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PEARSON SQUARE Balancing a Ration

PEARSON SQUARE Balancing a Ration. Develop a basic knowledge of a well-balanced ration for each class of livestock Select and determine values of feeds Formulate several rations using the Pearson square or a computerized program. Objectives.

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PEARSON SQUARE Balancing a Ration

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  1. PEARSON SQUARE Balancing a Ration

  2. Develop a basic knowledge of a well-balanced ration for each class of livestock • Select and determine values of feeds • Formulate several rations using the Pearson square or a computerized program Objectives

  3. Useful tool for simplifying and balancing of rations • It shows the proportions or percentages of two feeds to be mixed together to give a percentage of the needed nutrient Pearson Square

  4. 2000# of feed is needed to feed a 100# growing hog. • A feeding standards table shows that an 18% crude protein ration is needed. • Corn and Soybean Meal (SBM) are selected as feeds. Pearson Square

  5. A feed composition table shows Corn has 8.9% crude protein SBM has 44.4% crude protein Pearson Square

  6. How much corn and soybean meal need to be mixed together for 2000# of feed? Pearson Square

  7. Step 1 -Draw a 1- to 2-inch square. Place diagonal lines across the square. Pearson Square

  8. Step 2 – Write the percentage of crude protein needed by the animal in the center of the square where the diagonal lines cross 18.0 Pearson Square

  9. Step 3 –Write the feeds to be used at each corner. Place the percent of crude protein in the feeds after the name of the feed • Corn • 8.9% • SBM • 44.4% 18.0 Pearson Square

  10. Step 4 – Subtract the smaller of the numbers from the larger numbers. (This involves crude protein needed by the animal and that provided by the feed.) Write the difference in the opposite corners • Corn 26.4 parts 8.9 % corn • SBM 9.1 parts • 44.4% SBM 18.0 Pearson Square

  11. Step 5 – The numbers at the two right corners are parts of the two feed ingredients that are needed. • 26.4 parts corn • +9.1 parts soybean meal (SBM) • 35.5 total parts Pearson Square

  12. Corn 26.4 parts corn • 8.9% 35.5 total parts • SBM 9.1 parts SBM • 44.4% 35.5 total parts 18.0 Pearson Square

  13. Step 6 – The percentage of each feed needed in the ration can be found by dividing the number of parts by the total parts, then multiply by 100. • 26.4/ 35.5 = .744 x 100 = 74.4% corn • 9.1/ 35.5 = .256 x 100 = 25.6% sbm Pearson Square

  14. Corn 26.4 parts corn • 8.9% 35.5 total parts 74.4% • SBM 9.1 parts SBM • 44.4% 35.5 total parts 25.6% 18.0 Pearson Square

  15. Step 7 – The amount of each feed ingredient for a large batch of feed is determined by multiplying the percentage of each by the total amount of feed desired Pearson Square

  16. Our batch of feed = 2000 # ( 1 ton) • 2000# x .744 = 1488 # Corn • 2000# x .256 = 512 # SBM 2000# of feed @ 18% Crude Protein Pearson Square

  17. Develop a basic knowledge of a well-balanced ration for each class of livestock • Select and determine values of feeds • Formulate several rations using the Pearson square or a computerized program Review Objectives

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