We studied how maize crops use water and absorb carbon under contrasting climates using a land surface model coupled with a photosynthesis scheme. The model successfully reproduced ecosystem-scale crop productivity, water loss, and water use efficiency, a key indicator linking carbon uptake and water use. Our results show that the model can reliably capture crop responses to climate and irrigation practices, helping improve predictions of agricultural water use and crop productivity.

Manual chambers for soil respiration monitoring can be cost-effective yet rather accurate devices. The described chamber is relatively low in cost and entirely built from commercial parts, which makes it very accessible for almost everybody. Our chamber is robust, simple to operate, and very suitable for a large-scale punctual campaign and for educational purposes. Oxygen sensors bring some more insights into our soil respiration understanding.

Surface energy balance (SEB) closure check and important environmental variable monitoring require soil heat flux measurement. On the one hand every experimental technique has its possible errors and needs to be checked and corrected. On the other hand, SEB equation should include all sensed energy sources and sinks.

Soil evaporation is one of the most important water vapor sources on the Earth with multiple and severe consequences; however, there is a relative lack of instruments to measure it. This study describes a simple apparatus making the soil evaporation measurement accessible. The soil evaporation complexity is overcome by measuring the evaporation dynamic under different measurement conditions. A relatively simple measurement correction is then performed depending on the wind speed.