Publication: Accumulation and distribution of phosphorus in the soil profile under fertilized grazed pasture.

Recent publication from Soil Science PhD student Gustavo Boitt, co-author.

Tian, J., Boitt, G., Black, A., Wakelin, S.A., Chen, L. and Condron, L.M. 2017. Accumulation and distribution of phosphorus in the soil profile under fertilized grazed pasture.Agriculture, Ecosystems and Environment 239: 228-235.

The fate of P from long-term fertilizer inputs to the soil is of great economic and environmental concern but remains poorly understood. This publication discusses how sequential fractionation was used to investigate P accumulation and distribution in the soil profile to 100cm and its results. Findings indicated that P applied in excess of agronomic requirements and soil retention capacity was transferred below the topsoil and root zone by leaching.

Want to read more? follow the link below.

Research Gate Link to Publication: Accumulation and distribution of phosphorus in the soil profile under fertilized grazed pasture


The Colourful History of Soil Mapping

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PhD Postgrad Intro – Zach Simpson

Zach Simpson – Doctor of Philosophy (PhD) in Soil Science

Zach Simpson is currently studying for his PhD in the field of Soil Science at Lincoln University. Professors Richard McDowell and Leo Condron are supervising this research.

“Howdy, I hail from Arkansas, USA, where I studied watershed hydrology and water quality at the University of Arkansas. Multiple sources of pollution (urban and agricultural) threaten the quality of the streams in the Ozark Mountains which spurred my interest in contaminant transport, stream hydrology, and ecological impacts within the stream and receiving water bodies. Stream pollution is a global issue and in my search for further study I was led to New Zealand where research in this topic is quite active.

My PhD topic is concerned with the transport of phosphorus in streams in relation to stream sediments via sorption: the chemical and physical properties of sediment, sediment sources and transport through catchments, physical and chemical conditions needed for exchange of phosphorus between the sediment and the water, and hyporheic (subsurface zone where groundwater and surface water interact) processes affecting phosphorus transport. The complexity of streams fascinates me and I feel challenged, yet encouraged, to tackle the problem.”


PhD Postgrad Intro – Camilla Gardiner

Camilla Gardiner – Doctor of Philosophy (PhD) in Soil Science

Camilla Gardiner is currently studying for her PhD in the field of Soil Science at Lincoln University. Professors Timothy Clough, Keith Cameron, Hong Di and Grant Edwards are supervising this research.

“I’m from Seattle, Washington. I graduated with an Honors BSc from UC Berkeley in Environmental Science and wrote my thesis there on the potential for San Francisco municipal compost application on California rangeland soils to increase soil carbon sequestration and how that annual carbon sequestration correlates to annual rainfall.

Camilla Gardiner

My PhD thesis title is “The potential for ruminant forage diet manipulation to mitigate urine-derived soil nitrous oxide emissions”. We are looking to identify naturally-occurring inhibitors, either in urine or in forage plants, that reduce nitrification in urine-affected soils and therefore reduce resulting N2O emissions.”

Link to Fellow Lincoln Bloggers

Spread the word, spread the knowledge. Check out other bloggers at Lincoln University.

Prof Brett Robinson – Environmental Chemistry:

Dr Niklas Lehto: Dr Niklas Lehto – Biogeochemistry Research


Dryland Pasture Research :

Science Communication is Key

Attendees at the Waihao Wainono Community Catchment Group Field Day were informed about up to date research to help farmers to maximise their soil while meeting land management rules.

Plant and Food Research Scientist Trish Fraser used soil samples that had been under different management to demonstrate the rates of water infiltration when a soil has been repeatedly cultivated or under pasture. Soil structure under pasture is greatly improved with time.

The communication of scientific research to those who can benefit from it is key to keeping New Zealand agriculture moving forward and preserving our environment.

See article:

Image: Soil scientist Trish Fraser talks to farmers at the Waihao Wainono Community Catchment Group’s field day at Hugh and Liz Wigley’s farm. Photo / Sally Brooker.