabbage, Cauliflower, and all other plants of the Brassica 
tribe ; as also Artichokes, Asparagus, Lettuce, and Onions, 
provided such ground be well situated, which is a circum- 
stance always to be duly considered in laying out a garden. 
Lands* that have long lain in pasture are, for the first three 
or four years after being tilled, superior for Cabbage, Tui- 
nips Potatoes, &c., and afterward for culinary vegetables in 
general. 
The following rules are subjoined for farther government : 
Fibrous rooted plants may be alternated with tap ca 
tubeious rooted, ana vice versa. 
