Browse on keywords: legume nitrogen Australia
Search results on 09/26/18
3809. Ladd, J., J. Butler, and M. Amato. 1986. Nitrogen fixation by legumes and their role as sources of nitrogen for soil and crop.. Biol. Agr. Hort. 3:269-286.
3816. Ladd, J., J. Oades, and M. Amato. 1981. Distribution and recovery of nitrogen from legume residues decomposing in soils sown to wheat in the field.. Soil Biol. Biochem. 13:251-256.
10079. Cowie, A.L., R.S. Jessop, D.A. MacLeod and G.J. Davis. 1990. Effect of soil nitrate on the growth and nodulation of lupins (Lupinus angustifolius and L. albus).. Austral. J. Expt. Agric. 30:655-659..
The effect of increasing external nitrate concentration on the nodulation of Lupinus albus and L. angustifolius lines was examined in two sand culture experiments. In the first experiment four lines, three L. albus and one L. angustifolius, were grown at nitrate concentrations of 0, 2, 8, 16, and 30 mmol/L for 49 days. Increasing the nitrate concentration reduced nodule weight in all varieties to a similar extent. In a second experiment, 18 L. angustifolius lines were grown at nitrate concentrations of 2 and 8 mmol/L for 49 days. The ratio of nodule weights at the 8 and 2 mmol/L nitrate treatments varied widely, from 23 to 71%, between the lines. There appears to be potential for selection of L. angustifolius varieties able to maintain nitrogen fixation at increased levels of soil N.
10088. Cowie, A.L., R.S. Jessop and D.A. MacLeod. 1990. Effect of soil nitrate on the growth and nodulation of winter crop legumes.. Austral. J. Expt. Agric. 30:651-654..
The relative effect of increasing external nitrate supply on the nodulation of three winter crop legumes was examined in a controlled environment experiment. Lupin, chickpea and field pea were grown at two nitrate concentrations of 2 and 8 mmol/L for 40 days. Shoot and root growth were not affected by nitrate contrations. Increased nitrate concentrations significantly reduced nodule number and nodule weight in all species. The inhibition of nodulation by increased nitrate concentrations was greatest in peas, followed by chickpeas, and least in lupins.
10277. Silsbury, J.H.. 1990. Grain yield of wheat in rotation with pea, vetch, or medic grown with three systems of management.. Austral. J. Expt. Agric. 30:645-649.
Pea, vetch, and medic were grown in South Australia and subjected to plowing as a green manure, seed harvest and residued plowed in, and seed harvest and residues removed. Wheat was then sown over all plots the following year. There were no differences in the wheat yield or protein due to legume species. Plowing in a green manure added about 100 kg N/ha more than removal of seed and residue, while removing seed only added 26 kg N/ha more. Wheat yield was 50% higher after green manure, and 10% higher after seed removal only, than after total removal.