Our butternut hand harvesting to collect research data was completed on the 9th and 10th of March. Our hand harvest samples were taken from 3 m × 2 m areas within each of the four subplots of each plot; 16 per treatment, 48 in all. All butternuts within the sample area were cut from the…
Category: soil health
Measuring Soil Infiltration
We were delighted to have Carys Luke join us as our Summer Intern in 2025-2026. Carys’ key project was measuring soil infiltration rates using disc permeameters. These devices work under tension, so water has to be pulled into the soil by capillary forces. By controlling the amount of tension, we can set the soil pore…
Cyclone Gabrielle Research Symposium
Lessons for the management of highly productive land Two years after Cyclone Gabrielle devastated the Hawke’s Bay and Tairawhiti regions, what have we learned about recovery? Cyclone Gabrielle struck New Zealand in February 2023, causing widespread flooding that affected Hawke’s Bay, Gisborne/Tairawhiti, and Northland. In Hawke’s Bay and Tairawhiti, Cyclone Gabrielle was characterised by the…
Biodiversity Strips Update
We established two new biodiversity strips on the MicroFarm in 2025, in addition to the two from 2024. One of the new strips, which is located under the irrigator wire, includes alyssum, calendula, and native ground covers. The other strip which is along a fenceline has the A Lighter Touch annual flower strip mix, which includes alyssum,…
Carbon Positive: Butternuts
The butternuts have grown rapidly since being planted on the 15th of November. All three treatments have nearly reached full canopy cover. At this stage, the main differences we’re observing are between plots within treatments, rather than clear differences between the three treatments. The Operation Advisory Group has met weekly to observe how the butternuts…
Carbon Positive: Butternut Planting to Side Dressing
Planting The butternuts in the Carbon Positive trial were planted on the 15th of November. Before the butternuts emerged, there was a high weed pressure in the conventional treatment. Therefore, it was sprayed with Buster, while the other two treatments were not. Emergence When the butternuts started to emerge, we noticed there was cutworm damage…
Nitrate Levels on the MicroFarm
Throughout the Carbon Positive Trial, Soil Nitrate levels down to 30cm have been monitored fortnightly. During the tomato crop (26/10/2023 – 6/3/2024), the Regenerative treatment had significantly lower nitrate levels than the Conventional and Hybrid treatments, despite all three receiving similar amounts of nitrogen. This lower nitrate level was likely due to the breakdown…
Cyclone Gabrielle Research Symposium
Lessons for the management of highly productive land In November, we co-hosted a research symposium with Vegetable Research and Innovation and the Foundation for Arable Research. The symposium brought together those who had investigated Cyclone Gabrielle’s impacts on highly productive land to present and discuss findings and observations, and draw out lessons to aid land…
Introducing Carys Luke, our Summer Intern
Hi, I’m Carys, I have just completed study for my Bachelor of Agricultural Science with honours at Lincoln University. My honours project investigated the potential of struvite (a recycled, acid-soluble phosphate fertiliser) as an alternative to single superphosphate for potato production. This experiment compared results when used on soils of high and low phosphate-retention capacities….
Soil Infiltration Calculator
We have launched an online web calculator to process soil infiltration rate measurements collected using a Disc Permeameter. The calculator analyses measurements made at different tensions. It is a beta product, primarily made to assist us in assessing soil infiltration, porosity etc. We are keen for any feedback! Disc permeameters (also called tension infiltrometers) are…