Maize update 93: Making the most of long-term reduced tillage data

This report discusses the effects of maize establishment methods on established plant populations, maize yields, and associated gross margins. It is based on the findings of 38 FAR maize tillage and establishment trials between 2005 and 2020.

Start checking maize crop maturity about three weeks prior to when you think you’ll be starting your silage harvest. Good quality maize silage is best made when whole plant dry matter is between 30-40%

This is the handout from a field day hosted by the Stobie family, Gordonton, Waikato on 4 February 2026.

Welcome to the revised 2025 version of  The drying and storage of grain and herbage seed, first published in 1999. The book comprises six chapters that cover grain characteristics and their reaction to climate, the importance of seed moisture, the drying system, the storage environment, storage pests and their control, and construction considerations. These have been edited and updated by FAR staff and independent experts from the original chapters written by the late Murray Hill.

A velvetleaf find in a paddock that has been ‘clean’ for seven years, is a clear reminder of how long this weed’s seed will remain viable.

This AIMI survey of maize growers provides details of the 2025 New Zealand maize grain and silage harvest, along with sowing intentions for the coming year.

Check out the handout from the field walk at Dan Finlayson's farm and Alan Henderson's farm.

Read the full arable industry code of conduct here. 

Maize is one of the easiest crops to mechanically weed and levels of weed control comparable to herbicides can be achieved. Find out more about the options available and how they work in this maize update.

Weed related yield losses ranging from 15% to 56% for silage and 15% to 61% for grain have been observed in New Zealand maize systems. In this maize update find out management strategies for a number of common annual and perennial weeds of maize.