Weak growth may stoke speculation the Reserve Bank will cut the official cash rate again in coming months after last week's quarter-point reduction to 3.25 per cent.
Reserve Bank governor Graeme Wheeler cited the slump in global dairy prices and the impact on the terms of trade in last week's monetary policy statement, estimating farmers' incomes in the 2014/15 season would be down about $7 billion.
Agricultural industries contracted 2.3 per cent in the quarter, reflecting lower milk production that was driven by drought conditions in some regions and lower dairy prices.
In this week's GlobalDairyTrade auction, dairy prices fell to their lowest levels in almost six years.
The mining sector shrank 7.8 per cent, "due to decreased exploration activity, and oil and gas extraction," the government statistician said.
"There was less extraction and exploration as international prices fell."
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The combined 2.9 per cent decline in primary industries more than offset gains in business services, up 2.1 per cent, retail trade and accommodation, which rose 2.4 per cent on the back of tourist spending, and a 2.5 per cent increase for transport, postal and warehousing, led by international air transport.
Retailing and accommodation recorded annual growth of 6.1 per cent, the fastest in almost a decade, helped in the quarter by international events such as the Cricket World Cup and Chinese New Year.
International tourist spending rose 2.3 per cent in the latest quarter.
The expenditure measure of GDP grew just 0.1 per cent in the first quarter, slowing from a revised 1.2 per cent increase three months earlier. Household consumption rose 0.7 per cent, led by spending on durable goods, and exports of goods and services gained 1.5 per cent. Imports of goods and services rose 1 per cent.
Inventories grew by $106 million, reflecting a build-up in agriculture and forestry. Investment in fixed assets fell 1.9 per cent.
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