Waec Model Questions Vol1 2021 Agricultural Science Question 2

Practice practical question 2 from the 2021 Waec Model Questions Vol1 Agricultural Science examination. This question covers Soil Moisture, Water Holding Capacity, Irrigation Management .

Waec Model Questions Vol1 2021 Agricultural Science Practical
Topics: Soil Moisture Water Holding Capacity Irrigation Management
Question 2 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • AGRICULTURAL_SCIENCE • practical

A soil moisture experiment was conducted on a loamy field. The following gravimetric water contents were measured using the pressure plate apparatus: - At a matric potential of –10 kPa (field capacity): 30 % (w/w) - At a matric potential of –1500 kPa (wilting point): 12 % (w/w) The bulk density of the soil is 1.4 g cm⁻³. The field area is 1 ha and the effective rooting depth for the crop is 30 cm. Answer the questions below.

Question Parts

( a )
State the definitions of field capacity and wilting point in terms of soil water status.
( b )
Convert the gravimetric water contents at field capacity and wilting point to volumetric water contents (θ_v). Use the bulk density given and assume the density of water is 1 g cm⁻³.
( c )
Determine the available water capacity (AWC) of the soil profile in decimal form and as a percentage.

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About This Question

This is Waec Model Questions Vol1 2021 Agricultural Science Question 2. It is one of the practical questions from the 2021 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Soil Moisture, Water Holding Capacity, Irrigation Management .

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