2016 WAEC Agricultural Science Practical The diagram above illustrates an experimental setup to determine a soil property. Study them carefully...

The diagram above illustrates an experimental setup to determine a soil property.

Study them carefully and answer the question that follows;

(a) Suggest a suitable title for the experiment. [1 mark]

(b) Outline the procedure for carrying out the experiment.[ 7 marks]

(d) State two precautions to be taken when carrying out the experiment.[ 2 marks )

(e)(i) Which of the soil samples is prone to waterlogging?
(ii) Give one reason four your answer in (e)(i)

(a) Title of the experiment;

(b) Procedure for carrying out the experiment

Obtain samples of sandy, clayey and loamy so-Dry them under the sun.
Grind loamy and clayey soils
Plug the necks of three funnels with cotton wool
Put equal volumes of sandy, clayey and loamy soils separately into three funnels plugged with cotton wool.
Tap the funnels carefully on the bench until all air spaces are filled with soil
Stand each funnel in the open end of a measuring cylinder.
Pour 50cm of water into the funnel containing each soil sample.
Allow the setup to settle for at least 1 hour.
Measure the amount of water that dripped through each soil sample.
By subtracting the amount of water that dripped through each soil sample, obtain the amount of water retained in each soil sample.

(d) Precautions to be taken when carrying out the experiment

Soil samples should be dried under the sun
Loam and clay should be ground before use
The funnels should be properly plugged with tton wool to prevent soil samples from dripping into the measuring cylinders,
The funnels should be properly tapped to close ces that could distort the experiment.
Cylinders should be placed on flat and level surface.
Water should be poured into the cylinder at the all same time.

(e)(i) Soil sample in set up ll (clay) is prone to waterlogging; Soil sample in set up llI (clay) is prone to waterlogging

(ii) Reason;