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GRDC Updates (South)

Here you will find all the papers presented at GRDC updates in the Southern region.

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Based on this, we estimate that water used by weeds in the wet weedy (+I+W) treatment up to the midfallow period was 593 x 1688 (biomass) / 10 000 = 100 mm; for the dry weedy (-I+W) treatment water use is estimated at 30 mm... The results showed that Zn uptake by plants and in the grain could be most improved by mixing Zn with N and P (as technical grade MAP and ammonium nitrate dissolved in water) in a single solution and injecting it into the soil to a depth of 40 cm... Results from our laboratory experiments have confirmed that fluid forms of P have very different physical and/or chemic...
The proportion of the total seasonal water use which is used by a crop after flowering goes a long way to determining the yield and quality of the grain produced... The management plan has to cater for the variation between seasons that occurs, and requires flexibility... Growers need to investigate their soils for themselves...
Collie Grains Research Update for Growers.. We propose a standard method of rating varieties for disease based on one used by chickpea breeders and pathologists worldwide... Grains Research Update - Collie 28 thFebruary 2002 pathogenicity together with environmental interactions, determine severity much yield is lost in a given environment...
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...
Corn developmental stages used in this article are based upon the Iowa State Publication "How a Corn Plant Develops" (Ritchie et al., 1997)... The paper provides an illustration of the application of these tools to example farms and farming systems on the Atherton Tableland... of application improves penetration into the canopy - 8 km/hr is the maximum..
GRDC Taxonomy:
Application of nitrogen to most crops will affect grain yield, grain protein or both, depending on the available nitrogen supply relative to crop demand... Soil analysis conducted recently have indicated that EC, sodicity and chloride content have increase in the root zone of some soils due to capillary rise arising from the extended dry period... Environment mean yield (t/ha) d) Reduced tillering Several years ago I proposed that the incidence of haying-off could be reduced by increasing the storage of stem sugars by several means...
Grain drying and aeration to manage wet grain... An export oaten hay industry has developed Herbicides are still widely used, but in more combinations or uses not envisaged before (eg crop topping pulses).. Factors Affecting Performance of Fallow Herbicides In successfully using spray adjuvants to optimise performance of fallow herbicides, we need to understand the factors affecting herbicide activity...
GRDC Taxonomy:
" Grains Research Update, Dalby 13 thMarch 2000 Contents WHITE GRAIN IN WHEAT DELIVERIES................................................................................................ Fertiliser will increase yield and protein The application of nitrogen fertiliser to most wheat crops will affect grain yield, grain protein or both, depending on the available nitrogen supply relative to crop demand... Field Peas There is a significant interest in field peas as a desirable protein/energy source in the Northern Region, particularly in the poultry industry...
GRDC Taxonomy:
The crops should be well nodulated and highyielding and the residual nitrogen benefits should be effectively captured by the following crop or pasture... Research by Mike Hughes, NSW DPI Grafton, and colleagues during the 1980s established that a 2.6 t/ha crop fixed about 265 kg N/ha (Hughes and Herridge 1989)... Bug thresholds for edible soybeans are considerably lower than for crushing beans and range from 0.33-0.6/m 2depending on crop size* (no of seeds per plant), the threshold being higher in larger crops...
GRDC values the contributions made by local sponsors to the Nyngan Grains Research Update.. Grains Research Update - Nyngan 19 thFebruary 04 as well as on previous crops or pastures that may have made biopores through the subsoil which roots of the current crop can colonise... Grains Research Update - Nyngan 19 thFebruary 04 rotation late or achieving incomplete kills with herbicide will allow moisture to be extracted from the soil profile when moisture should be accumulating...

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