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leaf area

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Catalogue: GRDC Updates (North)
We have applied late nitrogen over the past two seasons to a portion of our wheat crop to successfully grow and deliver Prime Hard (PH) wheat... My plan is for this paddock to receive top-dress nitrogen in late September or early October for PH 13% to 14% protein, only, if the profile is full and budgets indicate it is worth the risk... Goulburn has hard seed levels of 30% measured at the end of April...
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Catalogue: GRDC Updates (South)
We have applied late nitrogen over the past two seasons to a portion of our wheat crop to successfully grow and deliver Prime Hard (PH) wheat... My plan is for this paddock to receive top-dress nitrogen in late September or early October for PH 13% to 14% protein, only, if the profile is full and budgets indicate it is worth the risk... Goulburn has hard seed levels of 30% measured at the end of April...
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Catalogue: Ground Cover
The GEKKO Phenotyping Tractor - an all-seeing mobile platform that will speed up crop improvement... The objective is to better understand why a particular variety (genotype) performs a certain way, then address identifiable causes for underperformance that can be rectified or isolated from other data, so a genotype that might otherwise have potential is not simply discarded on the rudimentary evidence of grain yield alone... Professor Hammer's job is to run the data collected by the phenotyping tractor through analytical models to identify 'confounding' factors and stop them from obscuring the identification and potential use of other genetic gains that are bound to exist in the tens of thousands of genotypes that are screened...
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Catalogue: GRDC Final Reports
The objectives of the work were the development of vigorous, long coleoptile wheat germplasm; the release of cycle 4 recurrent selection (RS) high vigour germplasm; and enhanced selection efficiency through genetic studies of early vigour and coleoptile length.. Mean squares for general combining ability (GCA), specific combining ability (SCA) and reciprocal effects for coleoptile length and diameter measured on parental and F 1progeny from a 12 12 wheat diallel grown at four different soil temperatures (11, 15, 19 and 23 C)... In summary, work in Output 3 resulted in: 1...
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Catalogue: GRDC Final Reports
The application of potassium (K) fertiliser at rates up to 40 kg/ha of K significantly decreased the percentage of leaf area diseased for spot-type net blotch and powdery mildew of barley... The chloride source significantly reduced the percentage of leaf area diseased at rates of 10 and 20 kg/ha of applied K. The two sources of K (KCl, or K 2SO 4) gave significantly different yield response curves where powdery mildew was present... In regions prone to leaf disease we suggest farmers take soil samples before seeding to determine soil K levels...
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Catalogue: GRDC Updates
A new crop of conidia can be produced within 5 to 7 days leading to rapid spread up the canopy when conditions are favourable... The paper presents only the details and results of Trial #1 - Hermitage 2010... Ten randomly selected plants per plot were marked and on 5 dates leaves in the lower, middle and upper third of the canopy were assessed for % leaf area infected...
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Catalogue: GRDC Final Reports
The project has identified genomic regions, developed germplasm (alternative dwarfing genes, leaf-rolling, greater leaf area) and established screening methodologies (longer coleoptiles, leaf area, transpiration efficiency) targeted to improving water-use efficiency and yield under drought... The project has confirmed and/or extended genetic variation for traits with potential for use in breeding for improved performance under drought, identified the nature of inheritance for some of these traits and underlying genetic control through quantitative trait loci (QTL), and released germplasm containing genes for traits not present within Australian breeding programs... The F1 progeny were assessed in seedling trays and produced leaf-one widths ranging between 2.8 and 7.6 millimetres (mm)...
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