Affiliation: Plant and Food Research
Email: Paul.Johnstone@plantandfood.co.nz
Website: https://www.plantandfood.co.nz/
Honours, awards, and memberships:
• New Zealand Soil Science Society
• International Society of Precision Agriculture
• Agronomy Society of New Zealand
• New Zealand Institute of Agricultural and Horticultural Science
• Associate-editor, New Zealand Journal of Crop and Horticultural Science.
Research Interests:
My current research covers a broad range of initiatives addressing high productivity, low footprint production systems. A key focus is on quantifying nutrient losses from cropping systems, linking these to soil, climate and management factors, and identifying practices to minimize adverse impacts on water bodies. Other research interests include digital horticulture and climate change which have a focus on improving the productivity, profitability and resilience of cropping systems.
List of your recent publications:
Teixeira EI, de Ruiter J, Ausseil AG, Daigneault A, Johnstone P, Holmes A, Tait A, Ewert F 2017. Adapting crop rotations to climate change in regional impact modelling assessments. Science of the Total Environment. DOI: https://doi.org/10.1016/j.scitotenv.2017.10.247
Reid JB, Hunt AG, Johnstone PR, Searle BP, Jesson LK 2017. On the responses of carrots (Daucus carota L.) to nitrogen supply 2017. New Zealand Journal of Crop and Horticultural Science. DOI: http://www.tandfonline.com/doi/full/10.1080/01140671.2017.1402790
Chakwizira E, Fletcher AL, Johnstone P, de Ruiter JM, Pearson AJ, Parker M 2017. Maize silage-winter crop sequences that maximise forage production and quality. New Zealand Journal of Agricultural Research. DOI: http://dx.doi.org/10.1080/00288233.2017.1415943
Teixeira EI, Johnstone P, Chakwizira E, de Ruiter J, Malcolm B, Shaw N, Zyskowski R, Khaembah E, Sharp J, Meenken E, Fraser P, Thomas S, Brown H, Curtin D 2016. Quantifying key sources of variability in cover crop reduction of N leaching. Agriculture, Ecosystems and Environment 220: 226–235.
Qiu W, Curtin D, Johnstone P, Beare M, Hernandez-Ramirez G 2016. Small-scale spatial variability of plant nutrients and soil organic matter: an arable cropping case study. Communications in Soil Science and Plant Analysis 47: 2189–2199.
Searle BP, Johnstone PR, Reid JB 2016. Aspects of production affecting variability in vegetable crop quality. Acta Horticulturae 1123: 17–26.
Reid JB, Trolove SN, Tan Y, Johnstone PR 2016. Nitrogen or potassium preconditioning affects uptake of both nitrate and potassium in young wheat (Triticum aestivum). Annals of Applied Biology 168: 65–80.
Chakwizira E, Johnstone P, Fletcher AL, Meenken ED, de Ruiter JM, Brown HE 2015. Effects of nitrogen rate on nitrate–nitrogen accumulation in forage kale and rape crops. Grass and Forage Science 70: 268–282.