Is it easier to manage weeds in agrivoltaic setups?

Reducing Weed Pressure

In agrivoltaic systems, the solar panels provide some shade to the underlying crops, which can lead to a reduction in weed growth. This is because most weeds thrive in full sun conditions, and the partial shading can limit their growth. A study found that in a wheat-based agrivoltaic system, the average weed density was 20-30% lower than in a nearby, full-sun control plot. This reduced weed pressure can make it easier to manage weeds, as fewer will be competing for resources such as water and nutrients.

Shading Effects on Weed Growth

The degree of shading from the solar panels will depend on their angle and orientation, as well as the type of crops being grown. For example, in a study on a soybean-based agrivoltaic system, it was found that the solar panels reduced the temperature of the soil surface by 5-7°C, which slowed down weed growth. This reduced growth rate can make it easier to control weeds through mechanical or cultural means. By using a combination of techniques such as mulching and shallow tillage, agrivoltaic farmers can take advantage of the reduced weed pressure and improve the overall efficiency of their operations.