net energy
Quick Summary
Net energy in agriculture refers to the balance between the energy consumed and the energy produced. Sustainable agriculture aims to create a positive energy balance by minimizing energy input and maximizing energy output. This involves practices like using diverse crops, polyculture, crop rotation, and composting to improve soil health and reduce reliance on chemical inputs.1
In animal agriculture, sustainable practices focus on reducing greenhouse gas emissions from livestock and improving animal health to prevent disease outbreaks. Water conservation is also crucial, with methods like improved irrigation and drought-resistant crops reducing water waste.1
The energy efficiency of photosynthesis, the process by which plants convert light energy into chemical energy, has a theoretical maximum of about 26 percent. However, actual energy storage in crops is much lower due to factors like light absorption limitations, energy used for plant respiration, and seasonal growing periods. Sustainable agriculture seeks to shift from nonrenewable fossil fuels to clean, renewable energy sources for farm operations.21
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