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Self Test – Timed Answer Reveal

5.1 – Self-test – Short Answer

Scenario: A farmer goes to feed his cows. The silage results show a dry matter content of 45% and 900 kg of dry matter. He plans to feed each cow 40 kg of silage.

  • Heavy rain reduces dry matter content to 40%.
  • Weighing system overestimates weight by 10%.
  • 5% residual feed is not counted.

Questions:

  1. What does the farmer assume about cow intake (FUM)?
  2. What is the actual FUM intake per cow?

Assumed FUM:
40 kg × 45% DM = 18 kg DM
18 × 900 FUM/kg DM = 16,200 FUM

Actual FUM:
40 kg − 10% = 36 kg
36 × 40% DM = 14.4 kg DM
14.4 − 5% residual = 13.68 kg DM
13.68 × 900 = 12,312 FUM

Conclusion: Nearly 4,000 FUM less, potentially reducing milk yield by 8 L/cow/day.