San Mateo is largely an agricultural economy. A total of 10,813.42 has. or 89.66% of the total land area of the municipality are devoted to agriculture. This is shown by the fact that about 90% of the population depends on agriculture as the main source of livelihood and income.The crops grown are rice, corn, munggo, high value commercial crops, and ornamentals. Poultry/Livestock and fish production are also practiced in the municipality.
Rice: Rice is its major crop. The municipality has a total area of 8,353 hectares of cropland devoted to rice production. Effective irrigated area totaled to 16,706 hectares, meaning there are two cropping in a year. The average annual production of palay is 125 cavans per hectare. As per data gathered, there is agri-equipment present in the municipality to facilitate rice production such as one (1) combine harvester, forty (40) and two (2) rice planter.
Corn:Corn is the secondary source of cereal requirements in the municipality. Area devoted to corn production is 653.50 hectares.There are two cropping per year having an annual average production of 140 cavans per ha.
Munggo: Munggo known to be as the Black Gold of San Mateo and the primary OTOP of the municipality. The alternative cropping of munggo as additional source of income of farmers during summer,has restored the fertility of the soil. A total of 7,385 has. landarea are devoted to munggo production.The average yield production is 800 kgs. per hectare.
High Value Commercial Crops: Numerous high value commercial crops are planted in the municipality for local consumption and for sale in nearby towns. Different vegetables like string beans (sitaw), okra, gabi, bitter ground, squash, eggplant, sweet potato and others are being planted by the farmers. Total land area for vegetable production is more or less 150 hectares. Fruit bearing trees like coconut, papayas, and mangoes are also planted in the area but mostly in home backyards. Several farmers go into large scale production like mangoes, coconut & bananas for market outside San Mateo.
Ornamentals: Brgy. Sinamar Norte in San Mateo is known for its ornamental cutflowers. Different variety of chrysanthemum and Baby’s breath are being grown here. People from San Mateo and other neighboring towns need not go to Baguio for their floral needs.
2. Livestock and Poultry Production
Livestock: The commonly raised livestock in the municipality are carabao, cattle, swine, and goat.As per data gathered, there are 3,938 raisers of different livestock with a total of 8,397livestock population which is specified as follows:
Number of Raisers and Livestock Population, CY 2013
1. Poultry: the commonly raised are chicken, duck and turkey. As per data gathered, there are 7,139 raisers of poultry production with the total of 65,113 poultry population which is specified as follows:
Duck raising is the secondary OTOP of the municipality. The dispersal of ducks to farmers brought forth another sprawling industry – the egg production.
3. Fish and Aquaculture Production
San Mateo is endowed with rivers and creeks which make aquaculture development very rich source of livelihood. As per data gathered, there are 124.60 has. of fishpond within the municipality. Eight (8) hectares of these are hatcheries, raising tilapia fingerlings. 284 MT is the average annual fish production.
Recent technological advancements have been employed to improve the culture of tilapia species and the introduction of prawn or “ulang”, pangasius and catfish industry.
4.Other Agricultural Activities:
5. Swine dispersal to the different RICs in the different barangays as well as goat dispersal projects.
6. Distribution of fruit bearing seedlings and vegetable seeds for backyard production purposes.
7. Organic Production thru vermi-composting of every barangays and other National Government Organizations.
8. Seminars on crop alternatives, peanut and root crops growing.
9. Programs on organic farming practice, native chicken & pig production and identification of compost producers.
10. Munggo Processing by the Rural Improvement Club members. Munggo products are butchi, empanada, munggopulvoron, pancitbalatong, chips, yema, coffee, and flour. These are already available in the market.
11. Salted Egg Industry by the Pag-Asa Bayanihan Association (PBA).