The study aimed to determine the productivity of IPB Var 6 across different growing locations and identify the climatic factors affecting corn yield in the three climatic types based on Corona’s classification. Field experiments were conducted for one cropping season in selected corn-growing areas in Luzon, Visayas and Mindanao. These were laid out in a randomized complete block design (RCBD) with two replicates for each location. Climatic parameters such as temperature, rainfall, and relative humidity were determined in each location. Across locations, IPB Var 6 had the highest grain yield in Palayan, Nueva Ecija with a Type I climate; Tagbina, Surigao del Sur with a Type II climate; and Pitogo, Quezon with a Type IV climate. Temperature affected the grain yield of IPB Var 6 across climatic types in Luzon, Visayas, and Mindanao under a Type I climate. At the same time, location (environment) was also a factor under Type II and Type IV climates. The findings are useful in planning strategies like the dissemination of climatic information and the adjustment of cropping calendars in specific planting locations.
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