Rather than carbon footprint, it is much more relevant and comprehensive to measure ecological footprint:

1. https://www.footprintnetwork.org/our-work/ecological-footprint

2. https://www.footprintcalculator.org

3. https://books.google.co.uk/books?hl=en&lr=&id=WVNEAQAAQBAJ

4. https://www.sciencedirect.com/science/article/pii/S1470160X15005269

5. https://www.sciencedirect.com/science/article/pii/S0921800908003376

If requested (either because legal regimens request it or because the environmental education/knowledge of the farmers), some environmental impact assessment teams can provide anexs with in-deep calculations of the carbon footprint/ecological footprint based on their work/production methodologies. Though this isn't a common practice.

Some emmisions are fairly easy to measure, but don't reflect the whole picture. There exist CO2 meters for indoor spaces but I'm not sure that those are suitable for, for example, greenhouses; and of course those are discarded in open sky plantations. The emmisions of heave duty machinery and tools are also measurables.

There isn't an straighforward way to measure a lot of other variables (for example, how much positive impact has the plantation in CO2 capture, for example) that doesn't involve certified professionals and/or laboratories, however, estimates can be done with fairly basic software and capacitation!, specially the emmisions of gasoline powered tools and trucks, for example.

When soil is cultivated it causes the release of carbon dioxide into the air as soil organic matter oxidizes. Reducing the amount of soil disturbance and moving towards lower-tillage systems can reduce this flow of carbon from the soil, but it will not suit all situations. Selecting energy-efficient technologies is another way to reduce direct carbon emissions. Energy efficiency is about consuming less energy to get the same amount of work with the help of innovative design and technologies. Project managers must collaborate with technology partners to explore energy efficiency options. This can be done by taking plant matter such as wood, cork, hemp and algae that has captured atmospheric carbon via photosynthesis and using it directly. Alternatively, it can be turned into other materials that store carbon more permanently. Carbon footprints can be reduced through improving energy efficiency and changing lifestyles and purchasing habits. Switching one's energy and transportation use can have an impact on primary carbon footprints. A digital carbon footprint refers to the greenhouse gas (GHG) emissions that digital technology resources, devices, tools and platforms produce. The environmental effects of the internet and digital technology tend to be out of sight, out of mind. Nevertheless, those environmental costs are real. EPA and Colorado State University have developed the Agriculture and Land Use Greenhouse Gas Inventory (ALU) Software to guide inventory compilers through the process of estimating GHG emissions and removals related to agricultural and forestry activities. Reducing your carbon footprint is important because it mitigates the effects of global climate change, improves public health, boosts the global economy, and maintains biodiversity. When we cut carbon emissions we help ensure cleaner air, water, and food for our generation and for generations yet to come.