Soil Science NCV Level 3 — Document

February 2018 — NCV Level 3 — Soil Science

NCV Level 3 2018 NCV Agriculture

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🎯 150 marks ⏱️ 3h 📄 13 pages 📝 95 items found 📚 3 topics

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Questions — A Preview of What to Expect in the Document

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Q1— Section header —

1.1Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (1.1.1

1.1.1\in the ANSWER BOOK.

1.1.1Most plants grow best at a pH between .. 5, 5 and 7

1.1.2Which element react with phosphorus at pH above 7 5 and ties it up

1.1Which element reacts with phosphorus at a pH below 5 making it an insoluble compound

1.1The solution used to cause hydrogen ions to leave the particle surface and enter the soil solution

1.1The method of growing crops that involves no disturbance to soil where seeds have been planted into slits in the soil and the

1.1A 50 kg bag of LAN with 10% active ingredients costs R30 00. How much is nitrogen only

1.1The two main forces that hold water in the soil

1.1A substance that changes colour over a range of pH values

1.1A large corkscrew tool commonly used to bore into the ground to tak soil samples

1.110 fertiliser traight

1.1.1given soil Structure Till ability

1.1.1Which ONE of the following is NOT a condition that affects limiting factors?

1.1.1NE of the following materials CANNOT be used to make compost

1.1.1The most water efficient irrigation system

1.1.1Plant nitrogen gas and nitrite

1.2Choose a term (s\ from COLUMN B that matches a description in COLUMN A. Write only the letter (A J\ next to the question number (1.2.1

1.2.5\in the ANSWER BOOK. COLUMN A COLUMN B

1.2.5Moving stock from one grazing area to another Non indigenous plants that encroach natural vegetation and reduce the area available for grazing

1.3Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only true or false

1.3.5\ the ANSWER BOOK

1.3.1The downward movement of water by gravity is called capillarity

1.3.2Soil water move sideways or towards the root zone by percolation

1.3.3Evaporati on is the loss of water through the surface of the leaf

1.3.4Gullies or dongas are large and more permanent features

1.3.5

1.4Give ONE term for each of the following descriptions. Write only the term next to the question number (1.4.1

1.4.10\the ANSWER BOOK.

1.4.1quipment that accurately calculate soil moisture content and can be used to monitor wetting and drying phases

1.4.2oil transported and deposited away from its origin

1.4.3icrobial conversion of ammonium compounds to nitrates and nitrites

1.4.4ormation of a thin compacted layer on the surface of bare soil under the impact of falling drops

1.4.5lants that inhibit or slow the growth of other nearby plants by releasing natural toxins or allelochemicals

1.4.6rocess where carbon dioxide is released to react with water to form carbonic acid with the release of hydrogen ion

1.4.7eaction of water with alcium, agnesium and odium to form hydroxyl ions (OH

1.4.8ong narrow line of crop or residue designed to best achieve drying and curing

1.4.9arge, open area for grazing livestock

1.4.10

1.5Complete the following sentences by filling in the missing word or words Write only the word or words next to the question number (1.5.1

1.5.10\in the ANSWER BOOK.

1.5.3In poorly drained soils, the large

1.5.4Ploughing where a narrow cut is made in the soil for planting seeds

1.5.5perennial cash crop

1.5.6The pH scale indicates how acidic or alkaline a solution is by giving (1011003\ NC2720 (E\

1.5.7the wet and dry soil moisture limits of the field capacity and wilting point

1.5.8substance

1.5.9how fertiliser is spread evenly over the whole area to be fertilised

1.5.1050

Q2— Section header —

2.1

2.2

2.3The table below shows the components of a modified Hoagland nutrient solution commonly used in hydroponic systems. Complete the table by indicating the nutrients supplied by each of the component of solution.

2.4Mr Nesane needs to know how many kilograms (kg\ of each nutrient there are in a bag to meet the recommendations f the laboratory. The recommendations for a

2.4.1Calculate the percentage of nitrogen and phosphorus in the fertiliser (4\

2.4.2How much fertiliser does he need to buy to supply the required amount of phosphorus (4\

2.4.3How much itrogen will the fertiliser in QUESTION

2.4.2supply (2\

2.4.4How much more nitro gen would the farmer still need after purchasing the fertili er in QUESTION

2.4.2to meet the itrogen (N\equirement (2\ [25]25

Q3— Section header —

3.1Study the table below which shows the nutrient content of animal manure (kg of nutrients\te that ALL the animals were given food of high quality. ANIMALS

3.1.1Give TWO types of animal manure that have the highest nitrogen content (2\

3.1.2Briefly discuss why sheep manure has highe nitrogen content than poultry manure (4\

3.1.3Good manure management increases economic returns. Explain briefly what a good storage facility should look like (4\

3.1.4Indicate the impact of farm manure on soil microorganisms (2\ (1011003\ 10

3.2Read the following scenario and answer the questions Mr Gert Viljoen is a crop farmer who farm ed on land that

3.2.1Nam FOUR cations found in high concentration n acid soil. (4\

3.2.2Which cation will mostly affect plant r oots at a pH below 4, (2\

3.2.3What signs show that the roots were affected by the cation

Q3— Section header —

3.2.425

Q4— Section header —

4.1Study the graph below and a nswer the questions.

4.1.1Define the term infiltration rate (2\

4.1.2Name THREE factors that influence the infiltration rate in the soil (3\

4.1.3According to the graph sandy soil has high er infiltration rate than clay soil and it took more hours for the

4.1.4List FIVE factors that can be used to increase the infiltration rate (5\

4.2

4.3Ind icate any FOUR reasons why over irrigation would reduce plant growth, development and production (4\

4.4Calculate the total available moisture (TAM\for a maize crop with a rooting depth of 500 mm. he soil has an available moisture capacity (AMC\of 90 mm/m. Show ALL the steps of the

Q5— Section header —

5.1There are various conservation practices that can be used on rangeland to prevent soil erosion. Restriction on animal numbers (carrying capacity\is one of the conservation practices. The picture below represents this practice.

5.1.1Which paddock (camp\epresents the right number of livestock (1\

5.1.2Give a reason for the

Q5— Section header —

5.1.3After observing the two pictures, how would wrong farming practice affect livestock? (2\

5.1.4

5.2

5.3Describe each of the following types of erosion and explain how they occur

5.3.1Splash erosion

5.3.2Rill erosion

5.3.3

5.4riefly explain how erosion affects soil fertility (2\ [25] TOTAL SECTION B:25

Topics Identified

Business EnvironmentsBusiness FunctionsLeadership

Mark Allocation

Total150 marks

Sections50 + 25 + 25 + 25 + 25 = 150 marks

Paper information

TitleDocument

SubjectSoil Science

LevelNCV Level 3

Document typeQuestion paper

Year2018

MonthFebruary

Pages13

Downloads6

Examination context

Decade2010s

Years ago8y

SeasonSummer (SH)

Start dayThursday

Exam periodFebruary 2018

Days since exam3,174

About Soil Science examination preparation

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How to use this resource for revision

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For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

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working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

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