VARIATION OF RICE YIELD WITH TEMPERATURE AND RAINFALL AT OGOJA, NIGERIA

Abstract

The aim of this study is to determine the variations in rice yield as caused by agrometeorological variables in Ogoja. Data on agrometeorological variables for a period of eleven years (1991) – 2001) was collected from the weather station, Ogoja. The yield of rice based on the varieties ITA 306, ITA 212, BG 90 – 92 and IR 1416 was collected from the Cross River Basin and Rural Development Authority and Agricultural Development Project, Ogoja.


Using the multiple correlation analysis to determine the nature of the relationship between the two variables, the result indicated that:


a. Pre-sowing rainfall, temperature during the nursery phase, rainfall during the grainfilling and ripening phases have positive correclation.


b. Rainfall during the nursery phase, temperatures during the grainfilling and ripening phases have negative correlations.


Also, it was discovered in this study that rice yield was not highly variable during the period under study.


KEY WORDS: Agrometeorology, Variables, Variations, Yield, Influence.


Global Journal of Agricultural Sciences Vol.2(2) 2003: 98-101