Question

Arrange the following feed ingredients according to their crude protein content in ascending order:
(A). Fish meal
(B). Wheat bran
(C). Groundnut cake
(D). Corn grains
Choose the correct answer from the options given below:

• A. (A), (B), (C), (D)
• B. (D), (B), (C), (A)
• C. (D), (C), (A), (B)
• D. (C), (B), (D), (A)

Hint:

To remember feed protein content, group them into categories:
- Energy concentrates (Cereals) \(\rightarrow <12\%\) CP.
- Milling by-products \(\rightarrow 12\text{-}20\%\) CP.
- Plant protein supplements (Oil cakes) \(\rightarrow 30\text{-}50\%\) CP.
- Animal protein supplements (Fish/Meat meals) \(\rightarrow >60\%\) CP.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
To arrange these feed ingredients in ascending order of their crude protein (CP) content, we must analyze the typical nutritional profiles of common energy sources, milling by-products, oil cakes, and animal protein supplements.

Step 2: Detailed Explanation:
Let us identify the typical crude protein percentages of each feed ingredient:

(D). Corn grains: Maize/corn is a primary energy source (cereal grain). It is rich in starch but relatively low in protein, with a typical crude protein content of approximately8% to 10%.

(B). Wheat bran: This is a milling by-product consisting of the outer layers of the wheat kernel. It contains moderate levels of protein and fiber, with a typical crude protein content of approximately14% to 16%.

(C). Groundnut cake: This is a high-quality, plant-based protein supplement obtained after oil extraction from groundnut seeds. It has a high protein content, typically ranging between40% and 45%.

(A). Fish meal: This is a premium animal protein supplement manufactured by drying and grinding whole fish or fish trimmings. It has an exceptionally high protein content with an excellent amino acid profile, typically ranging between60% and 70% crude protein.
Arranging these values in ascending order (from lowest to highest protein content): \[ \text{Corn grains (8-10\%)} < \text{Wheat bran (14-16\%)} < \text{Groundnut cake (40-45\%)} < \text{Fish meal (60-70\%)} \] This corresponds to the sequence: (D), (B), (C), (A).

Step 3: Final Answer:
The correct option is (B).