All New Zealand farmers are taking part in the Agricultural Production Census run by Stats NZ this month.
Livestock farmers, orchardists, wine growers, arable farmers and others running about 60,000 farms receive information packs about the census in July.
"The census information will give farmers and other New Zealanders a complete view of agricultural trends," says agricultural production statistics manager Stuart Pitts.
"The information from the Agricultural Production Census gives New Zealanders a very clear picture of farming, and helps farmers make decisions about where to invest and how they compare with others in the business.
"Long-term trends show the changing dynamics of farming in New Zealand, from 'peak sheep' in the early 1980s to the conversion of many farms to dairying outside the traditional heartland of Waikato, Taranaki, and Southland.