11 



greatly diminished by weathering when they are left on the surface 



of the field during the winter. Hence, to secure the full value, the 



cowpeas should be fed and the stable manure returned to the field. 



If the vines are plowed under in autumn, a winter forage crop, such 



as winter oats, crimson clover, rye, or vetches, should be planted to 



prevent the leaching and washing action of the winter rains. 



Jaked G. Smith, 



Assistant Agrostologist. 

 Approved : 



James Wilson, 



Secretary. 



Washington, D. C, March 25, 1898. 



O 



