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crop canopy

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Catalogue: GRDC Media
Canopy management refers to the management of the green surface area of the crop canopy to optimise crop yield and inputs... "In WA, we tend to grow big, bulky cereal crops - we use high seeding rates and put out a lot of nitrogen early - and then crops can run out of moisture come grain filling time, resulting in a lower grain yield than would have been achieved with a thinner canopy... Mr Knell said the project would validate canopy management principles already learnt under research in other grain growing areas including high rainfall zones in South Australia, Victoria and New Zealand...
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Catalogue: GRDC Updates
Preliminary studies carried out as part of the project last season, sought to establish whether crop reflectance readings could be related to crop size and plant nitrogen uptake at the key timings for in-crop nitrogen application tillering to flag leaf emergence (GS22 - GS39)... Much of the work on wheat has been conducted in higher yielding irrigated scenarios following Sorghum so that soil nitrogen reserve is sufficiently depleted to ensure a response to nitrogen... Furthermore if a split nitrogen application during stem elongation (GS30 start of stem elongation followed by GS33 - 39 third node to flag leaf emergence) could be employed in the knowledge that it was not inferior to other N strategies, it would not only give a greater flexibility to respond to the season in terms of spring rainfall (for dryland growers), but would also allow the growth changes (e.g. NDVI "change map") to be recorded with crop sensors (on a spatial basis) following the application of the first dose...
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Catalogue: Ground Cover
Advancing management of crop canopies research report image.. Advancing the management of Crop Canopies.. The guide covers the link between growth stage and crop physiology and the implications for canopy management and disease control in wheat and barley...
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Catalogue: GRDC Publications
Influence of fungicide rate (mean of fungicide products - four site mean) Stem rust control assessed over the four trial sites revealed that using high rates was essential for the control of the disease, even if the fungicide had been applied prophylactically (before infection was visible in the crop)... Influence of cultivar resistance and fungicide application (Prosaro ) on yield and stem rust severity measured on the flag sheath 18 days after fungicide application at early dough (GS82) and assessed at mid dough - physiological maturity (GS85-90) - Bairnsdale, Gippsland, Victoria, 2010... The yield potential for the crop with no nitrogen applied is estimated at GS30 from the results of numerous of trials conducted in that region where NDVI at GS30 is divided by the number of growing degree days (GDD) greater than 0 C since planting, referred to as the INSEY units (in season estimate of yield)...
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Catalogue: GRDC Final Reports
Through a national series of 40 trials and 20 Soil 2 Grain workshops, this project generated a series of guidelines on the tactical use of agrichemicals and nitrogen (N) in cereals during stem elongation... Disease management outputs included the construction of a green leaf duration calculator for making better fungicide decisions, management guidelines for the use of foliar fungicides to control stem rust in wheat, stripe rust control in wheat varieties with adult plant resistance (APR) and powdery mildew in barley... Using a conservative 5% uptake (based on losses estimated by Murray & Brennan of crops with powdery mildew in WA and leaf rust susceptible barley in the northern region) these guidelines could increase margins by an estimated $5 million/year...
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Catalogue: GRDC Updates
Keywords: canola, windrowing, direct head, desiccation.. Ideal windrow timing is a balance between leaving the crop standing as long as possible to maximise yield, while minimising shattering losses... Pod development can last over 3-5 weeks, with lower pods maturing before higher ones...
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Catalogue: GRDC Updates (South)
Modelling the risks involved with splitting N application at Bellata over a number of years.. Current best nitrogen management practice is generally to assess soil water and soil nitrogen levels before sowing, estimate yield potential and fertilise all prior to, or at, sowing because it is too risky to apply in-crop... There is a large decrease in frequency from one to two rainfall events, suggesting growers would need to be very organised and be able to respond in a short time frame to take advantage of incrop N application opportunities...
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Catalogue: GRDC Factsheets
Understanding and applying the principles of canopy management, allows decisions on the most profitable use of inputs and the most appropriate target yield to be made... Applying nitrogen (N) or fungicide at stem elongation increases the opportunity to match input costs to the potential yield for that season... The visual difference can be quantified by using crop sensors that measure the light reflectance from the crop canopy...
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Catalogue: GRDC Factsheets
Understanding and applying the principles of canopy management, allows decisions on the most profitable use of inputs and the most appropriate target yield to be made... Applying nitrogen (N) or fungicide at stem elongation increases the opportunity to match input costs to the potential yield for that season... The visual difference can be quantified by using crop sensors that measure the light reflectance from the crop canopy...
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Catalogue: GRDC Factsheets
Understanding and applying the principles of canopy management, allows decisions on the most profitable use of inputs and the most appropriate target yield to be made... Applying nitrogen (N) or fungicide at stem elongation increases the opportunity to match input costs to the potential yield for that season... The visual difference can be quantified by using crop sensors that measure the light reflectance from the crop canopy...
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