The most suitable soil for crops cultivation in Nigeria is

Assessment: JAMB UTME - Biology - 2025 Subject: Biology

Question 1 Report

The most suitable soil for crops cultivation in Nigeria is

Answer Details

Loamy soil is the most suitable soil for crop cultivation in Nigeria and in agriculture generally. Loam is a mixture of sand, silt, and clay in roughly balanced proportions, which gives it a combination of properties ideal for plant growth:

  • Good water retention and drainage: It holds enough moisture for roots to absorb but drains excess water, preventing waterlogging.
  • Good aeration: The presence of sand particles creates air spaces, allowing root respiration and the activity of beneficial soil organisms.
  • High nutrient content: The clay and silt fractions hold mineral ions through cation exchange, while organic matter (humus) further enriches the soil.
  • Easy to work: Loam is neither too heavy nor too light, making it easy to plough and cultivate.

Laterite soil is highly weathered and leached, with poor fertility and a hard, iron-rich crust that limits root penetration. Sandy soil drains too quickly and has very low nutrient-holding capacity. Clayey soil holds too much water, has poor drainage and aeration, and becomes very hard when dry, making it difficult for roots to penetrate.

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