The U.S. Department of Agriculture just published an important roadmap for America’s farmers and ranchers to measure their greenhouse gas emissions and evaluate opportunities for reducing them.
Previously, insufficient data and lack of scientific consensus have impeded natural resource stewards from calculating GHG fluxes from management practices – especially since biological systems are dynamic and complex. But the new Greenhouse Gas Report provides thorough guidelines for understanding how different management practices influence GHG emissions on farms, ranches and forests.
This is a major breakthrough in mitigating the impacts of climate change on working lands. By helping landowners better understand their impacts, farmers, ranchers and forest owners will be better equipped to calculate their emissions and account for these impacts through voluntary participation in GHG mitigation or carbon sequestration projects across the country.
This September, a new crop will be made available to rice producers: carbon offsets.
Fertilizer use is key to increasing the productivity necessary for farms to feed rising populations. However, not using the right amount in the right place at the right time is one of the biggest threats to a stable climate. Nitrogen fertilizer not used by crops emits nitrous oxide, a heat-trapping gas 300 times more powerful than carbon dioxide. It also contaminates water supplies, causes algae blooms downstream and erodes soil health.
There’s a growing excitement around spreading compost on rangelands to help fight climate change. Over the past four years we have learned that grazed rangelands are really good at pulling carbon out of the air and sequestering it in the soil below. And if you add compost just one time, you can capture carbon dioxide from the atmosphere for more than seven years. Plus, you’ll increase both the quality of the grasses and the ability of the soils to hold water. If we scaled this to just 5 % of California’s rangelands, we could capture approximately 28 million metric tons of carbon dioxide per year, which is about the same as the annual emissions from all the homes in California.