1. A BRIEF INTRODUCTION TO THE WUFFDA PROGRAM
LECTURE AND TURORIAL
FOR CHAPTER 21
FEED FORMULATION BASICS
POULTRY NUTRITION
AND FEEDING

2. Chapter 21
Section I.
INTRODUCTION

3. FORMULATION PROGRAM CAPABILITIES
SOLVE A SERIES OF EQUATIONS
MINIMIZE OR MAXIMIZE PARAMETERS
FEED COST
ANY NUTRIENT LEVEL

4. THE BASIC FEED FORMULATION PROBLEM
Chapter 21
Section I I.
THE BASIC FEED FORMULATION PROBLEM

5. EXAMPLE PROBLEM
CORN CONTAINS 8.8% PROTEIN, 3.43 Kcal / Kg & COSTS $15.33 PER 100 KG.
SOYBEAN MEAL CONTAINS 48.5% PROTEIN, 2.44 Kcal/Kg ME / Kg & COSTS $23.10 PER 100 KG
THE KG OF CORN PLUS THE KG OF SOYBEAN MEAL SHOULD EQUAL 100
THE FEED SHOULD CONTAIN EXACTLY 2.97 Kcal ME / Kg AND AT LEAST 23% PROTEIN

6. EXAMPLE PROBLEM QUESTION
WHAT IS THE LEAST EXPENSIVE COMBINATION OF CORN AND SOYBEAN MEAL THAT MEETS THESE RESTRICTIONS?

7. EXAMPLE PROBLEM QUESTION
WHAT IS THE LEAST – COST FORMULA THAT MEETS THESE REQUIREMENTS?

8. EQUATIONS TO SOLVE X = POUNDS OF CORN Y = POUNDS OF SOYBEANS
X + Y = 100
3.43 X Y ≥ 2.97 (100)
8.8 X Y = 23 (100)

9. A GRAPHIC SOLUTION TO THE BASIC PROBLEM
Chapter 21
Section III.
A GRAPHIC SOLUTION TO THE BASIC PROBLEM

10. GRAPHICAL SOLUTION

11. GRAPHING TO FIND SOLUTIONS FOR 2 INGREDIENTS AND 2 NUTRIENTS IS POSSIBLE
MORE NUTRIENTS OR INGREDIENTS MAKES THE SOLUTION VERY DIFFICULT TO FIND
COMPUTER PROGRAMS, LIKE EXCEL AND SEVERAL COMMERCIAL PRODUCTS, MAKE LEAST-COST FEED FORMULTION FEASABLE WITH MANY INGREDIENTS AND NUTRIENTS

12. A LINEAR PROGRAMMING SOLUTION TO THE BASIC PROBLEM
Chapter 21
Section IV.
A LINEAR PROGRAMMING SOLUTION TO THE BASIC PROBLEM

13. WUFFDA WUFFDA IS A WORKBOOK THAT RUNS IN MICROSOFT EXCEL
WUFFDA WAS DESIGNED FOR 25 INGREDIENTS AND 34 “NUTRIENTS”
“NUTRIENTS” INCLUDE THINGS LIKE DRY MATTER, NUTRIENT RATIOS & INGREDIENT CATEGORIES (LIKE FORAGES, CONCENTRATES, & ANIMAL PROTEIN PRODUCTS).

14. THE PROGRAM OPENS ON THE TITLE PAGE

17. ENTER FEED COMPOSITION, COST AND LIMITS DATA IN THIS WINDOW
CLICKING ON THE INGREDIENTS TAB OPENS THE INGREDIENT COMPOSITION MATRIX.
ENTER FEED COMPOSITION, COST AND LIMITS DATA IN THIS WINDOW
DATA CAN BE STORED ON THE BOTTOM OF THE PAGE (NOT VISIBLE) AND RECALLED LATER WHEN NEEDED

18. CLICKING ON THE NUTRIENTS TAB OPENS THE WINDOW FOR NUTRIENT LIMITS
ENTER NUTRIENT REQUIREMENT AND TOXICITY DATA IN THIS WINDOW
DATA CAN BE STORED ON THE RIGHT OF THE PAGE AND RECALLED LATER WHEN NEEDED

19. CLICKING ON THE FORMULATE TAB OPENS THE MAIN FEED FORMULATION WINDOW
MAKE NO CHANGES IN THIS WINDOW!

20. CLICKING ON THE GRAPHS TAB OPENS A WINDOW SHOWING HOW NUTRIENT LEVELS COMPARE TO REQUIREMENTS

21. CLICKING ON THE FEED SPEC TAB OPENS A WINDOW DESIGNED FOR PRINTING FORMULA DETAILS
THE TOP OF THIS PAGE SHOULD BE CUSTOMIZED WHEN PRINTING WITH THE NAME OF THE FEED AND ANYTHING ELSE YOU WOULD LIKE TO ADD

22. CLICKING ON THE MIXING SHEET TAB OPENS A WINDOW DESIGNED FOR PRINTING SPECIFIC AMOUNTS OF A FEED TO BE MIXED
THE TOP OF THIS PAGE SHOULD BE CUSTOMIZED WHEN PRINTING WITH THE NAME OF THE FEED AND ANYTHING ELSE YOU WOULD LIKE TO ADD

23. THE OTHER TABS LEAD TO SPREADSHEETS WITH STORED DATA THAT CAN BE TRANSFERRED TO THE INGREDIENT COMPOSITION SPREADSHEET

24. PROCEEDURES A. THE BASIC PROBLEM
Chapter 21
Section V.
PROCEEDURES
A. THE BASIC PROBLEM

25. SOYBEAN MEAL FOR INGREDIENT 2
TYPE IN:
CORN FOR INGREDIENT 1
SOYBEAN MEAL FOR INGREDIENT 2
ENERGY FOR NUTRIENT 1
&
PROTEIN FOR NUTRIENT 2

27. ADD THE NUTRIENT VALUES AND COST FOR EACH INGREDIENT

28. ADD THE LIMITS FOR NUTRIENTS ON THE NUTRIENTS SPREADSHEET

29. TO SOLVE THE ENTERED PROBLEM, GO TO THE FORMULATE SPREADSHEET AND CHOOSE “TOOLS”,
“SOLVER” AND ”SOLVE”

30. THE WUFFDA PROGRAM HAS A SERIES
OF EQUATIONS AND INEQUALITIES ALREADY ENTERED
MASH THE SOLVE BUTTON

31. OOPS!
WHAT HAPPENED?

32. THE PROGRAM TRIED TO FIND A SOLUTION WITH ZEROS FOR MAXIMUMS

33. INSERT 100 FOR THE MAXIMUMS ON THE INGREDIENTS SPREADSHEET

34. AND ON THE NUTRIENTS SPREADSHEET

35. FROM THE FORMULATE SPREADSHEET, CHOOSE:
TOOLS
SOLVER
& SOLVE, AGAIN
AND NOW IT SHOULD WORK!

36. RESULTS ARE DISPLAYED ON THE FORMULATE SPREADSHEET

37. AND ON THE FEED SPEC SPREADSHEET

38. AND ON THE GRAPHS SPREADSHEET

39. PROCEEDURES B. ADDING INGREDIENTS TO THE FORMULATION
Chapter 21
Section V.
PROCEEDURES
B. ADDING INGREDIENTS TO THE FORMULATION

40. ENTER NEW INGREDIENTS ON THE INGREDIENT SPREADSHEET

41. WHEN YOU GET AN OPTIMAL SOLUTION,
GO TO THE “FEED SPEC” WINDOW
YOU MAY GIVE THIS FEED A UNIQUE NAME, SOMETHING OTHER THAN “EXAMPLE FEED”, AND PRINT YOUR RESULTS

42. PROCEEDURES C. THE COST OF FEED RESTRICTIONS
Chapter 21
Section V.
PROCEEDURES
C. THE COST OF FEED RESTRICTIONS

43. BEFORE MAKING ANY CHANGES, COPY THE % CORN,% SOYBEAN MEAL, & FORMULA COST TO THE CHAPTER 21 WORKSHEET, PAGE 21-9

44. CHANGE THE MAXIMUM PROTEIN LEVEL FROM 23 TO 100

45. AFTER SOLVING THE PROBLEM WITH NO MAXIMUM ON THE AMOUNT OF PROTEIN, AGAIN COPY THE % CORN,% SOYBEAN MEAL, AND FORMULA COST TO THE CHAPTER 21 WORKSHEET, PAGE 21-9
DO THE SAME AFTER YOU’VE CHANGED THE COSTS OF THE CEREALS

46. PROCEEDURES D. ADDING NUTRIENTS TO THE FORMULATION
Chapter 21
Section V.
PROCEEDURES
D. ADDING NUTRIENTS TO THE FORMULATION

47. ENTER NEW NUTRIENT DATA ON THE INGREDIENT COMPOSITION SPREADSHEET

48. AND ADD NUTRIENT RESTRICTIONS ON THE NUTRIENTS SHEET & PRINT YOUR RESULTS

49. FEED FORMULATION BASICS
Print your formulations’ Feed Specification sheet
Attach the print out to the Chapter 21 Worksheet and hand it in when all 4 lessons are complete.