legume residue
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2018 ◽  
Vol 10 (4) ◽  
pp. 1006 ◽  
Author(s):  
Emanoel de Moura ◽  
Stefanny Portela ◽  
Vinicius Macedo ◽  
Virley Sena ◽  
Carlos Sousa ◽  
...  

Soil Research ◽  
2017 ◽  
Vol 55 (6) ◽  
pp. 600 ◽  
Author(s):  
Mark B. Peoples ◽  
Antony D. Swan ◽  
Laura Goward ◽  
John A. Kirkegaard ◽  
James R. Hunt ◽  
...  

Nitrogen (N) contributed by legumes is an important component of N supply to subsequent cereal crops, yet few Australian grain-growers routinely monitor soil mineral N before applying N fertiliser. Soil and crop N data from 16 dryland experiments conducted in eastern Australia from 1989–2016 were examined to explore the possibility of developing simple predictive relationships to assist farmer decision-making. In each experiment, legume crops were harvested for grain or brown-manured (BM, terminated before maturity with herbicide), and wheat, barley or canola were grown. Soil mineral N measured immediately before sowing wheat in the following year was significantly higher (P < 0.05) after 31 of the 33 legume pre-cropping treatments than adjacent non-legume controls. The average improvements in soil mineral N were greater for legume BM (60 ± 16 kg N/ha; n = 5) than grain crops (35 ± 20 kg N/ha; n = 26), but soil N benefits were similar when expressed on the basis of summer fallow rainfall (0.15 ± 0.09 kg N/ha per mm), residual legume shoot dry matter (9 ± 5 kg N/ha per t/ha), or total legume residue N (28 ± 11%). Legume grain crops increased soil mineral N by 18 ± 9 kg N/ha per t/ha grain harvested. Apparent recovery of legume residue N by wheat averaged 30 ± 10% for 20 legume treatments in a subset of eight experiments. Apparent recovery of fertiliser N in the absence of legumes in two of these experiments was 64 ± 16% of the 51–75 kg fertiliser-N/ha supplied. The 25 year dataset provided new insights into the expected availability of soil mineral N after legumes and the relative value of legume N to a following wheat crop, which can guide farmer decisions regarding N fertiliser use.


2015 ◽  
Vol 17 (05) ◽  
pp. 961-968 ◽  
Author(s):  
Mohammad Akmal ◽  
Asad Shah ◽  
Raees Zaman ◽  
Muhammad Afzal ◽  
Noor ul Amin

2012 ◽  
Vol 49 ◽  
pp. 70-77 ◽  
Author(s):  
Md Alamgir ◽  
Ann McNeill ◽  
Caixian Tang ◽  
Petra Marschner

Pedosphere ◽  
2009 ◽  
Vol 19 (1) ◽  
pp. 78-85 ◽  
Author(s):  
I. ABARCHI ◽  
Zhan-Yu ZHANG ◽  
B. VANLAUWE ◽  
Xiang-Ping GUO ◽  
Wei-Mu WANG ◽  
...  

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