Agricultural Science (All Classes)

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BASIC ECONOMIC PRINCIPLES

The following economic concept explains the behavior of consumers of agricultural goods. These concepts or elements includes. Wants: this is the desire or needs of man to own goods and services that give satisfaction. These wants are insatiable because the resources needed to cater for them are limited (in short supply). The basic need or […]

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SEED RATE – WELL EXPLAINED

Seed rate is the amount of seeds to be planted in a given unit area governed by ultimate crop stand which is desired. The objective of correct spacing of crop is to obtain the maximum yields from a unit area without sacrificing quality. Most crops are seeded at lighter rates under drier conditions than under

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BEST NURSERY PRACTICES

Planting materials are either planted directly in a seedbed or indirectly through a nursery bed. A seedbed is a piece of land which could be small or large and prepared to receive planting materials. A nursery bed on the other hand is a small plot of land specially prepared for raising seedlings or planting materials

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TYPES OF NURSERIES – VEGETABLE, TREE, GRAFTING

Nurseries: We have different types of nurseries and they are vegetable nurseries, tree nurseries, grafting nurseries and layering nurseries. The types of nurseries are well explained below. Categories of nurseries: Vegetable Nursery: They are used for raising the seedlings of vegetable crops. Tomatoes, cabbages, kale, onions, brinials and peppers. Vegetable Propagation Nurseries: They are used

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VEGETABLES

Introduction A vegetable is any crop that is grown and eaten fresh. Vegetables are important both for nutritional and commercial reasons. They are categorized on the basis of the part used as food. Such parts include; Leaves, Stems, Roots, Fruits, Flowers, Pods Vegetables are grouped into the following categories: Leaf vegetables  for example kales and

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VEGETATIVE MATERIALS

These are plant parts which have the ability to produce roots, they grow and develop in to new plants. Plant parts such as leaves, roots or stems can be used for planting as long as they are capable of rooting. Advantages of using vegetative materials for planting. Crops originating from vegetative materials matures faster than

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SELECTION OF PLANTING MATERIALS

When selecting materials for planting the following factors must be considered: Suitability to the ecological conditions The selected planting materials should be well adapted to the soil conditions, temperatures and amount of rainfall in the area. There are many varieties of maize, for example, which are suitable to different ecological conditions. Hybrid 622f or example

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CROP SPACING – WELL DETAILED

It is the distance of plants between and within the rows. Correct spacing for each crop has been established as shown in table below. Crop Maize (Kitale) hybrids spacing 75-90 cm x 23—30 cm Crop Coffee (Arabica) tall varieties spacing 2.75 cm v 2.75 m Crop Tea spacing 1.5 m by 0.75 m Crop Beans

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MACRO NUTRIENTS

Plant nutrients occur in the soil in form of soluble substances. These substances are taken in by the plants in different quantities depending on their roles in the plant tissues. Essential Elements These are nutrients needed by plants for various uses. They are divided into two broad categories namely: Macronutrients Micronutrients. Macro-nutrients –  These are

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MICRO NUTRIENTS

Also referred to as trace or minor nutrients. They are required in small quantities/traces. They are essential for proper growth and development of plants. They include; Iron, Manganese, Copper Boron, Molybdenum ROLE OF MICRONUTRIENTS AND THEIR DEFICIENCY SYMPTOMS Copper Role in oxidation-reduction reactions. Respiration and utilization of iron Deficiency symptoms-yellowing of young leaves. Iron Synthesis

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PREPARATION OF PLANTING MATERIALS

After the planting materials are selected they are prepared in different ways before they are planted. Some of the methods used to prepare planting materials include the following: Breaking the seed dormancy. Some seeds undergo a dormancy period between maturity and the time they sprout. The dormancy period is the stage whereby a seed cannot

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LIVESTOCK PRODUCTION (NUTRITION)

Animals are fed for the purpose of production and body maintenance. The edible material given to animals is called food. It is digested, absorbed and utilized in the body. Nutrients are organic and inorganic substances contained in the food materials Components of Food material Water, protein, Carbohydrates, Fats and oils, Vitamins Mineral salts. Water Sources

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CLASSIFICATION OF ANIMAL FEEDS

This is based on nutrient composition: Feed additives. Roughages Are feeds of low available nutrients per unit weight and high fibre content Examples: Dry roughages, Succulent roughages, Residues from agricultural by products and conserved materials. Characteristics Low level of available nutrients. Have high level of calcium especially legumes. Good source of vitamin A. Have high

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