School of Agriculture and Environment - The University of Western Australia trials

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Trial Contributor
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Year Trial site
The contribution of nitrogen fertilizer timing and placement in reducing the growth and seed production of ryegrass (Lolium rigidum Gaudin) in competition with wheat (Triticum aestivum L.)

This study determines the effect of N fertilizer placement, N fertiliser rate and N application timing on the competitive ability of wheat (Triticum aestivum L.) in dryland no-tillage cropping system in the Western Australian grainbelt.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 York WA WA
Research organisaton
The contribution of nitrogen fertilizer timing and placement in reducing the growth and seed production of ryegrass (Lolium rigidum Gaudin) in competition with wheat (Triticum aestivum L.).

This trial was located in York in the grainbelt of Western Australia and investigated combinations of UAN (Urea Ammonium Nitrate) Placement (streamed or broadcast), UAN rate (low and high input) and UAN timing (early or late in the crop growth) for management of ARG.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 York WA WA
Research organisaton
The contribution of nitrogen fertilizer timing and placement in reducing the growth and seed production of wild radish (Raphanus raphanistrum) in competition with wheat (Triticum aestivum L.).

To determine the effect of N fertilizer placement, N fertiliser rate and N application timing on the competitive ability of wheat (Triticum aestivum L.) in reducing the growth and seed production of wild radish (Raphanus raphanistrum) in dryland no-tillage cropping system in the Western Australian grainbelt.

School of Agriculture and Environment - The University of Western Australia
GRDC
2020 Avondale farm WA
Research organisaton
The interaction between seeding rate and row spacing of hybrid and open pollinated canola (Brassica napus) varieties on annual ryegrass (Lolium rigidum) growth and seed production.

The trials located at Miling and Kojonup in the grainbelt of Western Australia investigated combinations of canola variety (hybrid or open pollinated), crop row spacing (25 or 50cm) and canola seeding rate (20, 35 or 50 plants/m2). The average seedbank at the Miling and Kojonup sites were 3,630 seeds/m2 and 23,240 seeds/m2 respectively.  Annual ryegrass (ARG) establishment was reduced in hybrid canola treatments seeded at narrower 25 cm row spacing. Decreasing crop row spacing (from 50 to 25cm) and increasing canola seeding rate (from 20 to 50 plants/m2) was found to reduce ARG establishment in the absence of herbicides. At the Kojonup site, ARG seed production was reduced by hybrid varieties (Trophy) and higher plant densities (50 plants/m2). However due to the low rainfall at the Miling site, no interactions were identified. Canola yield in this study was increased in hybrid variety (Trophy) treatments especially at higher seeding rates (50 plants/m2). Interestingly, however, canola seeded at the wider row spacing (50cm) consistently out yielded the corresponding variety and seeding rate combination at the narrower 25cm row spacing. This study conducted two trials in 2018 (Mingenew and Cunderdin) and 2019 (Miling and Kojonup). Multi- environment trial analysis for the combined 2018 and 2019 data to be completed.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 Kojonup WA
Research organisaton
The interaction between seeding rate and row spacing of hybrid and open pollinated canola (Brassica napus) varieties on wild radish (Raphanus raphanistrum) growth and seed production.

This trial was located at Cunderdin in the grainbelt of Western Australia and investigated combinations of canola variety (Hybrid or open pollinated), crop row spacing (25 or 50cm) and canola seeding rate (20, 35 or 50 plants/m2) on wild radish (WR) competitiveness and seed production.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 Cunderdin ACT
Research organisaton
The interaction between seeding rate and row spacing of hybrid and open pollinated canola (Brassica napus) varieties on wild radish (Raphanus raphanistrum) growth and seed production.

To determine the effect of factorial combinations of seeding rate, row spacing and pollination type on canola yield and wild radish fecundity.  

School of Agriculture and Environment - The University of Western Australia
GRDC
2020 Avondale farm WA
Research organisaton
The interaction between seeding rate and seed size of hybrid and open pollinated canola (Brassica napus) varieties on annual ryegrass (Lolium rigidum) growth and competition.

Trials located at Miling and Kojonup in the grainbelt of Western Australia investigated combinations of canola variety (hybrid or open pollinated), canola seeding rate (20, 35 or 50 plants/m2) and canola seed size (<1.8, >2.0mm diameter) on ARG management.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 Kojonup WA
Research organisaton
The interaction between seeding rate and seed size of hybrid and open pollinated canola (Brassica napus) varieties on wild radish (Raphanus raphanistrum) growth and competition.

To determine the optimal combinations of canola cultivar, seeding rate, and seed size on wild radish seed production and canola growth and yield.

School of Agriculture and Environment - The University of Western Australia
GRDC
2020 Avondale farm WA
Research organisaton
The interaction between the seeding rate and row spacing of hybrid and open pollinated canola (Brassica napus) varieties on annual ryegrass (Lolium rigidum) growth and seed production

The objective of this study is to determine the optimal combinations of canola cultivar, seeding rate and row spacing on annual ryegrass seed production and canola growth and yield.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 WA
Research organisaton
The interaction between the seeding rate and row spacing of hybrid and open pollinated canola (Brassica napus) varieties on wild radish (Raphanus raphanistrum) growth and seed production

This study was conducted to determine the effect of factorial combinations of seeding rate, row spacing and pollination type on canola yield and wild radish fecundity.  

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 WA
Research organisaton
The interaction between the seeding rate and seed size of hybrid and open pollinated canola (Brassica napus) varieties on ryegrass (Lolium rigidum) growth and competition

The objective of this study is to determine the optimal combinations of canola cultivar, seeding rate and seed size on annual ryegrass seed production and canola growth and yield.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 WA
Research organisaton
The interaction between wheat (Triticum aestivum) establishment timing and pre-emergent herbicides choice on annual ryegrass (Lolium rigidum Gaud.) growth and competition.

This research aims to investigate the effect of wheat time of sowing and seeding rate, on the effectiveness and degradation of pre-emergent herbicides commonly used to control annual ryegrass in no tillage farming systems.

School of Agriculture and Environment - The University of Western Australia
GRDC
2019 York WA WA
Research organisaton
The interaction between wheat (Triticum aestivum) establishment timing and pre-emergent herbicides choice on annual ryegrass (Lolium rigidum Gaud.) growth and competition.

This research aims to investigate the effect of wheat time of sowing and seeding rate, on the effectiveness and degradation of pre-emergent herbicides commonly used to control annual ryegrass in no tillage farming systems.

School of Agriculture and Environment - The University of Western Australia
GRDC
2020 Pingelly WA
Research organisaton