During ensiling and feed-out there is a loss of nutrients from the crop. The losses, which can be very high, are related to dry-matter content of the crop, type of crop being ensiled and storage system used. The amount of bad silage farmers manually discard is usually fairly small, but the invisible losses where the dry matter disappears as CO2 and heat can exceed 15% in bunker silos. With good management and techniques the losses can be below 5%. On the webinar Rolf Spöndly talks about dry matter losses during silage-making, what the losses depend on, and techniques that reduce dry matter loss. Afterwards Elisabet Nadeau talks about the biological factors that have an effect on losses from different crops and how losses are reduced by use of additives. The recording is available to watch back here: