What are the main nutrients that fertile soil should be rich in?

True or False: Soil fertility cannot be enhanced by adding fertilizers.

False. Soil fertility can be enhanced by adding fertilizers.

Riddle: I am formed from rocks and decomposed materials, and I help plants grow. What am I?

Multiple Choice: Which of the following is NOT a feature of fertile soil? A) Sufficient moisture B) High depth C) Lack of organic matter D) Rich in nutrients

C) Lack of organic matter

What are the primary characteristics of residual soil types mentioned in the classification of soil?

Residual soil types have unique features.

• Black Soil retains moisture well.

• Red Soil is rich in iron.

• Desert Soil is sandy, low nutrients.

Fill in the blank: Alluvial soil is created by the deposition of sediments carried by ___ from their upper to lower courses.

Rivers

Riddle: I am found in river basins and deltas, formed by flowing water, and I am known for my fertility. What am I?

Alluvial Soil

Describe the differences between the upper plains and lower valleys regarding alluvial soil texture.

Upper plains have coarse alluvial soil.

• Upper plains feature larger particles.

• Lower valleys have finer soil texture.

• Sediments vary due to river deposits.

Fill in the blank: Desert soil is typically ___ and lacks organic matter, making it suitable for drought-resistant crops.

Sandy

Short Answer: What is the significance of the iron content in Red Soil?

The iron content gives Red Soil its characteristic reddish color and influences its suitability for certain crops like millets and pulses.

What is the primary factor that gives red soil its distinct color?

The red color of the soil comes from the high presence of iron oxide.

Red soil is primarily formed from ___ rocks of the Peninsular Plateau.

Ancient crystalline and metamorphic rocks.

What is one characteristic of the texture of red soil?

Red soil tends to be sandy to loamy in texture.

Multiple Choice: Which of the following is NOT a characteristic of red soil? A) High iron content B) Low water retention C) High fertility D) Formed from weathered rocks

C) High fertility. Red soil is generally less fertile than other soil types.