1. What Is Total Mixed Ration?

Total Mixed Ration (TMR) is a method of feeding dairy and beef cattle that combines all feed ingredients into a single mix. The TMR calculation on a dry matter basis ensures accurate nutrient delivery and balanced animal nutrition.

2. How Does The Calculator Work?

The calculator uses the TMR formula:

Where:

• \( TMR \) — Total Mixed Ration (kg DM)
• \( Ingredient_i \) — Weight of each ingredient (kg)
• \( \%DM_i \) — Dry matter percentage of each ingredient (%)

Explanation: The formula calculates the total dry matter content by summing the product of each ingredient's weight and its dry matter percentage.

3. Importance Of TMR Calculation

Details: Accurate TMR calculation is essential for proper animal nutrition, cost-effective feeding programs, and maintaining optimal herd health and productivity.

4. Using The Calculator

Tips: Enter the weight of each ingredient in kilograms and their corresponding dry matter percentages. All values must be valid (weights ≥ 0, DM percentages between 0-100%).

5. Frequently Asked Questions (FAQ)

Q1: Why calculate TMR on dry matter basis?
A: Dry matter basis eliminates moisture variation, allowing for accurate nutrient comparison and consistent feeding across different feed types.

Q2: What are typical DM percentages for common feeds?
A: Haylage (40-60%), Corn silage (30-35%), Dry hay (85-90%), Grains (85-90%), Protein supplements (88-92%).

Q3: How often should TMR be calculated?
A: TMR should be calculated whenever feed ingredients change, and regularly monitored to ensure consistent nutrient delivery.

Q4: What factors affect DM percentages?
A: Harvest timing, storage conditions, weather, and processing methods can all influence dry matter content of feed ingredients.

Q5: Can I add more than 3 ingredients?
A: For more complex rations, repeat the calculation process for additional ingredients and sum all results for total TMR.