- Joined
- 30 June 2008
- Posts
- 15,357
- Reactions
- 7,232
Quality farming activities are compatible with using large areas of land for solar energy production . In fact they can be mutually supportive and add another value to the enterprise.
www.ecogeneration.com.au
Livestock grazing
Grazing of livestock within solar farms is the most popular dual use option, especially since this practice has the additional benefit of controlling vegetation growth. The presence of solar modules does not affect stock density, and provides shelter to grazing livestock.
However, consideration needs to be given to the choice of livestock. Sheep are common (see image above) as they are small enough to easily pass between rows of modules and do not damage equipment. For similar reasons, poultry such as chicken and geese are also common choices.
Grazing of larger livestock such as cattle and horses in solar farms has been attempted; however, the mounting system must be designed to accommodate their greater size.
Crop production
Solar farms can also be combined with crop production. Planting of vegetables or non-food crops can occur underneath the solar arrays. This practice is also referred to as solar sharing or “˜agrivoltaics’.
In Japan, the practice known as “˜solar sharing’ is allowed on farmlands, where small, typically 100 W, solar modules are mounted three to five metres above ground and installed at spaced intervals with shading rate of up to 32 per cent to allow sufficient irradiation for the ground crop (see image below). The mounting structures are designed to allow space for tractors and other farming equipment, allowing farmers to receive a feed-in tariff from electricity generated while being able to continue farming without modification to their normal practices
Enhancing biodiversity
Solar farms also present the opportunity to enhance the biodiversity of a site, especially if the site previously supported monocrops. Native wildflower and bird seed mixes can be sown between and around rows of modules, providing food and habitat for local birds, small mammals and invertebrates. Planting of species that have high pollen and nectar yields also presents beekeeping as an additional revenue option.
Solar farms, land use and the rise of solar sharing
Critics of utility scale solar developments often point to the amount of productive land taken up by solar arrays, but
www.ecogeneration.com.au
Livestock grazing
Grazing of livestock within solar farms is the most popular dual use option, especially since this practice has the additional benefit of controlling vegetation growth. The presence of solar modules does not affect stock density, and provides shelter to grazing livestock.
However, consideration needs to be given to the choice of livestock. Sheep are common (see image above) as they are small enough to easily pass between rows of modules and do not damage equipment. For similar reasons, poultry such as chicken and geese are also common choices.
Grazing of larger livestock such as cattle and horses in solar farms has been attempted; however, the mounting system must be designed to accommodate their greater size.
Crop production
Solar farms can also be combined with crop production. Planting of vegetables or non-food crops can occur underneath the solar arrays. This practice is also referred to as solar sharing or “˜agrivoltaics’.
In Japan, the practice known as “˜solar sharing’ is allowed on farmlands, where small, typically 100 W, solar modules are mounted three to five metres above ground and installed at spaced intervals with shading rate of up to 32 per cent to allow sufficient irradiation for the ground crop (see image below). The mounting structures are designed to allow space for tractors and other farming equipment, allowing farmers to receive a feed-in tariff from electricity generated while being able to continue farming without modification to their normal practices
Enhancing biodiversity
Solar farms also present the opportunity to enhance the biodiversity of a site, especially if the site previously supported monocrops. Native wildflower and bird seed mixes can be sown between and around rows of modules, providing food and habitat for local birds, small mammals and invertebrates. Planting of species that have high pollen and nectar yields also presents beekeeping as an additional revenue option.
