
This independent trial run by PastureFirst in Waikato, NZ was a plot replicated eld trial conducted between October 2023 and February 2024 to evaluate the effect of EM Fert Enhance on maize yield. The results showed a statistically significant increase in yield was achieved by using EM Fert Enhance - 34.1t, over the control - 30.0t. EM Fert Enhance was applied at a rate of 2 x 10Kg per ha applications and provided a significant economic response over the control.
Treatment effects were statistically significant (P < 0.001), with a low coefficient of variation (CV = 5.4%), indicating a consistent treatment response across replicates.

This ssecond independent trial run by PastureFirst in Hawkes Bay showed Maize dry matter yield varied across treatments, with several EM-based programmes producing higher yields than both the untreated control and fertiliser-only treatments (Table 3; Figure 5).
The highest yields were observed in the EM Soil & Crop + 40 kg N/ha (29.30 t DM/ha) and Plant-Stim + 40 kg N/ha (29.45 t DM/ha) treatments. These were significantly higher than the urea-only treatments (40 and 80 kg N/ha), which produced yields of 23.02 and 23.07 t DM/ha, respectively.
The untreated control yielded 23.94 t DM/ha and did not differ significantly from all treatments; however, most EM-based treatments produced higher yields than the control. Treatments combining EM products with reduced nitrogen inputs (40 kg N/ha) consistently produced among the highest yields within the trial.
Overall treatment effects were statistically significant (P = 0.0385), although variability between treatments was observed (CV = 12.88%).
Key Findings
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Nitrogen Reduction
Plant-Stim combined with 40kg N/ha produced a 23% increase in dry matter yield compared with the untreated control, demonstrating the potential to reduce nitrogen inputs while maintaining crop performance.
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Yield Performance - +14%
Fert Enhance increased maize dry matter production by approximately 14%, delivering more harvested feed per hectare under commercial growing conditions.
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Commercial Return
$500/ha Additional Value - maize production generated significantly more feed value than the cost of treatment, producing a strong return on investment for growers.
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