A5002044514- Soil Carbon and Nitrogen Dynamics
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Climate change impacts on agriculture
- Groundwater flow and contamination studies
- Ruminant Nutrition and Digestive Physiology
- Hydrology and Watershed Management Studies
- Soil Moisture and Remote Sensing
- Pasture and Agricultural Systems
- Plant nutrient uptake and metabolism
- Crop Yield and Soil Fertility
- Agriculture Sustainability and Environmental Impact
- Heavy metals in environment
- Agronomic Practices and Intercropping Systems
- Wastewater Treatment and Nitrogen Removal
- Irrigation Practices and Water Management
- Rice Cultivation and Yield Improvement
- Bioenergy crop production and management
- Mine drainage and remediation techniques
- Groundwater and Isotope Geochemistry
- Clay minerals and soil interactions
- Agroforestry and silvopastoral systems
- Rangeland and Wildlife Management
- Geophysical Methods and Applications
- Pesticide and Herbicide Environmental Studies
Aarhus University
2019-2024
Kiel University
2020-2024
Karlsruhe Institute of Technology
2023
James Hutton Institute
2023
Plant & Food Research
2018-2022
AgResearch
2010-2019
Planta
2018
Mt Albert Primary School
2018
Riddet Institute
1997-2002
Université Grenoble Alpes
2000
To improve agricultural sustainability, alternative cultivation methods and assessment tools need to be developed. Integrating service crops (SC) can potentially increase cropping system multifunctionality mitigate negative climate environmental impacts of agriculture. (1) Calibrate oats, winter wheat red clover SC, grown as sole intercrops, in the model APSIM NG for northern Europe conditions. (2) Use calibrated crop modules assess ecosystem processes from an intercropping system. (3)...
There is a pressing need to support farmers' decisions on grassland renovation, based sound scientific evidence regarding its effects productivity, herbage quality and soil organic carbon stocks. To quantify these long-term experiment with grass/white clover swards was set up at the Lindhof research farm in Northern Germany 1995. Treatments included control plots of undisturbed as well 10 renovations starting after (2005) years repeated different times until 2019, without addition slurry...
Abstract To investigate a rapid, nondestructive way of characterizing solute transport properties, time domain reflectometry (TDR) and disk permeametry have been used in combination. Calibration measurements had previously related TDR to both the volumetric water content pore concentration Cl ‐ . Laboratory from horizontal probe were estimate parameters soil column by applying one‐dimensional numerical model an inverse sense. A vertical was provide independent verification these parameters....
Modelling water and solute transport through soil requires the characterisation of hydraulic functions; however, determining these functions based on measurements is time-consuming costly. Pedotransfer (PTFs), which make use easily measurable properties to predict functions, have been proposed as an alternative measurements. The better known more widely used PTFs were developed in USA or Europe, where large datasets exist. No specific published for New Zealand soils. To address this gap, we...
Denitrification is a key but poorly quantified component of the N cycle. Because it difficult to measure gaseous (NOx, N2O, N2) and soluble (NO3) components denitrification with sufficient intensity, models varying scope complexity have been developed applied estimate how vegetation cover, land management environmental factors such as soil type weather interact control these variables. In this paper we assess strengths limitations different modeling approaches, highlight major uncertainties,...
Soil structure plays a central role in many soil processes that are environmentally relevant. Intermittent freezing of the over winter is an important abiotic disturbance temperate climates and its effects on depend soil's preexistent structural strength cohesion. Management choices such as tillage plant cover after harvest strongly influence structure, therefore response to freeze-thaw. We examined 5 freeze-thaw cycles (FT) µCT-detectable intact topsoil cores (Ø=100 mm, h=80 mm) from...
For arable stockless farming systems, the integration of catch crops (CC) during fallow period might be a key for closing nitrogen (N) cycle, reducing N leaching and increasing transfer to subsequent crop. However, despite considerable research efforts, fate in such integrated systems remains unclear. To address this, two-year field experiment was carried out northern Germany with different CC, including frost-tolerant frost-killed CC. The started following ryegrass/red clover ley, which...
Catch crops have been proven effective in reducing nitrogen leaching cropping systems due to their uptake of post-harvest soil mineral N prior the main percolation season winter. Information on residual effect catch crops, and fertilizer replacement value is scarce. To determine values for different a field experiment was conducted over four-year period sandy Denmark, involving crop mixtures with non-legume legume species. The measured spring barley grown year. For comparison, winter rye...
Decision support tools for precise irrigation scheduling are required to improve the efficiency of water use globally. This article presents a method mapping soil variability and relating it hydraulic properties so that management zones variable-rate can be defined. A soil-water balance is used schedule hypothetical events based on one blanket application eliminate plant stress (uniform rate irrigation, or URI) compares this (VRI), where tailored specific zone available water-holding...
A transfer function (TF) was developed to assist with the estimation of nitrogen (N) leaching from urine-affected areas in grazed pastures. The proposed TF uses a simple describe likely breakthrough curve for urine-N deposited different months and various climates soils New Zealand. designed be integrated into OVERSEER® Nutrient budgets model increase sensitivity N month urine deposition, but could also used any other that estimates water balance plant uptake on monthly basis. inputs...
Intensive confinement (IC) systems for dairying have become widespread during the last decades. However, potential advantages of alternative such as full-grazing (FG) or integrated dairy/cash-crop (IFG) with regards to better provision ecosystem services are widely discussed. To investigate performance and environmental impacts, we compared four prevailing dairy using an on-farm research study. The farm types differed in their share pasture access quantity resource inputs: (i) IC a high...