Abstract:
The response of sweet corn (Zea mays L. var. rugosa cultivar
Jubilee) to 12 populations and four nitrogen rates was studied in a
field experiment. Populations ranged from 43, 904 to 329,800
plants/ha with nitrogen levels ranging from 0 to 224 Kg/ha. A systematic
spacing design was used. Plant height, weight of leaves, stalk
diameter, and total plant weight were shown to be significantly
affected by plant populations and nitrogen treatments. Total yields
were increased 3.8% as plant population increased from 43,904 to
158,481 plants/ha. Populations above 109,762, reduced marketable
yields. The weight of the first and second ears were significantly
reduced as populations increased from 43,904 to 329,800 plants/ha.
The nitrogen rates of 56,112, and 224 Kg/ha significantly increased
the ear weight over the 0 Kg/ha rate. (There were no significant
population-nitrogen interactions on any of the plant and ear characteristics
measured.)
