Over the past four years, the effect of pyrethrum marc on vegetable crops has been compared with biochar, oaten chaff and conventional fertilisers at a trial site in Tasmania.
Pyrethrum marc can offer benefits as a soil conditioner and also as a source of nutrients for crops. Amendments can provide benefits for one or more years after application. Therefore, soil testing and monitoring combined with a fertiliser program is important for making the most of the economic benefits. Based on the crops grown and yields achieved in this trial, if pyrethrum marc was $60-65/t delivered, it would provide at least similar returns to conventional fertiliser.
Read this fact sheet to learn more about the trial, crops grown, treatments, and results.
