Neco 2019 Agricultural Science Question 2

Practice practical question 2 from the 2019 Neco Agricultural Science examination. This question covers Soil Science .

Neco 2019 Agricultural Science Practical
Topic: Soil Science
Question 2 NECO • 2019 • AGRICULTURAL_SCIENCE • practical

A soil core was taken from a field to determine bulk density and field capacity. The core has an internal diameter of 5.0 cm and a height of 10.0 cm. Measurements obtained: - Fresh weight of the core (soil + water) = 420 g - Oven‑dry weight of the soil after removing the core = 350 g - Weight of the core after saturation and drainage (soil + retained water) = 380 g Using the data above, answer the following questions.

Question Parts

( a )
Calculate the bulk density of the soil in g cm⁻³. Give your answer to two decimal places.
( b )
Determine the gravimetric water content at field capacity as a percentage.
( c )
Convert the gravimetric water content obtained in (b) to volumetric water content (%) using the bulk density calculated in (a).
( d )
Mention two practical sources of error that could affect the accuracy of the bulk density determination and briefly explain how they influence the result.

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About This Question

This is Neco 2019 Agricultural Science Question 2. It is one of the practical questions from the 2019 Neco Agricultural Science examination.

The question covers Soil Science .

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