Nutrient gradients in Temperate Alley Cropping: A Field- to-Lab Training on Soil Nutrient Dynamics

This 30-day on-site research praxis trains students in soil nutrient dynamics in a temperate alley-cropping system in northern Germany. The project focuses on spatial nutrient variability, especially phosphorus, and on how tree rows affect nutrient availability and use efficiency across distance-to-tree transects.

Students will plan and conduct transect sampling, collect soil samples, and analyse key soil indicators and selected enzyme activities linked to nutrient cycling. Root sampling and basic root parameter measurements complement the soil analyses to relate rooting patterns to nutrient mobilisation.

The praxis integrates fieldwork, laboratory methods, and data evaluation, supported by literature management.

General learning outcomes

• Design, implement, and evaluate transect-based sampling schemes to quantify spatial variability in agroforestry systems.
• Apply and interpret laboratory methods for soil P pools and pH and assess key biogeochemical indicators of P mobilisation (enzyme activity).
• Conduct basic root sampling and trait quantification, including root washing and scanning, and link root patterns to soil nutrient gradients.
• Analyse and visualise spatial gradient data using R/RStudio.
• Demonstrate scientific literacy and communication through targeted literature search and management (Zotero), scientific report writing, and presentation.

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