JAMB - Biology (2006 - No. 28)
The soil type that contain nutrients which are not readily available for plants is
alluvial
clayey
sandy
loamy
Explicació
Clayey soil contains nutrients, but they are not readily available for plants because Clay particles have a high cation exchange capacity, which means they hold onto nutrients tightly, making them less available to plants. Also,clayey soils tend to have poor drainage and aeration, which can limit root growth and nutrient uptake.
In contrast:
- Alluvial soils (A) are typically fertile and have readily available nutrients. Also, it is not a type of soil
- Sandy soils (C) have poor nutrient retention, but nutrients are readily available.
- Loamy soils (D) have a balanced mix of clay, silt, and sand, making nutrients readily available to plants.
Therefore, the correct answer is option B - Clayey soil