New statistics reveal sheep and lamb numbers in Australia have fallen a new low.

The Australian Bureau of Statistics report shows the national flock hit 72.7 million last year, the lowest since 1905.

Pig numbers also fell five per cent, to 2.3 million.

Meanwhile, wheat and canola plantings increased significantly last year, up 58 per cent and 52 per cent respectively.

The ABS report says good seasonal conditions in 2008 and 2009 encouraged farmers to increase cropping.