Agricultural studio

In agriculture, everything starts with a seed.
If the seed is good and sown properly, half of the crop success is already achieved. So that seed and sowing methods are an important concept in agronomy. Many crop failures happen not because of fertilizers or irrigation, but due to poor seed quality or wrong sowing method.

In this blog, we will clearly understand:

• What is a seed?
• What is seed material?
• Important factors needed for seed germination.
• Methods of sowing.

This explanation is written specially for BSc Agriculture students and competitive exams like ICAR, CUET, State PSC, etc.

This topic is part of our Agronomy Notes series for agriculture students.

What is a Seed?

A seed is any plant part used for propagation or multiplication of plants.

Most students think only fertilized ovule is seed, but that is not fully correct.

Plant materials that act as seed: Leaf, Stem, Root, Fertilized ovule (true seed)

👉 Example: Potato farmers use tubers
, Sugarcane farmers use stem cuttings (setts), Onion farmers use bulbs

So, seed does not always mean grain.

Seed Material

Seed material is classified based on how the plant reproduces.

There are two main types:

1. Seed Material from Sexual Reproduction

In sexual reproduction, a fertilized ovule develops into a seed.

Example: Wheat, Rice, Maize, Mustard

Important terms to remember:

• Seed: Fertilized ovule used for raising crops or multiplication.
• Grain: Fertilized ovule used for food or feed purpose.

2. Seed Material from Asexual Reproduction

Here, new plants are produced without fertilization.
This method is very common in horticultural and plantation crops in India.

A. Natural Methods of Asexual Reproduction

These occur naturally without human help.

B. Artificial Methods of Asexual Reproduction

These are done with human intervention.

📌 Tissue culture banana is widely used in India for uniform plants and higher yield.

Essential Factors for Seed Germination

Seed germination does not happen automatically just by putting seed into the soil. For successful germination, some basic conditions must be available. If even one factor is missing, the seed may fail to germinate or produce weak seedlings.

A seed will germinate only when these conditions are fulfilled:

1. Capacity of the Seed to Germinate

First of all, the seed itself must be alive and healthy.
Only viable seeds can germinate. Old, damaged, or diseased seeds usually fail to sprout.

2. Moisture

Water is essential for germination.
Moisture helps the seed absorb water, which activates enzymes and starts growth of the embryo.
✓Too little water → seed remains dormant
✓Too much water → seed may rot due to lack of oxygen
👉 This is why proper irrigation after sowing is important.

3. Temperature

Every crop requires a suitable temperature range for germination.
Very low or very high temperature can delay or stop germination.

👉 Examples:
✓ Wheat germinates well in cool conditions.
✓ Rice requires comparatively warm temperature.
This is the reason crops are sown in specific seasons.

4. Oxygen Supply

Seeds need oxygen for respiration during germination. If soil becomes waterlogged or compacted, oxygen supply reduces and germination suffers.
👉 Well-aerated soil always supports better seed germination.

Method of Sowing

Sowing means placing seed or plant material into the soil.

There are two basic terms you must clearly understand.

• Seed Sowing: Placing seed into the soil for germination
• Planting: Placing plant propagules into the soil

Plant propagules include Seedlings, Roots, Tubers, Leaves, Cuttings.

👉 Example:
Wheat → Seed sowing
Sugarcane → Planting

Different Methods of Sowing

Sowing method means how seeds are placed in the soil. Choosing the correct sowing method helps in proper spacing, uniform germination, and good crop stand.

Different sowing methods used in Indian agriculture are explained below:

1. Broadcasting

Broadcasting is the oldest and simplest method of sowing.

• Seeds are scattered on the soil surface.
• Done manually or with mechanical spreaders.

👉 Commonly used for: Wheat, Rice (direct seeding), Fodder crops

Although this method is easy, seed distribution is often uneven.

2. Dibbling

In dibbling, seeds are placed in small holes or pits at fixed depth and spacing.

• Ensures equal distance between plants
• Done using dibbler, planter, or by hand

👉 Common crops: Maize, Cotton, Pigeon pea

This method is suitable for crops with bold seeds.

3. Drilling

In drilling, seeds are dropped continuously in furrows and then covered with soil.

• Maintains proper depth and spacing
• Can be done manually or with seed drill

👉 Common crops: Wheat, Barley, Mustard

This method gives uniform germination and better plant population.

4. Sowing Behind Country Plough

This is a traditional sowing method used mainly in rural areas.

• Seeds are dropped behind the plough by a person.
• Simple and low-cost method.

Types:
1. Kera method
2. Pora method

👉 Mostly used in rainfed farming systems.

5. Planting

Planting refers to placing plant parts or propagules firmly into the soil for growth.

👉 Examples:
Sugarcane setts
Potato tubers
Banana suckers

This method ensures strong establishment of crops.

6. Transplanting

Transplanting is the method of shifting seedlings from nursery to the main field.

• Seedlings are first raised in nursery
• Later planted in prepared field

👉 Common crops: Rice, Vegetables, Tobacco

This method helps in better field management and healthy crop growth.

Important Questions ❓