NIA push yielding results: Adjusted planting calendar boosts yields, cuts climate risks

MANILA, Philippines — The National Irrigation Administration (NIA) is beginning to see tangible results from its push to realign farming practices with the country’s changing climate; delivering higher yields, improved water efficiency and reduced exposure to typhoon-related losses.

First articulated in 2024, the strategy centers on a simple but critical adjustment: shifting planting calendars and maximizing dry-season cropping to avoid peak storm periods and take advantage of more stable growing conditions. Early outcomes from areas adopting these practices have shown measurable gains.

“This is about working with the realities on the ground,” said NIA administrator Eddie Guillen, an engineer by profession who also hails from an agricultural region.

“When we align planting schedules, water availability, and climate conditions, we can reduce losses and improve productivity at the same time.”

Quick turnaround, second crop

The Philippines loses an estimated 500,000 to 600,000 metric tons of palay annually due to typhoons and flooding that often occur during traditional harvest periods, particularly between September and October.

To address this, NIA began promoting a shift in planting schedules; encouraging farmers to plant in October to November so that harvests fall in January to February, outside peak typhoon months.

This adjustment allows farmers, particularly in irrigated areas, to quickly turn around and plant a second crop within the same year—a practice known as quick turn-around (QTA).

Under this approach, a second crop may be harvested by May to June, before the height of the rainy season.

“Such volume could be saved if farmers were to adjust planting schedules and avoid the typhoon window,” Guillen said. “At the same time, they can produce more by completing two cropping cycles within a more favorable period.”

The agency has pushed for the use of double dry-season cropping systems, allowing farmers to complete more than one planting cycle within periods of favorable weather and stronger sunlight conditions.

These gains are made possible by irrigation infrastructure, which enables farmers to move beyond reliance on rainfall alone.

Increased cropping intensity

By 2025, the combined approach of adjusted planting schedules and increased cropping intensity, supported by improved water management, had begun to deliver results.

Reports from implementation areas point to higher palay yields supported by more stable growing conditions, as well as increased cropping intensity.

Dry-season planting, in particular, has shown yield advantages of 0.5 to 1.5 metric tons per hectare, driven by better sunlight exposure and controlled irrigation.

Water efficiency and climate-smart practices

Beyond adjusting planting schedules, NIA has also expanded the use of Alternate Wetting and Drying (AWD), a water-saving irrigation method that allows farmers to reduce water usage while maintaining or improving yields.

AWD enables farmers to use up to 30% less water, allowing irrigation systems to serve more land while lowering production costs. The method also promotes deeper root growth, improved nutrient absorption, and stronger crop resilience.

In some cases, the use of AWD has also opened opportunities for farmers to access carbon credits, reflecting the growing role of climate-smart agriculture in the sector.

Resilience under stress: the UPRIIS case

The impact of these combined strategies has been particularly evident in large irrigation systems such as the Upper Pampanga River Integrated Irrigation System (UPRIIS).