The wheat varieties bred for traditional wheatbelt with the low and medium rainfall may limit yield potential when grown in the high rainfall area. Lengthening the construction period duration (CPD) of the spike growth may increase the sink size and therefore potential yield. The aim of this study was to evaluate the relationships between yield, flowering time and the duration of spike growth period and to investigate whether yield can be improved by lengthening CPD.
Omission trials are a good visual way of highlighting the importance of each nutrient. In this trial we looked at each macronutrient and its importance to canola. Soil tests run through NUlogic suggested the potential for deficiencies in nitrogen (N), sulphur (S) and possibly potassium (K). This trial was conducted in Dandaragan on sandy loam soil. The site was very responsive to nitrogen (N) fertiliser.
This trial was designed to assess amelioration of subsoil acidity using a range of tillage methods for incorporating surface applied lime into acidic subsoils and the impacts of tillage and lime on crop productivity. The trial site was held on deep yellow sand in Dandaragan and consisted of eight tillage treatments with three lime rates applied.
These projects aimed to address the questions "Is this paddock performing up to potential, and if not, why not?" by persuading interested growers to apply test strips of various management practices (windrows, fertilisers, lime, wetting agents, cultivation) across their paddocks and soil types. The presence or absence of visual responses to these strips should stimulate further plant, tissue and soil sampling for analyses and the total results would be interpreted by experts. Lack of participation in the diagnostic projects, considerable value was gained from opportunistic sampling and diagnostics associated with observed growth variations in paddocks from crops across windrows and from better growth patches.
This trial was one of a series (other trials at Eradu, Cunderdin, Esperance) investigating the value of at-seeding fungicides in terms of replacing early foliar fungicides or supplementing later foliar applications. The trial was located in Dandaragan. The results showed that fungicide seed treatment or in-furrow did not affect germination or emergence.
This trial was conducted in Dandaragan to determining the value in $/ha for each weed control component in the canola crop within specific herbicide technology systems and then developing a software model to calculate the individual and cumulative value to growers of each of these elements for weed control in a “Integrated Weed Control Package”. The site experienced low starting rainfall with staggered plant emergence and then with further rainfall plot populations were within 75 to 85% of targeted plants/m2. All pests and diseases were controlled to an acceptably high level.
Local agronomists in the West Midlands area have noted over time nutrient levels such as phosphorus are declining in soils with high yield potential and increasing in low potential soils. Variable rate technology can assist replace P in the high zones and reduce P applied in the low performing zones reducing the risk of nutrient leaching and improving profitability for farmers. However there are still some barriers to adoption.
This case study aims to demonstrate the application of variable rate technology to adjust inputs as required based on soil test results and predicted yield potentials to reduce nutrient enrichment or depletion that leads to poor soil health. This trial was conducted in Dandaragan on yellow sandplain soil.
The purpose of the barley NVT trials at Dandaragan is to provide growers and their advisors with independent information on the performance of newly released varieties of canola relative to the current commercial varieties grown in the area. The intention is to have two years of data available on the NVT website at the time each new variety is made available for commercial production.The 2015 trial was located in Dandaragan on loam over heavy cay soil.
This trial aims to assess the effectiveness of simple and cheap ‘bolt-on’ attachments to deep ripper tines at incorporating topsoil and applied lime into acidic sandplain subsoils. This experiment was established in Dandaragan on a red loamy sand. The Long Bottom Boots functioned reasonably well at first, but tended to plug with soil from underneath after multiple passes and on finer textured soil to the south of the trial area.
This report is an evaluation of Lupin stage 3/4 advanced lines for National Variety Testing. The 2015 Dandaragan trial demonstrated relatively high yields. However the trial statistical analysis revealed a high level of variation in the results, thus rendering the findings of lower value than average in terms of attempting to select best performing breeding lines or cultivars.
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