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El Nino weather pattern may dent NZ farm output: BNZ

El Nino weather pattern may dent NZ agricultural output, BNZ says, citing historic data

By Anna Lu

May 25 (BusinessDesk) - The El Nino weather pattern that meteorological forecasters are predicting this year is likely to reduce New Zealand's agricultural output, based on historic data, economists at Bank of New Zealand say.

Historic data compiled by BNZ suggests a positive co-relation between New Zealand’s agricultural growth and the Southern Oscillation Index, a standardised index of sea level pressure differences between Tahiti and Darwin that is used to determine whether El Nino or La Nina is present.

The index dropped below 15 in May, a level that indicates the coming of El Nino. The Australian Bureau of Meteorology confirmed this month that the Pacific Ocean has officially entered into an El Nino pattern that has a 70 percent chance to last through the southern winter and spring.

El Nino typically increases the likelihood of drought in the east of New Zealand as a result of the strong frequent winds it brings from the west and south west, BNZ said.

Coinciding with that in the past was the rise of livestock slaughter as dry conditions put pressure on the supply of feed. That also tends to restrict milk production growth in general, while not reversing the trend. Previous periods of El Nino have resulted in "modest declines in New Zealand's agriculture GDP."

However, BNZ remains cautious about giving any El Nino-affected price predictions given the amount of variables in the equation. Lamb prices did tend to drop under previous El Nino seasons, but other variables include supply from rival producers in Australia, inventory levels in export markets, and the exchange rate.

El Nino is typically followed by its La Nina opposite, which can also weigh on agricultural production, BNZ said.

(BusinessDesk)

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