Corn silage making season will soon be upon us. It is important to take the time to communicate with employees proper protocols while making silage, along with safe practices around silage piles or silos. A few years ago, I had the privilege to travel with Keith Bolsen, professor emeritus for Kansas State University, for the I-29 Moo University Winter Workshops as we discussed forages. Dr. Bolsen shared some great points with attendees not only on making great silage but also how to stay safe around silage. Professor Bolsen stressed these main areas to consider concerning silage safety.

Safety Considerations

EQUIPMENT

Tractor roll-over’s are a leading cause of accidents and deaths on farms. Due to the steep nature of the piles or the sheer walls that exist on bunkers extra precaution is needed when operating tractors while packing the silage pile. To help with the steep nature of silage piles the recommendation is to utilize a 1 to 3 slope on ends and sides of drive over piles. Tractors should also be backed up piles to help tractors from flipping over backwards on steep slopes. It is suggested to put lighting or rails above the walls on silage bunkers to provide an indication for the location of the edge of the wall. Next is the lack of employees utilizing the safety belt when operating the tractor which causes them to be thrown from the tractor potentially being crushed in a roll-over. Tractors should also be equipped with R.O.P.S. (roll-over-protective structures) which help provide a protective barrier around the person operating the equipment.

FALL PREVENTION

Falls are another source of injury or death around silage piles. It can occur when climbing up the silo, falling off the side of the bunker, or face of a pile. Make sure all guard rails are properly installed on silo ladders and chutes are in good repair prior to accessing them. Workers need to utilize good practices when there is slippery conditions or wet weather. Care should be taken when removing tires and tarps covering the pile, making sure not to get too close to the edge and fall off. Other types of falls have occurred when employees have slipped out of the bucket of the pay loader trying to access the face of a pile.

PILE AVALANCHES

GASSES AND MOLDS

When first accessing silos, bunkers and piles be aware of toxic gases that are produced during the fermentation process. Silos typically have the highest risk of these gases being concentrated although they can occur in all types of silage fermentation. These gases include nitric oxide (NO), nitrogen dioxide (NO₂) and nitrogen tetroxide (N₂O₄). These gases are toxic and often fatal when inhaled. Typically, the greatest concentration of these gases occurs during the fermentation process in the first 3 weeks after completion of filling the silo. Once a silo is opened for the first time run the silage blower for 20-30 minutes and wear a respirator before entering the confined space. Precaution should also be taken when opening bunkers or piles for the first time as they are also tightly-sealed and gases can concentrate under the tarps.

INSIDE THE SILO

As producers enter a confined space they should be tethered to a rope or harness, which a person outside of the silo can use to pull the person out of a silo in emergency situations. The “lock-out-tag-out” system should be engaged so that the blower is not accidentally turned on by someone outside the silo if maintenance or repair is being performed inside the silo.

In Summary

Communicating and training all workers on proper safety protocols for handling and accessing silage is essential to minimize the risk of accidents. Additional access to proper safety equipment simultaneously, such as reflective vests, eye protection and breathing equipment when needed is equally important. Lead by example and do not be afraid to correct improper worker performance, if they are not following established safety protocols, you may save a life!