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phosphorous management

Catalogue: GRDC Updates
For the majority of situations, farmers will need to inoculate the seed or soil with the appropriate strain of rhizobia at sowing in order to ensure good levels of nodulation... The NSW Department of Primary Industries and other state Departments of Agriculture take the conservative approach and recommend that all legumes are inoculated at sowing... There are far less problems with unnecessary inoculation than not using inoculants when they are needed...
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Catalogue: GRDC Updates
Early availability to phosphorus is crucial, phosphorus deficiency limits wheat grain yield principally by depressing early growth, leaf emergence rate and maximum rate of tiller emergence (Rodriguez et al. 1999).. Better placement of phosphorus has the potential to increase phosphorus use efficiency in cropping systems on all soil types... Table 1 notes: Mn, Cu, Zn and B are measured in g/tonne (*)...
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Catalogue: GRDC Updates
PLANT TISSUE TESTING - AN UNDER UTILISED TOOL FOR DIAGNOSING HIDDEN HUNGER IN CROPS.. Results suggest the P removal values in grain used for wheat (3.4 kg/t) and chickpea (3.7 kg/t) are about right... Repeated Starter-Z applications will increase the soil DTPA-Zn levels if the soil levels are likely to be above the suggested critical values ( H 0.8 mg/kg) growers may opt to apply P only at sowing and collect a tissue test for confirmation of not only Zn adequacy, but Cu, Fe, Mn and B also...
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Catalogue: GRDC Updates
Cotton in rotation with winter cereals is common practice with wheat being the favoured rotation crop... Despite this, the majority of cereal crops are achieving low or inconsistent yields and are only partly delivering the rotational benefits and subsequent increase in profitability possible in the system... A planting method comparison was conducted comparing one of the conventional methods of sowing used in the Northern region, which is, spreading seed followed by cultivation with that of a precision disc opener combine planter...
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Catalogue: GRDC Media
Greg said, despite receiving no extra growing season rainfall, the top performers fared better financially and produced crops with higher yields per hectare in good and bad seasons compared to the low performing group... Greg said a 10% increase in fertiliser efficiency could boost profits by $5.05/ha - or about 10% - for the top performers and higher still for average eastern wheatbelt growers... 2. Freight and post farm gate costs Grain freight is high due to the distances involved, but Greg said there was some potential for savings in back-loading...
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Catalogue: GRDC Updates
Relationship between growth stage and accumulated uptake of nitrogen by a wheat crop, expressed as a percentage of the total uptake... Optimising N supply is difficult in western regions given the highly variable seasons. Excessive application of N may increase water use early in the growing season leading to greater water stress during flowering and grain fill, resulting in poor grain set or shrivelled grain... There was no significant effect of N rate on grain yield but the effect on protein was significant with protein increasing with rates of applied N. As for the sowing time trial, there was a negative correlation between grain yield and grain protein concentration, and Gregory did not differ from other varieties...
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Catalogue: GRDC Updates
While pulses have traditionally been viewed as a higher risk crop to grow, with improvements in pulse breeding and with the use of RTK guidance (allowing pulses to be sown in standing stubble), these perceived risks need to be reassessed as they are much lower than what they once were... In the circumstances using fertilisers that have a higher sulphur content, like MES 10 or Airseeder Superfect, can be beneficial... Chickpeas in particular are well suited to be grown on even wider row spacing's of 24-30", as the wider rows allow more plants to access soil moisture in the inter row later in the season and during grain fill...
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Catalogue: GRDC Media
The RCSNs - comprising growers and industry professionals in each port zone - have also invested limited discretionary GRDC funds into 'fast-tracked', short-term projects to address pressing crop production constraints facing local growers... Growers may be interested to know that the GRDC has increased its investment in WA RCSN projects to $750,000 this year... The GRDC looks forward to extending the results from these and other 2014 RCSN projects when they become available...
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Catalogue: GRDC Media
The RCSNs - comprising growers and industry professionals in each port zone - have also invested limited discretionary GRDC funds into 'fast-tracked', short-term projects to address pressing crop production constraints facing local growers... Growers may be interested to know that the GRDC has increased its investment in WA RCSN projects to $750,000 this year... The GRDC looks forward to extending the results from these and other 2014 RCSN projects when they become available...
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Catalogue: GRDC Updates
We have used average prices for each crop: $200/t for sorghum, $250/t for wheat, $400/t for chickpeas and $700/t for mungbeans... At Gindie we produced an extra 600 kg/ha sorghum in 2011/12 and an extra 500 kg/ha chickpeas in 2013, which would return an extra $320/ha for the first 2 crops after application using average crop values... At Wondalli we produced an extra 500 kg/ha sorghum in 2008/09 followed by an extra 650 kg/ha wheat in 2011, which would return an extra $263/ha for the first 2 crops after application using average crop values...
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