Agrivision Soya Trial – Interim Field Report
Client: Agrivision Somahwe Farm, Mpongwe
Crop: Soya Beans
Product: ACF-SF+ / ACF-SF (Dryland Kits)
Trial Application: Approximately 200 hectares treated with 20l/ha ACF-SF+ at planting and 20l/ha ACF-SF 45 days from planting. 50% of each pivot as trial and 50% as control.
ACF-SF+ applied via pivot at planting
ACF-SF applied via pivot at 6 weeks
Application Notes – ACF-Dryland Kits
The intention was to treat 50% of each pivot to total approximately 200 hectares for the trial.
ACF-SF+ was applied to 50% of each pivot at planting, applied through irrigation
ACF-SF was applied to 50 % of each pivot, 45 days from planting. Due to a technical problem with pivot positioning, the application was offset by 90 degrees and thus quartering the trial area into 4 sections as shown in the picture above.
Pivot 42 & 43 have had technical problems due to sub station explosion. Pivot 42 foliar application being applied on the 15th Jan 2019. Pivot 43 foliar application subject to pivot repair completion.
Pivots 40 and 44 were chosen for root sampling. Each pivot is dived into four trial blocks, two samples (approximately 6-8 stalks per sample) were taken from each control area and a further two samples were taken from the area treated with both ACF-SF+ and ACF-SF.
The samples were removed by spade, these were chosen and removed by Stefan. The root samples were washed in a bucket to remove soil and to preserve root structure.
Photographs were taken of the sample field and of the root samples.
Field observations and discussion
It was brought to our attention that there seems to be a problem with Tap Root development across the farm, Stefan suggested that this could possibly be due to early nematode damage to the tap root.
There are some areas in the field with drainage problems, this can be seen in the crop development and there is some fungi and alae present in these areas. It must be added that this is the height of the rainy season.
Root samples taken at two different areas in the control sections of the selected trial pivots show that there is impeded tap root development, this can be seen in the pictures below. The treated section however shows better tap root and nitrogen nodule development.
Pivot 40 showed uneven growth, this is due to water logging and old ant hill areas. There was however still a noticeable difference in the growth uniformity between the control and the trial section.
Some leaf blight was observed in all of the sampled areas.
Pivot 40 - Control Pivot 40 - ACF-SR+ / ACF-SR
Pivot 40 - Control
Impeded tap root development
Some nitrogen nodule development
Hair root close to the surface (0 – 50mm, in some cases to 75mm)