Statistical methodologies for drawing causal inference from an unreplicated farmlet experiment conducted by the Cicerone Project

Animal Production Science

Volumn 53, Issue 7-8, 2013, Pages 643-648

  Murison, R ^a   Scott, J M ^a  

^a UNIVERSITY OF NEW ENGLAND   (Australia)

Author keywords

[No Author keywords available]

Indexed keywords

DATA SET; EXPERIMENTAL STUDY; FARMING SYSTEM; FIELD METHOD; GRAZING MANAGEMENT; PASTURE; PROJECT MANAGEMENT; SAMPLING BIAS;

EID: 84884539964     PISSN: 18360939     EISSN: 18365787     Source Type: Journal    
DOI: 10.1071/AN11331     Document Type: Article

References (32)

1. Armstrong RH, Grant SA, Common TG, Beattie MM (1997) Controlled grazing studies on Nardus grassland: effects of between tussock sward height and species of grazer on diet selection and intake. Grass and Forage Science 52, 219-231. doi:10.1111/j.1365-2494.1997.tb02352.x (Pubitemid 28037950)
2. Beier P, Noss RF (1998) Do habitat corridors provide connectivity? Conservation Biology 12, 1241-1252. doi:10.1046/j.1523-1739.1998. 98036.x (Pubitemid 29015008)
3. BeyersDW(1998) Causal inference in environmental impact studies. Journal of the North American Benthological Society 17, 367-373. doi:10.2307/1468339 (Pubitemid 28542215)
4. Chapman DF, McCaskill MR, Quigley PE, Thompson AN, Graham JF, Borg D, Lamb J, Kearney G, Saul GR, Clark SG (2003) Effects of grazing method and fertiliser inputs on the productivity and sustainability of phalaris-based pastures in western Victoria. Australian Journal of Experimental Agriculture 43, 785-798. doi:10.1071/EA02198 (Pubitemid 37261563)
5. Donald GE, Scott JM, Vickery PJ (2013) Satellite derived evidence of whole farmlet and paddock responses to management and climate. Animal Production Science 53, 699-710. doi:10.1071/AN11179
6. Eberhardt LL, Thomas JM (1991) Designing environmental field studies. Ecological Monographs 61, 53-73. doi:10.2307/1942999 (Pubitemid 21905247)
7. Gelman A, Hill J (2007) 'Data analysis using regression and multilevel/hierarchical models.' (Cambridge University Press: New York)
8. Grace PR, Oades JM, Keith H, Hancock TW (1995) Trends in wheat yields and soil organic carbon in the permanent rotation trial at the waite agricultural research institute, South Australia. Australian Journal of Experimental Agriculture 35, 857-864. doi:10.1071/EA9950857 (Pubitemid 26482620)
9. Guevara-Escobar A, Kemp PD, Mackay AD, Hodgson J (2002) Soil properties of a widely spaced, planted poplar (Populus deltoides)-pasture system in a hill environment. Australian Journal of Soil Research 40, 873-886. doi:10.1071/SR01080
10. Hendricksen RE, Ternouth JH, Punter LD (1994) Seasonal nutrient intake and phosphorus kinetics of grazing steers in northern Australia. Australian Journal of Agricultural Research 45, 1817-1829. doi:10.1071/AR9941817 (Pubitemid 2161437)
11. Holland PW (1986) Statistics and causal inference. Journal of the American Statistical Association 81, 945-960.
12. Jones RM, Bunch GA (1995) Long-term records of legume persistence and animal production from pastures based on Safari Kenya clover and Leucaena in subtropical coastal Queensland. Tropical Grasslands 29, 74-80.
13. Kaine G, Doyle B, Sutherland H, Scott JM (2013) Surveying the management practices and research needs of graziers in the New England region of New South Wales. Animal Production Science 53, 602-609. doi:10. 1071/AN11170
14. LambertMG, Clark DA, Grant DA, Costall DA, FletcherRH(1983) Influence of fertiliser and grazing management on North Island moist hill country. 1. Herbage accumulation. New Zealand Journal of Agricultural Research 26, 95-108. doi:10.1080/00288233.1983.10420958
15. Ledgard SF, Sprosen MS, Brier GJ, Nemaia EKK, Clark DA(1996) Nitrogen inputs and losses fromNewZealand dairy farmlets, as affected by nitrogen fertilizer application: year one. Plant and Soil 181, 65-69. doi:10.1007/BF00011293 (Pubitemid 26324910)
16. Liang KY, Zeger SL (1986) Longitudinal data analysis using generalized linear models. Biometrika 73, 13-22. doi:10.1093/biomet/73.1.13
17. Machado S, Petrie SE (2006) Symposium - Analysis of unreplicated experiments - Introduction. Crop Science 46, 2474-2475. doi:10.2135/cropsci2006. 05.0321 (Pubitemid 44950597)
18. Morley FHW, Spedding CRW (1968) Agricultural systems and grazing experiments. Herbage Abstracts 38, 279-287.
19. Murtagh G (1975) The need for alternative techniques of productivity assessment in grazing experiments. Tropical Grasslands 9, 151-158.
20. Oksanen L (2001) Logic of experiments in ecology: is pseudoreplication a pseudoissue? Oikos 94, 27-38. doi:10.1034/j.1600-0706.2001.11311.x (Pubitemid 32773698)
21. Owens MK, Mackley JW, Carroll CJ (2002) Vegetation dynamics following seasonal fires in mixed mesquite/acacia savannas. Journal of Range Management 55, 509-516. doi:10.2307/4003231
22. Pagnotta MA, Snaydon RW, Cocks PS (1997) The effects of environmental factors on components and attributes of a Mediterranean grassland. Journal of Applied Ecology 34, 29-42. doi:10.2307/2404845
23. Rubin DB, Waterman RP (2006) Estimating the causal effects of marketing interventions using propensity score methodology. Statistical Science 21, 206-222. doi:10.1214/088342306000000259 (Pubitemid 44367638)
24. Scott JM, Gaden CA, Edwards C, Paull DR, Marchant R, Hoad J, Sutherland H, Coventry T, Dutton P (2013a) Selection of experimental treatments, methods used and evolution of management guidelines for comparing and measuring three grazed farmlet systems. Animal Production Science 53, 628-642. doi:10.1071/AN12265
25. Scott JM, Munro M, Rollings N, Browne W, Vickery PJ, Macgregor C, Donald GE, Sutherland H (2013b) Planning for whole-farm systems research at a credible scale: subdividing land into farmlets with equivalent initial conditions. Animal Production Science 53, 618-627.doi:10.1071/AN11176
26. Shakhane LM, Scott JM, Murison R, Mulcahy C, Hinch GN, Morrow A, Mackay DF (2013) Changes in botanical composition on three farmlets subjected to different pasture and grazing management strategies. Animal Production Science 53, 670-684. doi:10.1071/AN11177
27. Spedding CRW, Brockington NR (1976) Guest editorial: the study of ecosystems. Agro-ecosystems 2, 165-172. doi:10.1016/0304-3746(76) 90158-X
28. Tanaka DL, Karn JF, Scholljegerdes EJ (2008) Integrated crop/livestock systems research: practical research considerations. Renewable Agriculture and Food Systems 23, 80-86. doi:10.1017/S17421705070 02165 (Pubitemid 351330686)
29. Thomson EF, Bahhady FA, Nordblom TL, Harris HC (1995) A model-farm approach to research on crop livestock integration. 3. Benefits of crop livestock integration and a critique of the approach. Agricultural Systems 49, 31-44. doi:10.1016/0308-521X(95)91632-9 (Pubitemid 26431122)
30. Tothill JC, Hargreaves JNG, JonesRM(1978) BOTANAL: a comprehensive sampling and computing procedure for estimating pasture yield and composition. I. Field sampling. CSIRO Division of Tropical Crops and Pastures, Brisbane.
31. Zuur AF, Ieno EN, SmithGM(2007) 'Analysing ecological data.' (Springer: New York)
32. Zuur AF, Ieno EN, Walker N, Saveliev AA, SmithGM(2009) 'Mixed effects models and extensions in ecology with R.' (Springer-Verlag: New York)