Why farm sustainably?

Last August before returning to the US, three of us from the E-CARE office in Santiago traveled to San Mateo, Isabela to attend the Phillipine Rice Research Institute’s (PhilRice) Farmer Training School, and to present on how rice cultivation contributes to climate change.

The week prior, we had dropped by PhilRice’s local office to share with them our project idea and talk about alternate wetting and drying (AWD), a sustainable irrigation technique. They were supportive of our initiative and praised AWD for its water-savings benefits and invited us to present on the reciprocal relationship between rice farming and climate change.

Controlled Irrigation: Promotes the right timing of field irrigation, lessens water usage, reduces methane emissions

So we arrived yesterday morning to the open warehouse-type space at PhilRice’s demo farm where 30 farmers were gathered to learn the best practices on land preparation, fertilizer management and greenhouse gas mitigation. During our presentation, I shared with the farmers a brief overview of the mechanics of climate change, the methane cycles in dry vs. flooded fields, and the UN’s approved methodology for calculating emission reductions.

But why is sustainable rice farming so important?

For one, rice is a daily staple for 3.5 billion people (19% of global dietary energy) and a livelihood for 1 billion. As the world’s population increases, so must rice production to meet food security needs. But not without an impact on climate change. Looking back in the past 50 years, GHG emissions from agriculture have doubled.

Rice farming accounts for 10% of the world’s emissions from methane, which is 25x more potent than CO2 in trapping heat in the atmosphere. In Philippines alone, rice farming accounts for 13% of GHG emissions, and all agriculture is responsible for 30% of emissions here. Thankfully the country is working towards meeting its commitment to reduce emissions by 70% by 2030.

AWD is a part of that effort. One hectare of flooded rice fields emits more than 30 tonnes CO2e per year. But by using AWD, field emissions are reduced by nearly 50%.

GHG mitigation isn’t the only benefit, but water conservation is significant as well. While rice occupies 30% of the world’s agricultural land, it uses 40% of irrigation. So using AWD to conserve water by 30% can make water available for household use, industry or more agriculture.

Sharing the same presentation mentioned above to a farmer group at St. Mark's Episcopal Church in Batal, Santiago, Isabela.