2018–19 summer: Soybean on black soil, Bundaberg
Grower: Department of Agriculture and Fisheries, Bundaberg. This is the first soybean crop grown at the research facility. The crop was planted by a contractor using GPS guided machinery. Tim Behrens is overseeing the field operations.
Location: Kalkie, Bundaberg
Monitored area: 10 ha, black soil (irrigation available)
- Cane harvested. Cane stool removed and trash worked into paddock by several cultivation passes including discing, ploughing and rotary hoeing.
- Knockdown herbicide (RoundUp – Group M glyphosate) applied pre-plant.
- Sodium molybdate was applied before planting.
- Soil is known to have high levels of manganese.
- 12 December 2018 – A6785 soybeans were sown in single rows 650–700 mm apart.
- Inoculated with Soybean rhizobium group H using water injection.
- Seeding rate was between 375 000 and 430 000 seeds per ha.
- 13 December 2018 – Post-emergence and pre-emergence herbicides were applied with Gramoxone for knockdown and Dual Gold for residual weed control.
- No irrigation required, crop grown on moisture stored from rain events. Approx. 40 mm fell around planting.
- In the coming week, the small weeds present will be removed using interrow cultivation.
- The roots are nodulating well – large, plump and pink inside.
- Healthy looking crop with significant growth over the last week.
- Small amount of old chew damage on leaves but did not see the causal agent.
- Inter-row cultivation for weed removal.
- Flower buds are developing.
- New leaves have a shriveled or ‘bubbled’ appearance.
- Tim is watching the weather closely before scheduling an irrigation as rain is forecast.
- Crop is green, healthy and filling-out nicely.
- Moderate amount of chew damage on leaves particularly in middle of rows with several stages of heliothis observed.
- A small population of jassids were observed.
- Weed removal operations successfully cleaned up the inter rows, however vine weeds were observed growing within the row and emerging through the crop canopy.
- Flower buds are still developing with more axillary buds appearing this week.
- New leaves still have distortions that seem to be resulting in some scarring.
- 17 January – Irrigation of soybean blocks was underway.
Vines present within the row.