Q: With summer approaching, I want to be sure I’m prepared to minimize unpleasant odors on my farm that are always worse during the warmer months. What can I do to eliminate those odors or prevent them altogether?

A: During the warm season horse properties can develop odors—between muddy turnouts, stockpiled manure, and urine buildup in confinement areas. These spots attract pests such as flies and rodents and can raise concerns among neighbors. Inhaling ammonia in stalls, barns, or confined spaces can also harm a horse’s respiratory tract. Here are five tips to help you reduce odors on your horse property.

1. Start With Healthy Soil

Odor control starts with a step many people overlook: Start with healthy soils and slightly sloped ground. If you confine horses in a low, wet area you will end up with mud and odor problems. Make sure you have a good, even slope (about 1-2%) away from stalls or shelters. Be sure to grade the ground, making it even before putting gravel or another type of footing in these areas. Otherwise, any depressions in the underlying soil allow water (and urine) to pool under the gravel, potentially causing odors.

2. Develop a Manure Management Program

A solid manure management program goes a long way in solving odor issues. Begin by picking up manure every one to three days in confinement and high-traffic areas. Establish your manure pile far away from streams, ditches, rivers, or other bodies of water to prevent runoff contamination, and cover it with a tarp (to keep it from getting soaked by rain).

Let’s say you’ve picked up manure and you still have odors. The simplest and cheapest solution might be to drag or harrow the paddock. This helps get beneficial aerobic microbes back in your soil that break down tiny, odor-causing organics. It also helps the ground dry faster.

3. Minimize Moisture

Keep your farm as dry as possible by removing opportunities for standing water to form. Keeping shelters, stalls, and barns dry, or at least well-drained, goes a long way in reducing odors. Moisture often triggers odor problems; wet areas release more odor-causing compounds than dry ones. Consider doors, screens, or roof overhangs for shielding barn openings from rain. Invest in good working gutters and downspouts, which divert rainwater away from buildings and confinement areas. Ventilation also helps dry the barn area by releasing and not trapping moisture and allowing odors to dissipate. Stall windows, open doorways, cupolas and vents in roofs, ceiling fans, etc., can all improve ventilation in your barn.

If a horse perpetually urinates in one spot in a confinement area, you might have to occasionally dig out and refresh footing in that spot to help it dry thoroughly.

4. Use Microbial Sprays to Minimize Odors

A variety of microbial spray products are available, which you can use on urine spots and across confinement areas to neutralize odors. These products contain different types of beneficial bacteria, enzymes, and/or fungi. They come in highly concentrated solutions that you dilute and spray on paddock areas with a garden sprayer. The beneficial microbes break down ammonia and organic material that cause odors and attract flies. Use these animal-safe solutions as often as needed to control odors. You can commonly find these beneficial microbial sprays at organic garden supply companies or feed stores.

5. Use Zeolite Products in Stalls

Zeolite products remove odors effectively when you sprinkle them in stalls or other areas of your barn. These naturally occurring minerals have a highly porous structure, which binds with ammonia molecules in urine, eliminating odors. You’ll find zeolite, which looks like finely ground kitty litter, in several stall deodorizer products.

Take-Home Message

Starting with healthy soil, developing a manure management program, minimizing moisture, and using microbial sprays and zeolite products can all help reduce the odors on your horse farm. In turn, this will minimize pests and support your horses’ comfort and well-being.