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zinc deficiency

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Catalogue: Ground Cover
It is a simple fact that micronutrients (or trace elements) are only needed by crops and pastures in small amounts, but they play a major part in maximising production... Early identification of what is missing in the paddock is a key part of effective farm management, scientist Dr Nigel Wilhelm says... New research into national micronutrient deficiencies, supported by the GRDC and overseen by Dr Wilhelm's team from the South Australian Research and Development Institute (SARDI), has been examining tactics for detecting and managing trace-element deficiencies in crops...
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Catalogue: Ground Cover
Image of Nigel Wilhelm inspecting a young oat plant.. Growers should not rely on visible signs of micronutrient deficiencies in crops as symptoms of the most common micronutrient issues are vague and inconsistent... Zinc seed dressings are effective and will supply zinc to the young crop but cannot completely overcome a severe deficiency, nor will they provide benefit in subsequent years...
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Catalogue: Nuffield Scholar Reports
The aim of the report is to educate the reader as to the importance of TE"s, how to apply them, and to then generate discussion around the use of them more widely within agriculture ix and the food industry... Evan Ryan RYANAGPTYLTD 0428 298 031 03 5744 3662 ev_ryan@hotmail.com To assess the importance of trace elements in broadacre farming and to study methods to manage their application and benefits Currently few Australian broadacre farmers are using trace elements to increase their productivity and profitability Travel across North America and Europe interviewing farmers, researchers and advisors who use and recommend trace elements Trace elements are important both to plant growth and to human health... Trace element use can improve productivity and profitability for farmers and improve health outcomes for consumers...
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Catalogue: Broadacre Field Crops DAFF QLD
High-yielding maize crops require large quantities of soil nutrients... * Maximum rate for growers aiming for a 7 t/ha dryland crop or 10 t/ha irrigated crop from ground that has been cultivated for more than 25 years and has a history of summer crops (such as sorghum, maize, millet, sunflower, cotton) or has been double-cropped with winter cereals Symptoms of nitrogen deficiency include: light green or yellowish leaves, often with a V-shaped yellow area at tips of leaves premature drying along the midrib and leaf tips stunted and slow-flowering plants short and often poorly filled ears... Even if early soil moisture at planting has been adequate to produce maximum leaf area, moisture stress later causes leaf senescence and yield depression...
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Catalogue: Broadacre Field Crops DAFF QLD
High-yielding maize crops require large quantities of soil nutrients... * Maximum rate for growers aiming for a 7 t/ha dryland crop or 10 t/ha irrigated crop from ground that has been cultivated for more than 25 years and has a history of summer crops (such as sorghum, maize, millet, sunflower, cotton) or has been double-cropped with winter cereals Symptoms of nitrogen deficiency include: light green or yellowish leaves, often with a V-shaped yellow area at tips of leaves premature drying along the midrib and leaf tips stunted and slow-flowering plants short and often poorly filled ears... Even if early soil moisture at planting has been adequate to produce maximum leaf area, moisture stress later causes leaf senescence and yield depression...
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Catalogue: Broadacre Field Crops DAFF QLD
High-yielding maize crops require large quantities of soil nutrients... * Maximum rate for growers aiming for a 7 t/ha dryland crop or 10 t/ha irrigated crop from ground that has been cultivated for more than 25 years and has a history of summer crops (such as sorghum, maize, millet, sunflower, cotton) or has been double-cropped with winter cereals Symptoms of nitrogen deficiency include: light green or yellowish leaves, often with a V-shaped yellow area at tips of leaves premature drying along the midrib and leaf tips stunted and slow-flowering plants short and often poorly filled ears... Even if early soil moisture at planting has been adequate to produce maximum leaf area, moisture stress later causes leaf senescence and yield depression...
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Catalogue: GRDC Publications
Old leaves develop elongated grey to dark brown spots on or near the edges of the leaf, usually half way along the leaf quickly spreading towards the tip and base... Description Old leaves turn pale green and bronze-yellow areas develop in the mid-section of the leaf between the edge and mid-vein; these areas quickly extend towards the leaf tip until the top two-thirds of the leaf is bronze-yellow (orange-red in some varieties)... Old leaves become dull green and bronze-orange areas develop between the edge and mid-vein at the base of the leaf...
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Catalogue: GRDC Publications
Leaf damage can be caused by a range of diseases, herbicides and a number of nutrient and environmental stresses... The Grains Research and Development Corporation does not guarantee or warrant the accuracy, reliability, completeness or currency of the information in this publication nor its usefulness in achieving any purpose... The Grains Research and Development Corporation will not be liable for any loss, damage, cost or expense incurred or arising by reason of any person using or relying on the information in this publication...
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Catalogue: Broadacre Field Crops DAFF QLD
Early crops are more likely to have exposure to frost and growers should assess the frost risk for their area prior to sowing... To determine planting rate you need to know the target plant population, the number of seeds per kg, the germination percentage of the seed and the likely field establishment... A rule of thumb used by some is to grow malting barley, 0.4 kg of nitrogen is required for every mm of available soil moisture...
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Catalogue: Broadacre Field Crops DAFF QLD
Early crops are more likely to have exposure to frost and growers should assess the frost risk for their area prior to sowing... To determine planting rate you need to know the target plant population, the number of seeds per kg, the germination percentage of the seed and the likely field establishment... A rule of thumb used by some is to grow malting barley, 0.4 kg of nitrogen is required for every mm of available soil moisture...
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