1. Plant root morphology and nutrient uptake;Barber S.;Roots, Nutrient and Water Influx, and Plant Growth: ASA Special Publication,1984
2. Relative growth rate, resource allocation and root morphology in the perennial legumes, Medicago sativa, Dorycnium rectum and D. hirsutum grown under controlled conditions
3. Bell, M., D. Lester, L. Smith, and P. Want 2012. Increasing complexity in nutrient management on clay soils in the northern grain belt–nutrient stratification and multiple nutrient limitations. In Proceedings of 16th Australian Agronomy Conference. Armidale, Australia, 14–18.
4. Bell, M., D. Sands, D. Lester, and R. Norton 2015. Response to deep placed P, K and S in central Queensland. In “Proceedings of 17th Australian Agronomy Conference”, Hobart, Australia.
5. Nutrient efficiency — what do we really mean?