If fresh stable manure is used, it should be plowed under in the autumn.
I plowed under forty loads of stable litter to the acre before planting.
It is always sown thus when it is to be plowed under, as green manure.
When plowed under, rather than harvested, the result is the same.
Cover-crops were sown on all plats alike and were plowed under in late April or early May of each year.
Crimson clover is usually sown in the late summer after some crop has been reaped and it is plowed under the following spring.
When clover is plowed under it will usually be found more profitable to bury the second growth of the season than the first.
On some soils, as in some parts of Florida, two successive crops of cow peas should be plowed under before sowing alfalfa.
Green-crop manures are crops grown and plowed under for the purpose of improving the fertility of the soil.
Many fields run out in five or six years and the sod is plowed under.