This is the second edition of the MPT book to include results from multiple sites and multiple years. This means that some hybrid results are given as averages from four different season, and from up to eleven separate trials. Data from multiple seasons for a maize hybrids performance is more valuable than results from a single season as they show the hybrids ability to perform over season with different weather patterns. Ultimately the most consistent performers will rise to the top of multiple year results. The more trials a cultivar has been in, the more confidence can be taken from its reported performance.
For the 2017/18 season, the number of sites increased to eight, with two of the maize seed companies in the programme hosting, managing and harvesting

MPT trials. The MPT system relies on companies collaborating and including their cultivars for the overall good of the industry. We encourage you to use the information in this booklet to help you make sound hybrid selection decisions.
We welcome any queries or suggestions on how we might further improve these booklets. Please contact us if you have ideas, or if you require any additional information not included in this booklet.