Effects of Population Density, Plant Arrangement, and Fertilizers on Yield of Sweet Corn1

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Abstract
Sweet corn yields increased 35 to 55% as plant population increased from about 4,900 to 21,000 plants per ha under irrigated conditions. Ear wt was 10 to 15% less at the higher populations. Greatest difference in yield usually occurred as row spacing was reduced from 90 to 30 cm. Row spacing affected yield less than population. Some of the highest yields were from 30 × 30 cm spacings in equilateral triangles. Triangular spacing as close as 20 × 20 cm (46,000 plants per ha) produced smaller ears, more culls and lower yields. There were no significant interactions of fertilizer rates and populations on yield; however, minimum fertilizer rates were as high or higher than most commercial applications. Yields of ‘Jubilee’ were more favorably affected by narrow row spacings and higher populations than ‘Golden Cross Bantam’.

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