Seasonal plantings of two sweet corn varieties and two hybrids were established at the Isabela Agricultural Experiment Substation during 1972- 74. In 1972-73, hybrid Hawaii 68 produced the highest marketable yield of 49,289 ears/ha when planted on Dec. 21 (winter planting) and 45,245 when planted on Sept. 21 (autumn planting). The highest marketable yield of the Hawaiian Hybrid when planted on Sept. 21 was 33,570 ears/ha, whereas, PR 50 yielded 36,489 and 31,885 marketable ears when planted on Sept. 21 and Dec. 21, 1972-73, respectively. USDA 34 produced its highest marketable yields in the Sept. 21 plantings, with 31,774 in 1972-73 and 23,129 in 1973-74.
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