Roughage of cattle feed mainly contains_______________while_________________of cattle feed is rich in nutrients.

Answer

**Step-by-Step Text Solution:**

1. **Understanding Roughage in Cattle Feed:**
- Roughage primarily consists of fibrous materials that are not easily digestible by humans. These materials include items like nut shells and the outer coats of grains such as wheat.
- The significance of roughage lies in its ability to aid digestion in cattle due to the presence of specific bacteria in their digestive systems that can break down these fibrous components.

2. **Identifying the Nutrient-Rich Component:**
- In contrast to roughage, there is another component of cattle feed known as "concentrates."
- Concentrates are rich in nutrients, particularly proteins, which are essential for providing energy and supporting growth in cattle.

3. **Filling in the Blanks:**
- Based on the information gathered, we can fill in the blanks in the question:
- Roughage of cattle feed mainly contains **fibers** while **concentrates** of cattle feed is rich in nutrients.

**Final Answer:**
Roughage of cattle feed mainly contains **fibers** while **concentrates** of cattle feed is rich in nutrients.

---