1. Three examples of feedstuff commonly used in agriculture are:
a) Corn: Corn is a widely used feedstuff for animals, providing energy, carbohydrates, and some protein.
b) Soybean Meal: Soybean meal is a byproduct of soybean oil extraction and is an excellent source of protein in animal feed.
c) Alfalfa: Alfalfa is a legume that is often used as a forage crop for livestock due to its high protein content and nutrient profile.
2. Animals need feed for several reasons:
a) Energy: Feed provides animals with the necessary energy for growth, reproduction, and physical activities.
b) Nutrients: Animals require a variety of nutrients such as proteins, carbohydrates, fats, vitamins, and minerals to maintain proper bodily functions and support growth and development.
c) Maintenance: Animals need feed to maintain their body weight, repair tissues, and support basic metabolic processes.
d) Production: Livestock animals, such as dairy cows and laying hens, require specific nutrients in their feed to support milk production and egg laying.
3. A sketch of a well-structured soil component can be represented as follows:
| Soil Profile |
| Soil Horizons |
| O Horizon (Organic) |
| A Horizon (Topsoil) |
| B Horizon (Subsoil) |
| C Horizon (Parent |
| Material) |
In this sketch, the soil profile is shown as a vertical section of the soil, displaying the different soil horizons. The O horizon represents the organic layer consisting of decomposed plant material. The A horizon is the topsoil, rich in organic matter, nutrients, and microorganisms. The B horizon is the subsoil, which may contain some nutrients leached from the topsoil. The C horizon represents the parent material, which is the layer from which the soil is derived.
Note: The sketch is a simplified representation of a soil profile and may not capture the exact characteristics of every soil type.
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