Neco Model Questions Vol1 2019 Agricultural Science Question 2

Practice essay / theory question 2 from the 2019 Neco Model Questions Vol1 Agricultural Science examination. This question covers Soil Science .

Neco Model Questions Vol1 2019 Agricultural Science Essay / Theory
Topic: Soil Science
Question 2 NECO_MODEL_QUESTIONS_VOL1 • 2019 • AGRICULTURAL_SCIENCE • essay

A soil scientist conducts a field experiment to determine the infiltration rate of a sandy loam using a double‑ring infiltrometer. The set‑up is shown in the illustration.

Question Parts

( a )
Explain why the double‑ring design reduces lateral water flow and therefore provides a more accurate measurement of vertical infiltration.
( b )
The inner ring has a diameter of 30 cm and the outer ring 60 cm. Water is added to the inner ring until the water level rises 5 cm above the soil surface. The time taken for the water level to fall from 5 cm to 3 cm is recorded as 12 minutes. Assuming steady infiltration, calculate the infiltration rate in mm hour⁻¹. Show your calculation.
( c )
If the measured infiltration rate must be corrected for a soil temperature of 25 °C using the temperature correction factor K = 1 + 0.02(T – 20), where T is temperature in °C, compute the corrected infiltration rate. Give the final value to one decimal place.

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About This Question

This is Neco Model Questions Vol1 2019 Agricultural Science Question 2. It is one of the essay questions from the 2019 Neco Model Questions Vol1 Agricultural Science examination.

The question covers Soil Science .

View More Neco Model Questions Vol1 2019 Agricultural Science Questions More Neco Model Questions Vol1 Practice Questions Back to Questions

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