| Plant species diversity and management of temperate forage and grazing land ecosystems. MA Sanderson, DJ Barker, GR Edwards, B Tracy, RH Skinner, D Wedin Crop Science 44, 1132, 2004 | 369 | 2004 |
| Impacts of spatial patterns in pasture on animal grazing behaviour, intake and performance DF Chapman, AJ Parsons, GP Cosgrove, DJ Barker, DM Marotti, ... Crop Science 47, 399, 2007 | 181 | 2007 |
| Water deficit effects on osmotic potential, cell wall elasticity, and proline in five forage grasses. DJ Barker, CY Sullivan, LE Moser Agronomy Journal 85, 270, 1993 | 135 | 1993 |
| Vegetation diversity, growth, quality and decomposition in managed grasslands. TA White, DJ Barker, KJ and Moore Agriculture Ecosystems and Environment 101, 73, 2004 | 117 | 2004 |
| Integrating winter annual forages into a no-till corn silage system. GS Faé, RM Sulc, DJ Barker, RP Dick, ML Eastridge, N Lorenz. Agronomy Journal 101, 1286, 2009 | 97 | 2009 |
| Pinitol accumulation in mature leaves of white clover in response to a water deficit. MT McManus, RE Bieleski, JR Caradus, DJ Barker Environmental and Experimental Botany 43, 11, 2000 | 71 | 2000 |
| Plant diversity effects on herbage production and compositional changes in New Zealand hill country pastures. 32. M.B. Dodd, D.J. Barker, and M.E. Wedderburn. MB Dodd, DJ Barker, ME Wedderburn. Grass and Forage Sci. 59, 29, 2004 | 53 | 2004 |
| Influence of pastoral fallow on plant root growth and soil physical and chemical characteristics in a hill pasture. ZN Nie, AD Mackay, I Valentine, DJ Barker, J Hodgson Plant and Soil 197, 201-208, 1997 | 53 | 1997 |
| Seasonal variation in the rising plate meter calibration for forage mass. FP Ferraro, RM Sulc, RLG Nave, DJ Barker. Agronomy journal 104, 1, 2012 | 43 | 2012 |
| Analysis of herbage mass and herbage accumulation rate using Gompertz equations. DJ Barker, FP Ferraro, RLG Nave, RM Sulc, F Lopes, KA Albrecht. Agron J. 102, 849, 2010 | 43 | 2010 |
| Introduction, production and persistence of five grass species in dry hill country 8. Summary and Conclusions. DJ Barker, JA Lancashire, SC Moloney, N Dymock, DR Stevens, ... New Zealand journal of agricultural research 36, 61, 1993 | 40 | 1993 |
| Relationships of forage nutritive value to cool-season grass canopy characteristics. RLG Nave, RM Sulc, DJ Barker Crop Science 53, 341, 2013 | 38 | 2013 |
| Changes in plant population density, composition and sward structure of a hill pasture during a pastoral fallow. ZN Nie, AD Mackay, DJ Barker, I Valentine, J Hodgson Grass and Forage Science 52, 190, 1997 | 30 | 1997 |
| Root distribution in a low fertility hill country sward grazed by sheep - a short communication. DJ Barker, DM Zhang, AD Mackay New Zealand journal of experimental agriculture. 16, 73, 1988 | 25 | 1988 |
| Oversowing ‘Grasslands Wana’ cocksfoot, ‘Grasslands Maru’ phalaris, and ‘Grasslands Tahora’ white clover in hill country at varying rates of paraquat and glyphosate. DJ Barker, DF Chapman, CB Anderson, N Dymock New Zealand Journal of Agricultural research., 1988 | 25 | 1988 |
| Forage fertilization and nutrient management DJ Barker, M Collins Forages, an Introduction to Grassland Agriculture, 6th ed., Iowa State Press …, 2003 | 22 | 2003 |
| ‘Grasslands Wana’ cocksfoot persistence and autumn/winter production in hill country, under contrasting managements and micro-topographies. DJ Barker, CB Anderson, N Dymock New Zealand journal of agricultural research 34, 25, 1991 | 16 | 1991 |
| Phosphoglucoisomerase-2 allozymes for distinguishing perennial ryegrass cultivars in binary mixtures. PM Sanders, DJ Barker, GS Wewala Journal of Agricultural Science, Cambridge. 112, 179, 1989 | 16 | 1989 |
| Inputs and losses by surface runoff and subsurface leaching for pastures managed by continuous or rotational stocking. LB Owens, DJ Barker, SC Loerch, MJ Shipitalo, JV Bonta, RM Sulc Journal of Environmental Quality 41, 106-113, 2012 | 14 | 2012 |
| Soil surface moisture measurement and its influence on the establishment of three oversown legume species. MH Awan, DJ Barker, PD Kemp, MA Choudary Journal of agricultural science, Cambridge 127, 169, 1996 | 14 | 1996 |
D.F. ChapmanDairyNZVerified email at dairynz.co.nz