KlausSipope/soil-trials-mapping-africa

Interactive Shiny app for visualizing soil trial data across African countries # Soil Trials Mapping Africa 🌍 An interactive Shiny web application for visualizing and analyzing soil trial data across African countries. Built for agronomic research, policy support, and decision-making, this tool allows users to explore soil indicators (e.g., pH, nutrients, texture) by location, depth, crop, and trial type. --- ## 🎯 Purpose This project supports the analysis and visualization of soil quality across different trials and countries (Mozambique, Tanzania, and Uganda). It aims to facilitate: - Field-level soil indicator tracking - Cross-country comparisons of trial results - Data-driven decision-making for soil health management --- ## 🌐 Live Demo 👉 Launch the App --- ## 🛠️ Technologies Used - **R + Shiny**: Interactive web app development - **Leaflet**: Dynamic mapping - **sf**: Geospatial data handling - **rnaturalearth**: Country boundary shapefiles - **dplyr / readxl / writexl**: Data manipulation and cleaning --- ## 🧪 Features ✅ Filter by: - Country: Mozambique, Tanzania, Uganda - Soil depth: Top soil / Subsoil (based on data) - Trial type: I-FOT, E-FOT, Satellite, FOT, FRS - Crop: Maize, Beans, Rice, etc. ✅ Color-coded maps by: - Soil pH - Macro and micro nutrients (P, K, Ca, Mg, etc.) - Soil texture (%Sand, %Clay, %Silt) - Carbon, Nitrogen, CEC, and more ✅ Click markers to view: - Trial location - Trial type - Crop - Measured value of selected soil variable (e.g., pH) ✅ Dynamic legend generation based on variable --- ## 📂 Project Structure ```text soil-trials-mapping-africa/ ├── app.R # Shiny app code ├── preprocessing.R # Script to merge and clean country datasets ├── general_dataset.xlsx # Harmonized dataset used in the app ├── data/ # (Optional) Raw Excel files ├── www/ # (Optional) Assets (e.g., CSS or images) └── README.md # This file ``` --- ## 📁 Data Access ⚠️ **Note**: This project was developed during my time at IFDC. The datasets used in the applicat …