Interannual variations of rainfall and corn yields in Northeast Brazil

Interannual variations of rainfall in Northeast (NE) Brazil are studied giving emphasis to the unusually heavy rainfall during 1984 and 1985. It is found that a more southward location of the Inter-tropical Convergence Zone is probably responsible for the higher rainfall in 1984 and 1985. In 6 of th...

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Bibliographic Details
Published in:Agricultural and forest meteorology 1997-06, Vol.85 (1), p.63-74
Main Authors: Brahmananda Rao, V., Sá, Leonardo D.A., Franchito, Sergio H., Hada, Kioshi
Format: Article
Language:English
Subjects:
BRASIL
BRAZIL
BRESIL
CROP YIELD
LLUVIA
PLUIE
RAIN
RENDEMENT DES CULTURES
RENDIMIENTO DE CULTIVOS
SEASONAL VARIATION
VARIACION ESTACIONAL
VARIATION SAISONNIERE
ZEA MAYS
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Summary:Interannual variations of rainfall in Northeast (NE) Brazil are studied giving emphasis to the unusually heavy rainfall during 1984 and 1985. It is found that a more southward location of the Inter-tropical Convergence Zone is probably responsible for the higher rainfall in 1984 and 1985. In 6 of the 9 states, rainfall correlates significantly with com yields. In 7 of the 9 states, the Southern Oscillation (SO) index shows a strong positive correlation with annual corn yields. This suggests that the SO index can be used to predict annual corn yields in NE Brazil. The feasibility of predicting annual corn yields in Northeast Brazil from prior observations of the Southern Oscillation index is examined. It is found that good success can be obtained in some states.
ISSN:0168-1923
1873-2240
DOI:10.1016/S0168-1923(96)02390-8