School of Agriculture and Food Sustainability

Dr David Lloyd

Honorary Research Fellow
School of Agriculture and Food Sustainability

Publications

Books (5)
Book Chapters (2)
Journal Articles (64)
Conference Papers (32)
Thesis (1)
Department Technical Reports (8)

Books

Lloyd, D.L., Johnson, B., O’Brien, S.M., Roesner, L., Boschma, S.P. and Williams, R.W. (2007). LeyGrain™: Pastures in farming systems. Sustaining profit and the environment. Toowoomba, QLD, Australia: DPI&F Queensland and NSW DPI.
Lloyd, D.L., O’Brien, Sue, Johnson, Brian, Pengelly, Bruce and Wurst, Micha (2006). Pasture Legumes for Subtropical Grain and Pastoral Systems; The Ute guide. Adelaide, SA Australia: Primary Industries and Resources South Australia.
Lloyd, D. L., English, M., Williams, R., McDonald, W. and Auricht, G. (2002). Lucerne Pests & Disorders: The Ute Guide.. Brisbane, QLD Australia: GRDC.
Bullen, K.S., Franzmann, B.A., Harris, G.A., Irwin, J.A.G., Lloyd, D.L., Lowe, K.F., Mills, W.D., Ryley, M.J. and Thompson, P.J.M. (2002). The Lucerne Management Handbook. 4th ed. Brisbane, QLD Australia: Department of Primary Industries.
Gramshaw, D. and Lloyd, D.L. (1993). Grazing the north - creating wealth and sustaining the land. Brisbane, QLD, Australia: Queensland Department of Primary Industries.

Book Chapters

Lloyd, D.L. (1984). Development of aphid and disease resistant lucerne cultivars and lucerne seed production. International Course in Tropical Pasture and Fodder Seed Production 1984 : course manual. (pp. 1-1) Brisbane, QLD Australia: QDPI.
Thompson, J. P., Lloyd, D. L. and Moore, A. W. (1976). Pattern analysis of nitrogen mineralisation potentials in soil from a ley pasture crop rotation experiment. Pattern analysis in agricultural science. (pp. 249-258) edited by W. T. Williams. Melbourne, VIC, Australia: CSIRO Publishing.

Journal Articles

Lloyd, David L., Thompson, John P., Young, Rick R., Boschma, Suzanne P. and O’Neil, Mark (2025). Variation in leaf morphology and agronomic attributes of a naturalized population of Medicago polymorpha L. (Burr Medic) from New South Wales, Australia, and relationships with climate and soil characteristics.. Agronomy, 15 (7) 1737, 1737-7. doi: 10.3390/agronomy15071737
Lloyd, David L., Thompson, John P., Boschma, Suzanne P., Young, Rick R., Johnson, Brian and Teasdale, Kemp C. (2025). Phenotypic and agronomic variation within naturalized Medicago polymorpha L. (Burr Medic) in subtropical Queensland, Australia, and relationships with climate and soil characteristics. Agronomy, 15 (1) 139, 1-25. doi: 10.3390/agronomy15010139
Cook, Bruce G., Lloyd, David L., Scattini, Walter J. and Robertson, Alan D. (2024). Paspalum lepton - a valuable adjunct to the suite of grasses used in grazing systems in the subtropics or a potential weed. Tropical Grasslands - Forrajes Tropicales, 12 (3), 124-141. doi: 10.17138/tgft(12)124-141
Lloyd, David and George, David (2022). A rangelands conundrum – the division within and among producers and stakeholders regarding climate change: Addressing the challenge to promote and gain consensus of perception. Proceedings of the Royal Society of Queensland, 131, 71-85. doi: 10.53060/prsq.2022-05
Lloyd, D. L. and George, D. A. (2022). Leadership and climate change. Where to from here?  . The Ag Professional, 88-94.
Lloyd, D. L. (2021). A productive journey – sown pastures for southern inland Queensland: 2. Key contributions. Agricultural Science, 44-50. doi: 10.3316/informit.368610402837288
Lloyd, D. L. (2021). A Productive Journey – Sown Pastures for Southern Inland Queensland: 1. A Context. The Ag Professional, 37-43.
Lloyd, David L., George, David A. and Clewett, Jeff F. (2020). Climate change adaptation, risk management and education to meet needs in rangelands. Proceedings of the Royal Society of Queensland, 127, 51-55. doi: 10.5962/p.357861
George, David A., Clewett, Jeff Frank, Lloyd, David, McKellar, Richard, Tan, Poh-Ling, Howden, Mark, Rickards, Lauren, Ugalde, David and Barlow, Snow (2019). Research priorities and best practices for managing climate risk and climate change adaptation in Australian agriculture. Australasian Journal of Environmental Management, 26 (1), 6-24. doi: 10.1080/14486563.2018.1506948
Lloyd, David (2018). John Kenneth Leslie AO - Influential, visionary research leader. Agricultural Science, 29/30 (2/1), 37-43.
Lloyd, D.L. and George, D.A. (2016). Thoughts on accelerating innovation and adoption in Australian agriculture. Agricultural Science Journal, 28 (1), 26-29.
Lloyd, D. L., Johnson, B., O'Brien, S. M. and Lawrence, D. N. (2009). Action learning in partnership with Landcare and catchment management groups to support increased pasture sowings in southern inland Queensland. Animal Production Science, 49 (10), 907-915. doi: 10.1071/ea08298
Lawrence, David, Bell, Mike, Johnson, Brian and Lloyd, David (2009). Integrating pastures into farming systems - soil health and the benefits to crops. Tropical Grasslands, 43, 212-216.
Howie, J. and Lloyd, D.L. (2009). Hybrid disc medic (Medicago tornata x Medicago littoralis). Pastures Australia Factsheet.
Johnson, B. and Lloyd, D.L. (2008). Cluster clover (Trifolium glomeratum). Pastures Australia Factsheet.
Johnson, B. and Lloyd, D.L. (2008). Snail medic (Medicago scutellata).. Pastures Australia Factsheet.
Lloyd, D.L. and Johnson, B. (2008). Lucerne (Medicago sativa). Pastures Australia Factsheet.
Johnson, B. and Lloyd, D.L. (2008). Panics (Panicum maximum var. trichoglume (green panic), Panicum maximum (Gatton panic)). Pastures Australia Factsheet.
Howie, J. and Lloyd, D.L. (2008). Barrel medic (Medicago truncatula). Pastures Australia Factsheet.
Johnson, B. and Lloyd, D.L. (2008). Button medic (Medicago orbicularis). Pastures Australia Factsheet.
Johnson, B. and Lloyd, D.L. (2008). Round-leaf cassia (Chamaecrista rotundifolia). Pastures Australia: Fact Sheet.
Nichols, P. G. H., Loi, A., Nutt, B. J., Evans, P. M., Craig, A. D., Pengelly, B. C., Lloyd, D. L., Revell, C. K., Nair, R. M., Ewing, M. A., Hwieson, J. G., Auricht, G. A., Howie, J. H., Sandral, G. A., Carr, S. J., de Koning, C. T., Hackney, G. J., Snowball, R., Hughes, S. J., Hall, E. J., Foster, K. J., Skinner, P. W., Barbetti, M. J. and You, M. P. (2007). New annual and short-lived perennial pasture legumes for Australian agriculture - 15 years of revolution. Field Crops Research, 107, 10-23.
Nichols, P. G. H., Barbetti, M. J., Sandral, G. A., Dear, B. S., de Koning, C. T., Lloyd, D. L., Evans, P. M., Craig, A. D., Si, P. and You, M. P. (2007). Coolamon subterranean clover (Trifolium subterraneum L. var. subterraneum). Australian Journal of Experimental Agriculture, 47, 223-225.
Nichols, P. G. H., Sandral, G. A., Dear, B. S., de Koning, C. T., Lloyd, D. L., Evans, P. M., Craig, A. D., Nutt, B. J., Barbetti, M. J., Si, P. and You, M. P. (2007). Izmir subterranean clover (Trifolium subterraneum L. var. subterraneum). Australian Journal of Experimental Agriculture, 47 (2), 226-229. doi: 10.1071/ea05283
Lloyd, David, Johnson, Brian and O'Brien, Sue (2007). Sown pasture grasses and legumes for marginal cropping lands in southern inland Queensland. Tropical Grasslands, 41, 164-173.
Lloyd, D.L. (2007). Digit grass (Digitaria eriantha (previously Digitaria smutzii)). Pastures Australia Factsheet.
Lloyd, D.L. (2007). Bambatsi panic (Panicum coloratum; Panicum coloratum var. makarikariense). Pastures Australia Factsheet.
Howie, J., Lloyd, D.L. and Revell. C. (2007). Spineless burr medic (Medicago polymorpha var. brevispina). Pastures Australia Factsheet.
Nichols, P. G. H., Barbetti, M. J., Sandral, G. A., Dear, B. S., de Koning, C. T., Lloyd, D. L., Evans, P. M., Craig, A. D., Si, P. and You, M. P. (2006). Urana subterranean clover (Trifolium subterraneum L. var. subterraneum). Australian Journal of Experimental Agriculture, 46, 1105-1107.
Ryley, M. J., Lloyd, D. L., Teasdale, K. C. and Mackie, J. M. (2004). Rhizoctonia crown and root rot of the pasture legume, sulla (Hedysarum coronarium). Australasian Plant Pathology, 33 (2), 183-188. doi: 10.1071/AP03093
Bell, L. W., Lloyd, D. L., Bell, K. L., Johnson, B. and Teasdale, K. C. (2003). First year seed softening in three Hedysarum spp. in southern Queensland. Australian Journal of Experimental Agriculture, 43 (11), 1303-1310. doi: 10.1071/EA02195
Mackie, J. M., Lloyd, D. L., Ryley, M. J. and Irwin, J. A. G. (1999). Fungal diseases of temperate annual pasture legumes in southern Queensland. Australian Journal of Experimental Agriculture, 39 (6), 699-707. doi: 10.1071/EA99012
Lloyd, D.L., Taylor, G.B., Johnson, B. and Teasdale, K.C. (1997). Patterns of seed softening and seedling emergence of nineteen annual medics during three years after a single seed crop in southern Queensland. Australian Journal of Experimental Agriculture, 37, 767-778. doi: 10.1071/EA97060
Lloyd, D.L., Young, R.R., Teasdale, K.C., O’Neill, M. and Johnson, B. (1996). Naturalised burr medic in the northern grain belt of Australia. Tropical Grasslands, 30, 151.
Nichols, P.G.H., Nicholas, D.A., Dear, B.S., Clark, S.G., Reed, K.F.M., de Koning, C.T., Bellotti, W. and Lloyd, D.L. (1995). Trifolium subterraneum L. var. subterraneum (Katz. Et Morley) Zohary and Heller (subterranean clover) cv. York. Australian Journal of Experimental Agriculture, 35, 821-822. doi: 10.1071/EA9950821
Gramshaw, D., Lowe, K.F. and Lloyd, D.L. (1993). Effect of cutting interval and winter dormancy on yield, persistence, nitrogen concentration, and root reserves of irrigated lucerne in the Queensland subtropics.. Australian Journal of Experimental Agriculture, 33, 847-954. doi: 10.1071/EA9930847
Clarkson, N.M., Mears, P.T., Lowe, K.F. and Lloyd, D.L. (1991). Persistence and productivity of temperate legumes with tropical grasses. Tropical Grasslands, 25, 129-136.
Johnson, B. and Lloyd, D.L. (1991). Madeira serradella - a winter legume for sandy soils on the Darling Downs.. Tropical Grasslands, 25, 231-232.
Lloyd, D.L., Smith, K.P., Clarkson, N.M., Weston, E.J. and Johnson, B. (1991). Ley pastures in the subtropics. Tropical Grasslands, 25, 181-188.
Gladstones, J.S., Bolland, M.D.A. and Lloyd, D.L. (1989). Serradella (a) Ornithopus compressus L. (yellow serradella) cv. Madeira.. Australian Journal of Experimental Agriculture, 29, 304-305.
Lloyd, D.L. and Johnson, B. (1988). An old pasture legume with new horizons - Serradella for acid, sandy soils. Queensland Agricultural Journal, 114, 79-82.
Gramshaw, D., Langdon, P.W., Lowe, K.F. and Lloyd, D.L. (1985). Performance of North American and Australian lucernes in the Queensland subtropics. 1. Field reaction to important root and crown diseases.. Australian Journal of Experimental Agriculture, 25, 76-81. doi: 10.1071/EA9850076
Lloyd, D.L., Gramshaw, D., Hilder, T.B., Ludke, D.H. and Turner, J.W. (1985). Performance of North American and Australian lucernes in the Queensland subtropics 3. Yield, plant survival and aphid populations in rain grown stands.. Australian Journal of Experimental Agriculture, 25, 91-99. doi: 10.1071/EA9850091
Lloyd, D. L. and Hilder, T. B. (1985). Dry matter production by a subtropical grass (Makarikari grass) grown in association with a temperate annual legume (barrel medic) and nitrogen fertilizer in Southern Queensland. Australian Journal of Experimental Agriculture, 25 (1), 54-60. doi: 10.1071/ea9850054
Lloyd, D.L., Franzmann, B.A. and Hilder, T.B. (1983). Resistance of lucerne lines at different stages of plant growth to spotted alfalfa aphid and blue-green aphid.. Australian Journal of Experimental Agriculture and Animal Husbandry, 23 (122), 288-293. doi: 10.1071/EA9830288
Lloyd, D. L., Nation, J. G., Hilder, T. B. and O'Rourke, P. K. (1983). Productivity of grazed Makarikari grass-lucerne, Rhodes grass-lucerne and lucerne pastures in the northern wheat belt of Australia. Australian Journal of Experimental Agriculture and Animal Husbandry, 23 (123), 383-392. doi: 10.1071/EA9830383
Lowe, K.F., Lloyd, D.L. and Gramshaw, D. (1983). Lucerne cultivar characteristics and planting recommendations for Queensland in 1984. Queensland Agricultural Journal, 109, 277-278.
Gramshaw, D., Lowe, K.F. and Lloyd, D.L. (1982). Lucerne cultivar characteristics and planting recommendations for Queensland in 1983. Queensland Agricultural Journal, 108, 254-255.
Turner, J.W., Lloyd, D.L. and Hilder, T.B. (1981). Effects of aphids on seedling growth of lucerne lines 3. Blue-green aphid and spotted alfalfa aphid: a glasshouse study. Australian Journal of Experimental Agriculture and Animal Husbandry, 21 (109), 227-230. doi: 10.1071/EA9810227
Lloyd, D. L. (1981). Makarikari grass (Panicum coloratum var. makarikariense) - a review with particular reference to Australia. Tropical Grasslands, 15, 44-52.
Gramshaw, D., Lloyd, D.L. and Lowe, K.F. (1981). Growing new lucernes in Queensland. Queensland Agricultural Journal, 107, 249-254.
Irwin, J. A. G., Lloyd, D. L., Bray, R. A. and Langdon, P. W. (1980). Selection for Resistance to Colletotrichum-Trifolii in the Lucerne Cultivars Hunter River and Siro Peruvian. Australian Journal of Experimental Agriculture, 20 (105), 447-451. doi: 10.1071/EA9800447
Lloyd, D. L., Turner, J. W. and Hilder, T. B. (1980). Effects of aphids on seedling growth of lucerne lines .1. Blue-green aphid in field conditions (Acyrthosiphon kondoi shinji). Australian Journal of Experimental Agriculture and Animal Husbandry, 20 (102), 72-76. doi: 10.1071/ea9800072
Lloyd, D. L., Turner, J. W. and Hilder, T. B. (1980). Effects of aphids on seedling growth of lucerne lines .2. spotted alfalfa aphid (Therioaphis-trifolii f. maculata (monell)) in field conditions. Australian Journal of Experimental Agriculture and Animal Husbandry, 20 (105), 452-456. doi: 10.1071/ea9800452
Gramshaw, D., Lloyd, D.L., Lowe, K.F. and Turner, J.W. (1979). Lucerne cultivar recommendations 1979. QDPI Farmnote Agdex Index 121/32 No. F30.
Lloyd, D. L. (1978). Early growth of Makarikari and Rhodes grasses in different nitrogen and water regimes.. Queensland Journal of Agricultural and Animal Sciences, 35 (1), 53-61.
Lloyd, D. L. and Thompson, J. P. (1978). Numerical analysis of taxonomic and parent-progeny relationships among Australian selections of Panicum coloratum. Queensland Journal of Agricultural and Animal Sciences, 35 (1), 25-46.
Lloyd, D. L. (1974). Evaluation of makarikari grasses - potential production, nitrogen content and nitrogen recovery of two cultivars fertilized with urea. Australian Journal of Experimental Agriculture and Animal Husbandry, 14 (66), 38-48. doi: 10.1071/EA9740038
Lloyd, D. L., Nation, J. G. and Hilder, T. B. (1972). A restraining cradle for sheep. Queensland Journal of Agricultural and Animal Sciences, 29 (3), 237-240.
Lloyd, D. L. (1971). Growth and development of Makarikari grasses and three other subtropical species grown in the field at Toowoomba, Queensland. Australian Journal of Experimental Agriculture and Animal Husbandry, 11 (52), 525-531. doi: 10.1071/ea9710525
Lloyd, D.L. (1970). Pastures on the Darling Downs I. Queensland Agricultural Journal, 96, 434-441.
Lloyd, D.L. (1970). Pastures on the Darling Downs II. Queensland Agricultural Journal, 96, 543-551.
Lloyd, D. L. (1969). The nutrition and growth of lucerne on a sedentary black earth overlying a perched watertable on the eastern Darling Downs, Queensland. Tropical Grasslands, 3, 99-107.
Lloyd, D.L. and Scateni, W. (1968). Makarikari grasses for heavy soils. Queensland Agricultural Journal, 94, 721-724.

Conference Papers

Ballard, R.A., Peck, D.M., Lloyd, D.L., Howie, J.H., Hughes, S.J., Hutton, R.E. and Morgan, B.A. (2012). Susceptibility of annual medics (Medicago spp.) to powdery mildew (Erysiphe trifolii). 16th Australian Agronomy Conference, Armidale, NSW, Australia, 14-18 October 2012.
Lloyd, D.L., Clewett, J.F. and George, D.A. (2012). How to build soil carbon with sub-tropical pastures on marginal crop lands for climate change adaptation. NCCARF National Conference, Melbourne, VIC, Australia, 26-28 June 2012. Melbourne, VIC, Australia: National Climate Change Adaptation Research Facility.
Nichols, Phillip et al. and Lloyd, David (2006). New annual pasture legumes for southern Australia - 15 years of revolution. 13th Australian Agronomy Conference, Perth, WA, Australia, 10-14 September 2006. Perth, WA, Australia: The Regional Institute.
Lloyd, D.L., Johnson, B. and O’Brien, S.M. (2005). LeyGrain – a participatory action-learning model for ley pastures in cropping systems.. XX International Grassland Congress, Dublin, Ireland, 26 June to 1 July 2005. Wageningen, The Netherlands: Wageningen Academic Publishers.
Lloyd, D.L. (2004). Successful integration of pastures in farming systems. 19th Annual Conference of the Grassland Society of NSW, Gunnedah, NSW Australia, 27-29 July 2004. Orange, NSW Australia: Grassland Society of NSW.
Bell, L., Lloyd, D., Bell, K., Johnson, B. and Teasdale, K. (2003). Seed softening in Hedysarum spp. – a new temperate forage legume with great potential. 11th Australian Agronomy Conference, Geelong, VIC, Australia, 2-6 February 2003.
de Koning, C.T., Lloyd, D., Hughes, S., McLachlan, D., Crocker, G., Boschma, S. and Craig, A. (2003). Hedysarum, a new temperate forage legume with great potential – Field evaluation. 11th Australian Agronomy Conference, Geelong, VIC, Australia, 2-6 February 2003.
Lloyd, D., de Koning, C., Hughes, S., Johnson, B. and McLachlan, D. (2003). A new temperate legume with great potential – breeding new cultivars of Hedysarum. 11th Australian Agronomy Conference, Geelong, VIC, Australia, 2-6 February 2003.
Lloyd, D.L., Johnson, B., O’Brien, S.M. and Teasdale, K.C. (2003). Sustaining grain production and quality with pastures in the northern grain belt – farmers learning together. 1st Australian Farming Systems Conference, Toowoomba, QLD, Australia, 7-10 September 2003.
Churchett, J., Walker, S. and Lloyd, D. (2002). Lucerne production following residual herbicides used in northern cropping systems. 13th Australian Weeds Conference, Perth, WA, Australia, 8-13 September 2002.
Lloyd, D. L., Johnson, B., Teasdale, K.C. and O’Brien, S.M. (2001). Lucerne for dryland farming systems in the Queensland subtropics. 10th Australian Agronomy Conference, Hobart, TAS, Australia, 2001.
Churchett, John, Walker, Steve and Lloyd, D.L. (1999). Lucerne seedling responses to residual herbicides in grain farming systems. 12th Australian Weeds Conference, Hobart, TAS, Australia, 12-16 September 1999.
Lloyd, D. L., Young, R. R., Teasdale, K. C., Johnson, B., Boschma, S. P. and O’Brien, S. M. (1999). Domestication of naturalised burr medic (Medicago polymorpha) from the cropping and pastoral areas of eastern Australia. VI International Rangeland Congress, Townsville, QLD, Australia, 1999.
Lloyd, D.L., Johnson, B., Teasdale, K.C. and O’Brien, S.M. (1998). Establishing ley legumes in the northern grain belt – undersow or sow alone. 9th Australian Agronomy Conference, Wagga Wagga, NSW, Australia, 20-23 July 1998.
Sandral, G.A., Dear, B.S., Nichols, P.G.H., de Koning, C.T., Evans, P.M. and Lloyd, D.L. (1998). A comparative performance of early flowering subterranean genotypes. 9th Australian Agronomy Conference, Wagga Wagga, NSW, Australia, 20-23 July 1998.
De Koning, C.T., Sandral, G.A., Dear, B.S., Lodge, G.M., Lloyd, D.L., Nichols, P.G.H. and Schubert, N.S. (1998). Evaluation of Trifolium subterraneum ssp. brachycalycinum in South Australia, New South Wales and Queensland. 9th Australian Agronomy Conference, Wagga Wagga, NSW, Australia, 1998.
Lloyd, D.L., Young, R.R., O’Neill, M., Teasdale, K. and Johnson, B. (1996). Variation in naturalised Medicago polymorpha collected from inland eastern Australia: II - Queensland.. 8th Australian Agronomy Conference, Toowoomba, QLD Australia, 1996.
Young, R.R., Lloyd, D.L., O’Neill, M., Teasdale, K. and Johnson, B. (1996). Variation in naturalised Medicago polymorpha collected from inland eastern Australia: I - NSW. 8th Australian Agronomy Conference, Toowoomba, QLD, Australia, 30 January - 2 February 1996.
Lloyd, D.L., Ryley, M.J., Simpson, G.B. and Johnson, B. (1992). Crop-pasture rotation. Queensland Crop Production Conference 1992, Biloela, QLD Australia, 1992. Toowoomba, QLD Australia: QDPI.
Lloyd, D.L. (1990). Organic farming and crop nutrition - nitrogen from pasture legumes. Queensland Crop Production Conference 1990, Toowoomba, QLD, Australia, 1990. Brisbane, QLD, Australia: QDPI.
Lloyd, D.L. (1990). Pasture establishment - a systems analysis approach. Weed Society of Queensland, Darling Downs/Lockyer Branch Conference 1990, Toowoomba, QLD, Australia, 6-10 August 1990.
Brinsmead, R.B., Weston, E.J. and Lloyd, D.L. (1989). Legumes for grain and forage in sub-tropical eastern Australia. Australian - New Zealand Ecological Agriculture Conference, Brisbane, QLD Australia, 1989.
Weston, E.J. and Lloyd, D.L. (1987). Pasture legumes-production constraints and prospects. Queensland Crop Production Conference, Toowoomba, QLD Australia, 1987. QDPI.
Lloyd, D.L. (1987). Review of breeding objectives - current and future requirements for Queensland. 3rd National Workshop, National Subterranean Clover Improvement Program, Wagga Wagga, NSW Australia, 1987.
Lloyd, D.L. (1987). Field evaluation and selection - are the methods and time scales being used selecting the most appropriate genotypes? A review of procedures in Queensland.. 3rd National Workshop, National Subterranean Clover Improvement Program, Wagga Wagga, NSW Australia, 1987.
Lloyd, D. L. (1984). Pasture rotations: an unused option in soil management. Farming to Survive - Managing the problems of '83, Moree, NSW, Australia, 1984.
Gramshaw, D., Lloyd, D.L. and Lowe, K.F. (1983). Evaluation of aphid-resistant lucernes from the USA in the Queensland sub-tropics. Proceedings XIV International Grassland Congress, Lexington, KI United States, 1983.
Lloyd, D.L. (1979). The role of legumes in nitrogen transformations. Nitrogen Relationships in Pasture Systems of Southern Queensland, Toowoomba, QLD, Australia, 5 June 1979.
Lloyd, D.L., Turner, J.W. and Hilder, T.B. (1978). Field evaluation of aphid resistance of seedlings of lucerne cultivars. Lucerne Aphid Workshop, Tamworth, NSW Australia, 1978. Tamworth, NSW Australia: NSW Department of Agriculture.
Gramshaw, D., Lloyd, D.L. and Lowe, K.F. (1978). Aphid resistant Lucerne variety testing in Queensland. Lucerne Aphid Workshop, Tamworth, NSW Australia, 1978. Tamworth, NSW Australia: NSW Department of Agriculture.
Lloyd, D. L. (1974). Production of a Makarikari grass pasture on the Darling Downs, Queensland, and its use in a system of animal production. XII International Grassland Congress, 1974, Moscow, USSR, 1974. Moscow: Organising Committee, XII International Grassland Conference.
Lloyd, D.L. (1970). Makarikari grass studies, Toowoomba, Queensland. XI International Grassland Congress, 1970, Surfers Paradise, Australia, Surfers Paradise, QLD, Australia, 13-23 April 1970. St Lucia, QLD, Australia: The University of Queensland Press.

Thesis

Lloyd, D.L. (1964). The yields and persistence of 12 introduced strains of Glycine javanica and their relation to the fertility of an alluvial clay soil at Lawes, S.E.Qld.. Honours Thesis, Faculty of Agriculture, The University of Queensland.

Department Technical Reports

Churchett, J. and Lloyd, D. L. (1999). Destroy Saffron Thistle in Lucerne Pastures. Will saffron thistle be a problem on your property?. FSI CropLink Information Series, QI 99049 Agdex No. 121/642. Farming Systems Institute, DPI&F Queensland.
Lloyd, D.L. and Johnson, B. (1993). Promoting a new serradella pasture technology in Queensland. Alternative Pasture Legumes, Technical Report 219. Department of Primary Industries South Australia.
Lloyd, D.L. and Smith, K.P. (1989). Lifting Grain Yield and Protein with lucerne rotations. QDPI Extension Publication, Agdex 121/18 SQA 89010. DPI&F Queensland.
Lloyd, D.L. (1986). Crop-livestock integration. Conservation Cropping Review Southern Queensland, QDPI Mimeograph RQW 86015. QDPI.
Lloyd, D.L. (1985). Serradella (Ornithopus spp.) adaptation in southern inland Queensland - preliminary observations. Alternative Pasture Legumes for Southern Australia, Technical Report No. 85. South Australia Department of Agriculture.
Lloyd, D.L. (1985). Resume of research with alternative pasture legumes in Queensland. Alternative Pasture Legumes for Southern Australia, Technical Report No. 85. South Australia Department of Agriculture.
Lloyd, D.L. (1984). The role of lucerne and pasture legumes in overcoming soil fertility degradation in cropping soils of the Darling Downs and South-West Regions of Queensland. Darling and Western Downs Pasture Agronomy Publication, Darling and Western Downs Pasture Agronomy Publication 84/2. QDPI.
Lloyd, D.L. (1984). Legume leys - their effect on soil fertility restoration and subsequent crop growth in the northern wheat belt of Australia. QDPI Hermitage Research Station Industry Consultative Committee Report, Darling and Western Downs Pasture Agronomy Publication 84/1. Hermitage Research Facility, QDPI.