Minnipa Agricultural Centre SA trials

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Trial	Contributor Funding sources	Year	Trial site

Effects of gypsum and legumes on soil pH and soil organic C - Exp 1 To examine the effect of gypsum on soil pH and soil C and whether changes in soil pH could alter productivity of the following cereal crops.	SARDI Minnipa Agricultural Centre DAWR	2014	Minnipa Agricultural Centre SA
Research organisaton
Grain & Graze 3 - The impact of livestock on paddock health A long-term study was established at the Minnipa Agricultural Centre from 2008 to 2014 (EPFS Summaries 2008 to 2013) to assess the impact of grazing on crop and pasture production and soil health and also to evaluate this from a systems perspective. The seven year demonstration with a wheat, wheat, pasture (volunteer and sown annual medic), wheat, pasture (self-regenerating annual medic), wheat and wheat rotation was also established to determine whether productivity could be improved under a higher input system compared to a lower input and more traditional system and what affect this had on soil fertility.	SARDI Minnipa Agricultural Centre GRDC	2014	Minnipa Agricultural Centre SA
Research organisaton
Grain & Graze 3 - The impact of livestock on paddock health To test whether soil fertility and health could be improved under a higher input system (e.g. higher fertiliser and seeding rates, establishment of improved pasture) compared to a lower input and more traditional system (district practice seed and fertiliser inputs, volunteer pasture). The six year (2008-2013) rotation of: wheat, wheat, pasture (volunteer and sown annual medic), wheat, pasture (annual medic – self regenerating) and wheat, was also split into grazed and un-grazed treatments in both the high and low input systems to establish the relative impact of grazing.	SARDI Minnipa Agricultural Centre GRDC	2013	Minnipa Agricultural Centre SA
Research organisaton
Grain & Graze 3 - The impact of livestock on paddock health A long-term study was established at the Minnipa Agricultural Centre from 2008 to 2015 (EPFS Summaries 2008 to 2014) to assess the impact of grazing on crop and pasture production and soil health and also to evaluate this from a systems perspective. The eight year demonstration with a wheat, wheat, pasture (volunteer and sown annual medic), wheat, pasture (self-regenerating annual medic), wheat and wheat rotation was also established to determine whether productivity could be improved under a higher input system compared to a lower input and more traditional system and what affect this had on soil fertility.	SARDI Minnipa Agricultural Centre GRDC	2015	Minnipa Agricultural Centre SA
Research organisaton
Grain & Graze 3 - The impact of livestock on paddock health A long-term study was established at the Minnipa Agricultural Centre from 2008 to 2016 (EPFS Summaries 2008 to 2015) to assess the systems impact of grazing on crop and pasture production, and soil health.	SARDI Minnipa Agricultural Centre GRDC	2016	Minnipa Agricultural Centre SA
Research organisaton
Improving medic pastures in low rainfall mixed farming systems - how to get the most ‘free’ N To look at current techniques used by farmers, or recommended by consultants, to improve medic pastures and determine the most effective method to optimise N₂-fixation. Biomass, nodulation and N₂-fixation differences between management practices, including inoculation treatments on both sown and regenerating medic stands were measured. The trial also investigated if grazing medic pastures in the break phase of the rotation benefits or impedes nodulation and subsequent N₂-fixation.	SARDI Minnipa Agricultural Centre GRDC	2015	Minnipa Agricultural Centre SA
Research organisaton
Mechanisms that lead to yield loss after grazing To determine the ability and drivers of grain yield recovery of two different wheat varieties after grazing. To investigate whether N has the ability to assist in grazing recovery of yield and/or quality compensation. Similar trials were conducted for the GRDC funded Grain & Graze 3 project in 2015 across other agro-ecological regions including Mid-North of South Australia, Wimmera Mallee region of Victoria and Southern Victoria to determine regional and seasonal differences.	SARDI Minnipa Agricultural Centre GRDC	2015	Minnipa Agricultural Centre SA
Research organisaton