You are here

crop demand

Catalogue: GRDC Updates (South)
Overall, our conclusion is that while many current uses of yield maps will tolerate low to moderate GPS error, the inability to procure accurate GPS signals will hinder the development of more sophisticated applications of the information for the interpretation of crop behaviour and machine guidance... SSC's limit crop production by limiting crop rooting depth limiting effective plant available water content (PAWC), as well as having direct toxic and nutrient imbalance effects 3... 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...
Related categories:
Catalogue: GRDC Updates (North)
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...
Related categories:
Catalogue: GRDC Updates (South)
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...
Related categories:
Catalogue: GRDC Factsheets
Applying P at depth (15 to 20cm deep on 50cm bands) can improve yields over a number of cropping seasons (if other nutrients are not limiting)... Limited P is now constraining yields in parts of the northern grains region, particularly in the vertosols (black and grey cracking clays)... The test needs to be done only every four to six years, and is most important in the subsoil layers...
Related categories:
Catalogue: GRDC Factsheets
Applying P at depth (15 to 20cm deep on 50cm bands) can improve yields over a number of cropping seasons (if other nutrients are not limiting)... Limited P is now constraining yields in parts of the northern grains region, particularly in the vertosols (black and grey cracking clays)... The test needs to be done only every four to six years, and is most important in the subsoil layers...
Related categories:
Catalogue: GRDC Factsheets
Applying P at depth (15 to 20cm deep on 50cm bands) can improve yields over a number of cropping seasons (if other nutrients are not limiting)... Limited P is now constraining yields in parts of the northern grains region, particularly in the vertosols (black and grey cracking clays)... The test needs to be done only every four to six years, and is most important in the subsoil layers...
Related categories:
Catalogue: GRDC Media
Australian research is beginning to reveal the impact of farming practices on soil microbiology and how this affects the supply of yield-boosting nutrients to crops... Dr Phillips said research was exploring whether previous crops influenced microbial community functioning in subsequent cropping years; whether differences in the amount and quality of residue/stubble impacted microbial communities responsible for transforming organic and mineral N to plant-available N; and whether agronomic practices such as tillage and depth of fertiliser placement could be strategically used to manipulate N-cycling microbial communities... Caption: Soil microbiologist Lori Phillips says current research is aimed at determining the make-up of microbial communities in the soil, their role in nutrient cycling and how farming practices influence microbial activity...
Related categories:
Catalogue: GRDC Research Summaries
Activity 1: Estimation of the actual amount of N fixed: In Australia, most estimates of FL-N fixation were determined using indirect methods, e.g. N balance estimates or nitrogenase activity measurements using acetylene reduction assay... While the estimates provide an indication of N fixation potential, they do not provide direct estimates of N fixed... Estimation of the actual amount of N fixed quantify the amount of N fixed - Acombination of 15N isotope tracer methodology and biochemical methods are being standardized to quanity the amount of 15N fixed using soils from South Australia (Calcorosol, Alfisol, Vertisol) and Western Australia (Sodosol)...
Related categories:
Catalogue: GRDC Research Summaries
Activity 1: Estimation of the actual amount of N fixed: In Australia, most estimates of FL-N fixation were determined using indirect methods, e.g. N balance estimates or nitrogenase activity measurements using acetylene reduction assay... While the estimates provide an indication of N fixation potential, they do not provide direct estimates of N fixed... Estimation of the actual amount of N fixed quantify the amount of N fixed - Acombination of 15N isotope tracer methodology and biochemical methods are being standardized to quanity the amount of 15N fixed using soils from South Australia (Calcorosol, Alfisol, Vertisol) and Western Australia (Sodosol)...
Related categories:
Catalogue: GRDC Updates
Using Crop Sensors In the US, Europe and Australia there is increasing interest in using crop sensors mounted on farm machinery (boom mounted) to monitor crop canopy performance... Influence of nitrogen timing and rate on yield t/ha - Lubeck cv Annuello 2007 NDVI correlation with Green Area Index (GAI) There are, as outlined below, a number of issues that would need to be clarified before NDVI readings could be used to calculate nitrogen inputs for cereal crops... Strength of correlation between growth stage and NDVI readings recorded with the Greenseeker assessed at the Inverleigh SFS trial site, Southern Victoria in 2007 - cv Mackellar...
Related categories:

Pages