
TY  - JOUR
A1  - Evans, J 
A1  - Fettell, NA 
A1  - Coventry, DR 
A1  - O'Connor, GE 
A1  - Walsgott, DN 
A1  - Mahoney, J 
A1  - Armstrong, EL 
T1  - Wheat response after temperate crop legumes in south-eastern Australia
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1991
VL  - 42
IS  - 1
SP  - 31
EP  - 43
KW  - 
UR  - https://doi.org/10.1071/AR9910031 
N2  - At 15 sites in the cereal belt of New South Wales and Victoria, wheat after lupin or pea produced more biomass and had a greater nitrogen (N) content than wheat after wheat or barley; on average these crops assimilated 36 kg N/ha more. The improved wheat yield after lupin averaged 0 . 9 t/ha and after pea 0.7 t/ha, increases of 44 and 32% respectively. The responses were variable with site, year and legume. Soil available N was increased by both lupin and pea and the levels of surface inorganic N measured at the maturity of first year crops was often related to N in wheat grown in the following year. Of two possible sources of additional N for wheat after legumes, namely mineral N conserved in soil by lupin or pea (up to 60 kg N/ha) and the total N added in the residues of these legumes (up to 152 kg N/ha), both were considered significant to the growth of a following wheat crop. Their relative contribution to explaining variance in wheat N is analysed, and it is suggested wheat may acquire up to 40 kg N/ha from legume stubbles. Non-legume break crops also increased subsequent wheat yield but this effect was not as great as the combined effect of added N and disease break attained with crop legumes. 
ER  -

