How do differences in soil texture affect the amount of water in the soil?
Vary soil type (texture) and determine the impact on soil water parameters. For example, compare soil horizons composed of soil types with lower plant available water capacity (e.g. sand, loamy sand or sandy clay) with soil horizons composed of soil types with higher plant available water capacity (e.g. silt). The maximum plant available water capacities of different soil types can be seen on the SoilInput worksheet. Run the model with the different soil types and look at ActTrans, ActEvap, and drainage. Some possible questions to ask are: Why do these parameters change with soil type? Why do soils with sand have less water holding capacity than soils with a finer texture (silts)? We can help you with educational materials to answer questions like these. Impacts of global climate change How would a change in precipitation amount or timing affect soil water and evapotranspiration? For a given GLOBE site or sites, maintain the same plant and soil parameters. Maintain the same total annua
