Philippine Farmer Says, Organic Fertilizer Increased Rice Yield by 20%

organic fertilizer

Bernardo Calilung, a medical technologist farming rice in Brgy. Amucao, Tarlac, Tarlac with 19.48 hectares of irrigated land, started in 1998 in conventional rice farming using chemical fertilizers and pesticides. He began organic farming in 2010 through the Science and Technology-Based Farm Project supported by the Philippine Council for Agriculture, Aquatic and Resources Research and Development (PCAARRD) of the Department of Science and Technology.

In the book “Organic Agriculture Technologies and Systems Developed and Adapted by Farmers in the Philippines,” authored by Dr. Oscar Zamora and Dr. Blesilda Calub and published by the Department of Agriculture-Bureau of Agricultural Research (DA-BAR) and the University of the Philippines Los Baňos-College of Agriculture in 2016, it was reported that Bernard Calilung increased his rice yield by 22% (from 97.6 cavans/hectare [ha] to 125.4 cavans/ha) with organic farming using vermicompost as fertilizer and vermicompost tea for pest control compared to conventional farming.

Here are some of the benefits an organic fertilizer does to the soil

Organic soil:

  • Holds and retains water more efficiently than non-organic soil
  • Is nutrient-rich
  • Has a healthy soil texture
  • Is resistant to soil pathogens that can harm plants
  • Deters soil-borne pests
  • Needs less (if any) additional fertilizers, pesticides, and herbicides
  • Produces naturally strong and healthy plants that are better able to ward off pests and diseases
  • Now, not many urban and suburban yards and gardens are similar to a forest, so we organic gardeners have to create a schedule of regularly adding organic materials to our soil in order to mimic Mother Nature. The best thing an organic gardener can do to achieve this is to start a compost pile. Throw in your yard waste and kitchen scraps, and add chicken droppings if you have a little urban farm. Toss in your lawn clippings rather than bag them, and include other materials like hay, straw, fallen leaves, and bark. Avoid adding diseased plants or weeds recently pulled from your garden, as these can spread pathogens and seeds into next year’s garden.

Organic inputs from African Night Crawler application per hectare

Calilung produces vermicompost with the “African night crawler” (Eudrilus eugeniae) using crop and animal wastes in his farm. He applies 12 bags of vermicompost (50 kg/bag) per ha at land preparation and sprays vermi tea (water extract of vermicompost) at 200 millimeters per 16 liters of water every two weeks from transplanting of rice seedlings until panicle initiation. He advises that spraying should be done early in the morning (before 9 AM) or late in the afternoon (after 4 PM).

How Organic fertilizer from worm poop benefits the soil in two ways?

The organic fertilizer from worm castings is an excellent soil booster. There are two ways it gives benefits to the soil.

  • It increases the population of beneficial organisms in the soil (clay-loam to sandy-loam) and
  • It enhances the water-holding capacity of the soil due to build up of organic matter.

Using Organic foliar and insecticide spray from vermicompost

Vermi tea, on the other hand, has plant nutrients (major and minor elements) and micro organisms like chitinolytic bacteria that produce chitinase, which is a good insect repellant.

Using vermicompost and vermi tea (instead of chemicals), Calilung observed that there was an increase of 20.8 tillers per rice plant that was 7% higher than that with conventional farming. There was also less incidence of pollen abortion with the organic farming practices compared with the conventional, and an increase in grain weight of 4 kg per cavan of harvest because of “the heavier and more filled grains.”

Cost of production is less with organic fertilizers

Moreover, by doing away with chemicals, Calilung believes that his cost of production has been lowered in addition to producing high quality rice and protecting the environment.

Calilung was cited by the Land Bank of the Philippines as one of its “Harvest Heroes” in 2010. As a member of the Amucao Seed Growers’ Agro-Industrial Cooperative, he has been sharing his organic farming practices with other farmers. He is also a Farmer-Scientist of the PCAARRD.

With Calilung’s experience, the provincial government of Tarlac has undertaken a province-wide technology promotion and adoption of vermicomposting. The Central Azucarera de Tarlac, which operates a sugar mill, has encouraged sugarcane farmers of the province to produce sugarcane-based vermicompost and vermi tea.