- Authors:
- Christie, K. M.
- Rawnsley, R. P.
- Eckard, R. J.
- Source: Animal Feed Science and Technology
- Volume: 166-167
- Year: 2011
- Authors:
- Cullen, B. R.
- Eckard, R. J.
- Source: Animal Feed Science and Technology
- Volume: 166-167
- Year: 2011
- Authors:
- Eckard, R. J.
- Cullen, B. R.
- Source: Animal Feed Science and Technology
- Volume: 166-167
- Year: 2011
- Authors:
- Grace, P.
- Barton, L.
- Chen, D.
- Eckard, R.
- Kelly, K.
- Officer, S.
- Scheer, C.
- Schwenke, G.
- Wang, W.
- Source: Soil Solutions for a Changing World
- Year: 2011
- Authors:
- Huggins, T.
- Kelly, K.
- Suter, H.
- Eckard, R.
- Source: The CCRSPI Conference
- Year: 2011
- Authors:
- Van Zwieten, L.
- Kimber, S.
- Rowlings, D. W.
- Grace, P. R.
- Scheer, C.
- Source: Plant and Soil
- Volume: 345
- Issue: 1-2
- Year: 2011
- Summary: We assessed the effect of biochar incorporation into the soil on the soil-atmosphere exchange of the greenhouse gases (GHG) from an intensive subtropical pasture. For this, we measured N2O, CH4 and CO2 emissions with high temporal resolution from April to June 2009 in an existing factorial experiment where cattle feedlot biochar had been applied at 10 t ha−1 in November 2006. Over the whole measurement period, significant emissions of N2O and CO2 were observed, whereas a net uptake of CH4 was measured. N2O emissions were found to be highly episodic with one major emission pulse (up to 502 μg N2O-N m−2 h−1) following heavy rainfall. There was no significant difference in the net flux of GHGs from the biochar amended vs. the control plots. Our results demonstrate that intensively managed subtropical pastures on ferrosols in northern New South Wales of Australia can be a significant source of GHG. Our hypothesis that the application of biochar would lead to a reduction in emissions of GHG from soils was not supported in this field assessment. Additional studies with longer observation periods are needed to clarify the long term effect of biochar amendment on soil microbial processes and the emission of GHGs under field conditions.
- Authors:
- Chen, D.
- Walker, C.
- Pengthamkeerati, P.
- Suter, H. C.
- Source: Soil Research
- Volume: 49
- Issue: 4
- Year: 2011
- Authors:
- Chen, D.
- Mahoney, M.
- Davies, R.
- Sultana, H.
- Suter, H.
- Source: The CCRSPI Conference
- Year: 2011
- Authors:
- Alletto, L.
- Coquet, Y.
- Justes, E.
- Source: Agricultural Water Management
- Volume: 102
- Issue: 1
- Year: 2011
- Summary: Effects of two tillage treatments and two fallow period managements under continuous maize cropping on soil temperature, soil water dynamics and maize development were evaluated over a 4-year period (2005–2008). Tillage treatments were conventional tillage with mouldboard ploughing and conservation tillage with disk harrowing. The fallow period managements were bare soil or soil sown with a cover crop after maize harvest. For each year, topsoil temperature (0–20 cm-depth) was lower under conservation tillage systems at sowing, from 0.8 to 2.8 °C. This difference persisted several weeks after sowing, and disappeared afterwards. Under conservation tillage, higher soil water content was generally measured at sowing and during the growing season strong fluctuations were observed at 40 cm-depth. Under conventional tillage, soil water content varied mainly in the tilled layer (20 cm-depth). Tillage and fallow period management affected water flow rate at 40 cm-depth. During the maize growing season, the lowest drainage volumes were measured in 2006 and 2008 under conservation tillage in cover cropped plots. No effect of fallow period management on maize development and yield was observed but significantly higher yields were measured under conservation tillage in 2005 and 2007. From this 4-year experiment under continuous maize cropping, using cover crop and reducing tillage intensity enhanced water use efficiency while maintaining or increasing maize yields.
- Authors:
- Source: Biomass and Bioenergy
- Volume: 35
- Issue: 5
- Year: 2011
