Soil Science
GCE Agricultural Science

a) Define the term 'soil texture' and explain how it differs from 'soil structure'. (4 marks) b) List FOUR soil separates recognized in soil science and state the size range of any TWO of them. (4 mar…

a) Explain the term 'soil pH' and state its significance in crop production. (4 marks) b) i) Name TWO crops that grow best in acidic soils and TWO crops that grow best in alkaline soils. (4 marks) …

The process by which clay and humus particles attract and hold nutrient cations in the soil is known as

Which of the following is the CORRECT sequence of soil formation factors proposed by Jenny (1941)?

A soil sample weighing 150 g when wet has a dry weight of 120 g. What is the percentage moisture content of the soil on a dry weight basis?

Which horizon in a typical soil profile is characterised by the accumulation of materials leached from the overlying layers?

Which of the following soil properties determines the ability of soil to transmit water through its pores?

The addition of lime to an acidic soil primarily serves to

Which of the following best describes the term 'soil catena'?

Which of the following soil organisms is MOST responsible for the decomposition of organic matter and the release of plant nutrients in the soil?

A soil has a bulk density of 1.5 g/cm³ and a particle density of 2.65 g/cm³. What is the percentage total porosity of the soil?

A farmer collected a soil sample and found it contained 40% sand, 35% silt, and 25% clay. Using the soil textural triangle, this soil would be classified as