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You are here: Home > Journals > AN > EA07170
RESEARCH ARTICLE
Contents Vol 49(8)

Pasture–crop rotations for sustainable production in a wheat and sheep-based farming system on a Vertosol in south-west Queensland, Australia

G. A. Thomas A D , R. C. Dalal B , E. J. Weston C , K. J. Lehane C , A. J. King A , D. N. Orange A , C. J. Holmes A and G. B. Wildermuth C
+ Author Affiliations
- Author Affiliations

A Queensland Department of Environment and Resource Management, South West Region, Toowoomba, Qld 4350, Australia.

B Queensland Department of Environment and Resource Management, Indooroopilly, Qld 4068, Australia.

C Queensland Department of Employment, Economic Development and Innovation, Toowoomba, Qld 4350, Australia.

D Corresponding author. Present address: 2 McCallum Court, Toowoomba, Qld 4350, Australia. Email: gandmthomas@bigpond.com

Animal Production Science 49(8) 682-695 https://doi.org/10.1071/EA07170
Submitted: 6 June 2007  Accepted: 11 May 2009   Published: 27 July 2009

Abstract

Rainfed grain production, based on winter cereals, is marginal in south-west Queensland, Australia, because of low and variable rainfall and high evapotranspiration. Also, grain yield and grain quality have decreased as soil fertility, particularly soil nitrogen supply, has declined on older cropping lands. An option for improving soil N supply is to include legume-based pastures in rotation with winter cereals. The objective of this study was to determine the effects of short-term (18 months) legume pastures (annual medics and lucerne + annual medics), and longer term (3 years) mixed grass (Bambatsi panic) and legume (lucerne + annual medics) pasture phases on sheep production and on soil water and N supply and production of subsequent wheat crops on a grey Vertosol soil.

Two separate phases of annual medics and lucerne + annual medics pastures produced mean total aboveground dry matter yield of 7.10 t/ha of annual medics and 5.80 t/ha of lucerne + annual medics over the 18-month periods. For two phases of the grass + legume pastures, mean total aboveground dry matter yield was 3.95 t/ha for grass and 8.19 t/ha for legume over 3 years. Over an 18-month period, sheep bodyweight gains and fleece weights were similar for the annual medics, lucerne + annual medics and grass + legume pastures and were approximately five times greater than those from native pasture as a result of the greater stocking rate possible on the sown pastures.

Greater drying of the soil profile occurred following lucerne + annual medics and grass + legume pasture phases than continuous wheat, resulting in lower soil water content at sowing of wheat crops following these pasture phases on several occasions. Mean soil nitrate-N benefits before wheat sowing in the first year following termination of the 18-month annual medics, lucerne + annual medics, and the 3-year grass + legume pasture phases were 45, 44 and 42 kg N/ha, respectively. Grain N yields and gross margins of the first wheat crops following the 18-month annual medics, lucerne + annual medics, and the 3-year grass + legume pasture phases were similar in value to continuous wheat with ~60, 80, and 40–60 kg N/ha fertiliser applied at sowing, respectively. Improvements in grain N yield and gross margin were still evident in the fifth wheat crop following annual medics and lucerne + annual medics pastures and in the third wheat crop following grass + legume pasture, compared with continuous wheat without N fertiliser addition.

Total gross margins from 1996 to 2005 were 1.6–2.5 times greater for the pasture–crop rotations than continuous wheat where no N fertiliser was applied to wheat. However, gross margins were greater in continuous wheat than in pasture–crop rotations where N fertiliser was applied to target prime hard grade grain protein in wheat.

The 3-year grass + legume pasture phase showed potential to improve surface soil structure and water infiltration and to reduce decline in soil organic carbon concentration at 0–0.1 m depth, compared with continuous wheat cropping and shorter-term legume pasture phases.


Acknowledgements

The authors thank the Grains Research and Development Corporation (GRDC) for financial assistance and Mr and Mrs D. Hill, ‘Dunkerry South’, Nindigully, who provided land and other assistance for the trial. We gratefully acknowledge the involvement and advice of members of the field trial management committee. We also thank: Dr J. Standley, Mr J. Hagedoorn, Mr K. Spann, Mrs J. Glasby and Mrs A. Pumfrey for soil and plant chemical analyses; Mr R.B. McNamara, Mr G. McNamara, Ms J. Riddell and Ms M. Fraser for technical assistance; Messrs, J. Henderson, G. Pauli, G. Kedzlie, D. Cooper, R. Norris, D. Baills, M. Weston and P. Marsh for field operations; Mrs A. Kelly and Ms K. Bell for advice on trial design and statistical analysis; and Dr D.K. Singh and Mr G. W. Titmarsh for comments on drafts of the manuscript.


References


Australian Bureau of Statistics (2001) Queensland Year Book 2001. No. 58. ABS Catalogue No. 1301.3.

Best EK (1976) An automated method for determining nitrate nitrogen in soil extracts. Queensland Journal of Agricultural and Animal Sciences 33, 161–166.
|  CAS |
[Verified 29 January 2008]

Crooke WM, Simpson WE (1971) Determination of ammonium in Kjeldahl digests of crops by an automated procedure. Journal of the Science of Food and Agriculture 22, 9–10.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Dalal RC, Mayer RJ (1986a) Long-term trends in fertility of soils under continuous cultivation and cereal cropping in southern Queensland. I. Overall changes in soil properties and trends in winter cereal yields. Australian Journal of Soil Research 24, 265–279.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Dalal RC, Mayer RJ (1986b) Long-term trends in fertility of soils under continuous cultivation and cereal cropping in southern Queensland. V. Rate of loss of total nitrogen from the soil profile and changes in carbon : nitrogen ratios. Australian Journal of Soil Research 24, 493–504.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Dalal RC, Strong WM, Weston EJ, Gaffney J (1991) Sustaining multiple production systems. 2. Soil fertility decline and restoration of cropping lands in sub-tropical Queensland. Tropical Grasslands 25, 173–180. open url image1

Dalal RC, Strong WM, Weston EJ, Cooper JE, Thomas GA (1997) Prediction of grain protein in wheat and barley in a subtropical environment from available water and nitrogen in Vertisols at sowing. Australian Journal of Experimental Agriculture 37, 351–357.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Dalal RC, Strong WM, Weston EJ, Cooper JE, Wildermuth GB, Lehane KJ, King AJ, Holmes CJ (1998) Sustaining productivity of a Vertisol at Warra, Queensland, with fertilisers, no-tillage or legumes. 5. Wheat yields, nitrogen benefits and water-use efficiency of chickpea–wheat rotation. Australian Journal of Experimental Agriculture 38, 489–501.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Dalal RC, Weston EJ, Strong WM, Lehane KJ, Cooper JE, King AJ, Holmes CJ (2004a) Sustaining productivity of a Vertisol at Warra, Queensland, with fertilisers, no-tillage or legumes. 7. Yield, nitrogen and disease-break benefits from lucerne in a two-year lucerne–wheat rotation. Australian Journal of Experimental Agriculture 44, 607–616.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Dalal RC, Weston EJ, Strong WM, Lehane KJ, Cooper JE, King AJ, Holmes CJ (2004b) Sustaining productivity of a Vertisol at Warra, Queensland, with fertilisers, no-tillage or legumes. 8. Effect of duration of lucerne ley on soil nitrogen and water, wheat yield and protein. Australian Journal of Experimental Agriculture 44, 1013–1024.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Department of Primary Industries (2000) ‘Winter crop management notes.’ (Kingswood Press: Underwood, Qld)

Doughton JA , Holford ICR (1997) Legumes. In ‘Sustainable crop production in the sub-tropics: an Australian perspective’. (Eds AL Clarke, PB Wylie) pp. 235–257. Queensland Department of Primary Industries Information Series QI97035.

Freebairn DM, Loch RJ, Cogle AL (1993) Tillage methods and soil and water conservation in Australia. Soil & Tillage Research 27, 303–325.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Gardner EA (1985) Soil water. In ‘Identification of soils and interpretation of soil data’. (Ed. GE Rayment) pp. 197–234. (Australian Society of Soil Science Incorporated, Queensland Branch: Brisbane)

Holford ICR, Schweitzer BE, Crocker GJ (1998) Comparative effects of subterranean clover, medic, lucerne, and chickpea in wheat rotations, on nitrogen, organic carbon, and moisture in two contrasting soils. Australian Journal of Soil Research 36, 57–72.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Hossain SA, Dalal RC, Waring SA, Strong WM, Weston EJ (1996a) Comparison of legume-based cropping systems at Warra, Queensland. I. Soil nitrogen and organic carbon accretion and potentially mineralisable nitrogen. Australian Journal of Soil Research 34, 273–287.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Hossain SA, Strong WM, Waring SA, Dalal RC, Weston EJ (1996b) Comparison of legume-based cropping systems at Warra, Queensland. II. Mineral nitrogen accumulation and availability to subsequent wheat crop. Australian Journal of Soil Research 34, 289–297.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Isbell RF (1996) ‘The Australian soil classification . Australian soil and land survey handbook series. Vol. 4.’ (CSIRO Publishing: Melbourne)

Lloyd DL , Hilder TB (1978) Growth of lucerne in relation to soil water. In ‘Queensland Wheat Research Institute biennial report 1976–1978’. p. 41. (Queensland Department of Primary Industries: Toowoomba)

Peoples MB, Baldock JA (2001) Nitrogen dynamics of pastures: nitrogen fixation inputs, the impact of legumes on soil nitrogen fertility, and the contributions of fixed nitrogen to Australian farming systems. Australian Journal of Experimental Agriculture 41, 327–346.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Perroux KM, White I (1988) Designs for disc permeameters. Soil Science Society of America Journal 52, 1205–1215. open url image1

Reynolds WD, Elrick DE (1991) Determination of hydraulic conductivity using a tension infiltrometer. Soil Science Society of America Journal 55, 633–639. open url image1

Robinson JB (2005) Understanding and applying decision support systems in farming systems research in Australia. PhD Thesis, University of Western Sydney.

Sims JR, Haby VA (1971) Simplified colorimetric determination of soil organic matter. Soil Science 112, 137–141.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Snedecor GW , Cochran WG (1967) ‘Statistical methods.’ 6th edn. (Iowa State University Press: Ames, IA)

Strong WM, Dalal RC, Weston EJ, Cooper JE, Lehane KJ, King AJ, Chicken CJ (1996) Sustaining productivity of a Vertisol at Warra, Queensland, with fertilisers, no-tillage or legumes. 2. Long-term fertiliser nitrogen needs to enhance wheat yields and grain protein. Australian Journal of Experimental Agriculture 36, 665–674.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Strong WM, Dalal RC, Weston EJ, Lehane KJ, Cooper JE, King AJ, Holmes CJ (2006) Sustaining productivity of a Vertisol at Warra, Queensland, with fertilisers, no-tillage or legumes. 9. Production and nitrogen benefits from mixed grass and legume pastures in rotation with wheat. Australian Journal of Experimental Agriculture 46, 375–385.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Thomas GA , Felton WL , Radford BJ (1997) Tillage and crop residue management. In ‘Sustainable crop production in the sub-tropics: an Australian perspective’. (Eds AL Clarke, PB Wylie) pp. 195–213. Queensland Department of Primary Industries Information Series QI97035.

Thomas GA, Dalal RC, Weston EJ, Holmes CJ, King AJ, Orange DN, Lehane KJ (2007) Zero tillage and nitrogen fertiliser application in wheat and barley on a Vertosol in a marginal cropping area of south-west Queensland. Australian Journal of Experimental Agriculture 47, 965–975.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Walkley A (1947) A critical examination of a rapid method for determining organic carbon in soils – effect of variations in digestion conditions and of inorganic soil constituents. Soil Science 63, 251–264.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Walkley A, Black IA (1934) An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science 37, 29–38.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Weston EJ , Nason CN , Armstrong RDH (1975) Resources study and problem analysis for primary industries in the Condamine-Maranoa Basin of southern Queensland. Queensland Department of Primary Industries, Division of Plant Industry Bulletin No. 731.

Weston EJ, Doughton JA, Dalal RC, Strong WM, Thomas GA, Lehane KJ, Cooper JE, King AJ, Holmes CJ (2000) Managing long-term fertility of cropping lands with ley pastures in southern Queensland. Tropical Grasslands 34, 169–176. open url image1

Weston EJ, Dalal RC, Strong WM, Lehane KJ, Cooper JE, King AJ, Holmes CJ (2002) Sustaining productivity of a Vertisol at Warra, Queensland, with fertilisers, no-tillage or legumes. 6. Production and nitrogen benefits from annual medic in rotation with wheat. Australian Journal of Experimental Agriculture 42, 961–969.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Wildermuth GB, Tinline AD, McNamara RB (1992) Assessment of yield loss caused by common root rot in wheat cultivars in Queensland. Australian Journal of Agricultural Research 43, 43–58.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Wildermuth GB , Thompson JP , Robertson LN (1997) Biological changes: diseases, insects and beneficial organisms. In ‘Sustainable crop production in the sub-tropics: an Australian perspective’. (Eds AL Clarke, PB Wylie) pp. 112–130. Queensland Department of Primary Industries Information Series QI97035.