Spading trials to improve mallee sands - Chris McDonough (IEA)
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Transcript of Spading trials to improve mallee sands - Chris McDonough (IEA)
SESSION OUTLINE• Brief Overview of Karoonda Site Results• Key Principals of Spading Success• Lowbank Trial Results and Discussion
KAROONDA SITE ABOVE SEEP AREA
Non wetting sand over clay
Control
Spaded
Non wetting sand over claySpaded with
Chicken Manure
YIELD RESULTS
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Unmodified
Spaded
CM 6 t/ha spaded
CM 9 t/ha spaded
Yield t/ha
Modification: Unmodified Spaded CM 6t/ha Spaded
CM 9 t/ha Spaded
Average grain yield (t/ha) 1.55 2.17 3.29 2.8
Income @ $220/t $ 342 $ 478 $ 725 $ 616
Additional income $ - $ 136 $ 383 $ 274
Cost of modification $ - $ 100 $ 310 $ 415
Increase $ in first year $ - $ 36 $ 73 -$ 141
WEED DIFFERENCES…?
Spaded Control
WHY SPADING WITH CHICKEN MANURE WORKSBreaking Deep Compaction
WHY SPADING WITH CHICKEN MANURE WORKSSignificant increase to nutrition and organics
(photo from Nigel Wilhelm, SARDI)
Zinc Deficient
Zinc Enriched
LOWBANK SPADING TRIAL RESULTS
ACKNOWLEDGEMENTS
Karoonda and Lowbank Agricultural Bureaus
