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Crop Production and Management - Food from Animals and Animal Husbandry

Grade 8CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Animal Husbandry: The branch of agriculture concerned with the breeding, feeding, and care of livestock for human use is called animal husbandry. It involves large-scale management of animals like cattle, sheep, and poultry.

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Food Sources: Animals provide us with food products such as milk (from cows, buffaloes, goats), eggs (from poultry like hens and ducks), meat (from goats, sheep, and fish), and honey (from honeybees).

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Dairy Farming: Managing animals for milk and its products. Milk is rich in proteins, fats, and minerals like Calcium (CaCa).

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Poultry Farming: Rearing birds like chickens and ducks for eggs and meat. Birds raised for meat are called 'broilers', while those raised for eggs are called 'layers'.

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Pisciculture: The production and management of fish on a large scale. Fish is a major source of animal protein and is rich in Vitamin AA, Vitamin DD, and iodine.

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Apiculture: The practice of keeping and rearing honeybees for the production of honey and beeswax. Honey is used as a natural sweetener and has medicinal properties.

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Nutritional Value: Animal-derived foods are often rich in essential amino acids and vitamins, such as Vitamin B12B_{12}, which are generally absent or low in plant-based foods.

📐Formulae

Feed Conversion Ratio (FCR)=Total Feed IntakeTotal Weight Gained\text{Feed Conversion Ratio (FCR)} = \frac{\text{Total Feed Intake}}{\text{Total Weight Gained}}

Composition of Honey≈80% Sugars+17% H2O+3% Minerals and Vitamins\text{Composition of Honey} \approx 80\% \text{ Sugars} + 17\% \text{ } H_2O + 3\% \text{ Minerals and Vitamins}

Cattle Feed=Roughage (high fiber)+Concentrates (high protein/minerals)\text{Cattle Feed} = \text{Roughage (high fiber)} + \text{Concentrates (high protein/minerals)}

💡Examples

Problem 1:

A poultry farmer wants to improve the quality of egg production. Which category of birds should he focus on, and what nutrient is essential for the shells?

Solution:

The farmer should focus on layers. For strong eggshells, the diet must be supplemented with Calcium (CaCa).

Explanation:

Layers are birds reared specifically for egg production. Since eggshells are primarily composed of Calcium Carbonate (CaCO3CaCO_3), a deficiency in CaCa leads to thin-shelled or soft eggs.

Problem 2:

Why is cod liver oil often recommended for people living in regions with low sunlight?

Solution:

Cod liver oil is a rich source of Vitamin DD.

Explanation:

Vitamin DD is synthesized by the human body in the presence of sunlight. In regions with low sunlight, fish-derived products like cod liver oil provide the necessary Vitamin DD and Vitamin AA to maintain bone health and immunity.

Problem 3:

Classify the following based on their source: Honey, Beef, Milk, and Cod liver oil.

Solution:

Honey →\rightarrow Apiculture; Beef →\rightarrow Livestock/Cattle; Milk →\rightarrow Dairy farming; Cod liver oil →\rightarrow Pisciculture.

Explanation:

Each food item corresponds to a specific branch of animal husbandry based on the animal species involved (Bees, Cattle, or Fish).