The concentration and total content of P, K, Ca, Mg, N, Fe, Mn, and B in storage roots and in vines of sweet potatoes [Ipomoea batatas (L.) Lam.] was followed for a 14 week period beginning 2 months after planting. The concentration of N, P, K, Mn, and Mg in the vines and N, P, and K in the roots decreased slightly during the period. Other elements showed no definite seasonal trends. Total uptake by the vines showed little change after the second sampling period
Received for publication December 6, 1973. Scientific Article No. A1889, Contribution No. 4805, Maryland Agricultural Experiment Station, (Department of Horticulture).