Balancing legume N with fertiliser inputs can be tricky. Legumes can affect soil N dynamics in unexpected ways. For example, chickpeas grown in low N soil can fix a large amount of N. But in high N soils, chickpeas use the soil N and fix less from the atmosphere. They […]
The yields of ‘break crops’ are more important to farm incomes with higher prices for some non-cereal crops. In 2017, 22.5 million hectares were sown to winter crops. Over 20% – 4.7 million ha – were non-cereals. In the period leading up until 2011, break crops were around 14% of […]
Legumes grown under ideal conditions can add 30 to 120 kilograms of nitrogen per hectare, per year, back into the soil for use by other crops. The benefit of legume rotations to the following crops comes when the nitrogen-rich legume residue has decomposed and released nitrogen into the soil. Wheat […]
The current temptingly high chickpea prices make them an attractive option. In paddocks with high soil nitrate (>100kg N/ha) chickpeas may not yield as well as expected, or deliver the usual legume break crop advantage of a net benefit to the paddock’s nitrogen (N) balance.
Paddocks can have high starting soil […]
Rain received in late August in the northern grains region will help winter crops finish in NSW, but more is needed in September to make a great finish. Growers who have already top dressed should be happy, however the window is closing fast for growers to boost yield with extra nitrogen. […]
Mark Peoples from CSIRO talks about recent research, funded by GRDC, into the value of legume rotations for adding nitrogen (N) to cropping soils, and explains some rules of thumb for growers in the southern region.
The work looked at two kinds of legume rotation:
pulse crops where the grain is harvested
How much N does a legume crop give a following cereal crop?
A review looked at the $ value of Nitrogen (N) fixed by legume crops (chickpeas or lupins) to a following cereal crop around Australia. This work will be presented at the Agronomy Conference in September 2015 in Hobart.
The value […]
Mike Bell from the University of Queensland and QAAFI talks about the role of legumes in reducing nitrogen fertliser inputs and reducing the risk of nitrogen losses. The video was taken at the National Soils Conference held in Melbourne in November 2014.
For more information:
Denitrification the latest chapter in the N […]