Authors: Michael Moodie1, Lynne Macdonald2, Ray Correll3
Research Team: Mick Brady1, Todd McDonald1, Chris Davies1, Jack Desbiolles3, Therese McBeath2
1Frontier Farming systems, Mildura; 2CSIRO, Waite Campus; 3Rho Environmetrics, 4University South Australia, Mawson Lakes
Funded By: GRDC project CSP00203
Project Title:Increasing production on sandy soils in the low-medium rainfall areas of the southern region
Peer Review: Therese McBeath (CSIRO)
Key Words: Deep ripping, spading, organic matter inputs, nitrogen
- Deep ripping resulted in a significant increase in yield at the Ouyen site for a second consecutive season
- At Ouyen, annual ripping treatments resulted in a yield increase of 0.6 t/ha re while treatments which were only ripped in 2017 still yielded 0.4 t/ha better than the control.
- At Carwarp mechanical disturbance to 30 cm by spading or deep ripping provided a yield boost of 0.5t/ha however deeper ripping to 60 cm did not provide any significant yield benefits.
- Second year yield increases following spading of organic amendments in 2017 were evident for chicken litter (+0.5t/ha) but not for home grown hay sources (vetch, oaten) and Ouyen (2018).
- Over the two seasons, spaded chicken litter has doubled the yield achieved compared to the non-spaded controls.