spading trials to improve mallee sands - chris mcdonough (iea)
TRANSCRIPT
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SESSION OUTLINE• Brief Overview of Karoonda Site Results• Key Principals of Spading Success• Lowbank Trial Results and Discussion
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KAROONDA SITE ABOVE SEEP AREA
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Non wetting sand over clay
Control
Spaded
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Non wetting sand over claySpaded with
Chicken Manure
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YIELD RESULTS
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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
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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
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WEED DIFFERENCES…?
Spaded Control
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WHY SPADING WITH CHICKEN MANURE WORKSBreaking Deep Compaction
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WHY SPADING WITH CHICKEN MANURE WORKSSignificant increase to nutrition and organics
(photo from Nigel Wilhelm, SARDI)
Zinc Deficient
Zinc Enriched
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LOWBANK SPADING TRIAL RESULTS
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ACKNOWLEDGEMENTS
Karoonda and Lowbank Agricultural Bureaus