We use cookies on our website to track and enhance your user experience. For more information or to update your cookie settings, please refer to our privacy policy.

Accept Decline

How we calculated your clamp silage stocks

Example calculation based on the following:

  • Clamp silage dimensions (L x W x H) = 40 x 15 x 2 metres
  • Silage DM = 30%
  • 100 cows eating 35 kg fresh silage per cow per day

Step 1: Calculate the volume (m3) of silage dry matter in the clamp.

Silage fresh matter = 40 x 15 x 2 = 1,200 m3.

Step 2: Convert this into kg silage DM using the table.

Calculating stock levels

For a 2 metre high clamp of 30% DM grass silage the average DM density is 185 kgDM/m3.

Clamp contains 1,200 x 185 =222,000 kg DM = 222 tonnes DM.

Step 3: Calculate daily silage DM requirements for the herd:

= Number of cows x daily fresh silage intake per cow x 30/100
= 100 x 35 x 30/100 = 1,050 kg = 1.05 t silage DM per day required.

Step 4: Calculate how many days of silage you have in stock.

= tonnes silage DM/silage DM requirements per day = 222/1.05 = 211 days

Back to top