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RRG611S - RANGELAND REGENERATION - 2ND OPP - JUNE 2025 |
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nAml BIA UnlVERSITY
OF SCIEnCEAnDTECHnOLOGY
FACULTYOF HEALTH,NATURAL RESOURCESAND APPLIEDSCIENCES
SCHOOLOF AGRICULTUREAND NATURAL RESOURCESSCIENCES
DEPARTMENT OF AGRICULTURALSCIENCESAND AGRIBUSINESS
QUALIFICATIONS: BACHELOROF SCIENCEIN AGRICULTURE
QUALIFICATIONS CODE: 07BAGA
LEVEL: 7
COURSECODE: RRG611S
DATE: JULY 2025
COURSENAME: RANGELAND REGENERATION
PAPER: THEORY
DURATION: 3 HOURS
MARKS: 100
EXAMINER:
MODERATOR:
SECONDOPPORTUNITY EXAMINATION QUESTION PAPER
DR. JEROME BOYS
PROF.HILMA RANTILLAAMWELE
INSTRUCTIONS
1. Answer all questions.
2. Please write neatly and legibly.
3. Do not use the left side margin of the exam paper. This must be allowed for the examiner.
4. No books, notes and other additional aids are allowed.
5. Mark all answers clearly with their respective question numbers.
PERMISSIBLEMATERIALS:
1. None-programmable calculator
I ATTACHMENTS
1. None
THIS QUESTION CONSISTSOF 3 PAGES
(Including This Front Page)
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QUESTION 1
Define the following with emphasis on rangeland science:
l. I. Sampling,
(2)
1.2. Problem plants,
(2)
1.3. Zero grazing,
(2)
1.4. Grazer Unit,
(2)
1.5. Browser Unit,
(2)
1.6. Rotational grazing,
(2)
1.7. Dominants, and
(2)
1.7. Benchmarks.
(I)
[15]
QUESTION2
2.1. Name the three (3) primary and three (3) secondary determinants of vegetation.
(6)
2.2. Name any four (4) factors that determine the choice of a rotational grazing system.
(4)
2.3. Name any five (5) rotational grazing systems
(5)
2.4. Name any five (5) disadvantages of continuous grazing systems
(5)
[20]
QUESTION 3
3.1. Discuss five (5) reasons why a farmer would want to burn a piece of rangeland on his/her
farm.
(10)
3.2. Discuss five (5) factors that will influence the effects ofa rangeland fire. (10)
[20]
QUESTION 4
4.1. Discuss how the following factors affect rangeland production.
• Climate,
(3)
Soils,
(3)
Physiographic factors, and
(3)
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• Grass and condition.
(3)
4.2. Explain how the effects of grazing can contribute to the retrogression of rangelands.
(3)
[15]
QUESTION 5
A farmer decided to determine grazing capacity in a single camp on his/her farm. The farmer
clipped 40, (0.5m x 0.5m) quadrates with a TOTAL yield of 8 kg of grass after it was dried in
an oven.
5.1. Calculate the grazing capacity from the dry matter yield for a year (365 days) in kg Animal
Biomass/ ha/ year, using a 50% utilization factor, and 3% daily forage consumption. Show
all your calculations.
(5)
5.2. The camp is 80-ha and the farmer is planning to stock the camp with 1500 ewes with an
average mass of 55kg. How many days can the farmer use this camp?
(6)
5.3. The farmer prefers the grazing capacity to be calculated in ha/SSU. Please do it for the
farmer?
(4)
[15]
QUESTION 6
You have done a woody survey in a 50m x 2.5m belt transect and recorded the following plants
with their plant heights:
25 x D. cinerea: 2.8m height/plant
17 x G. flava: 2.3m height/plant
13 x B. albitrunca: 4. 7m height/plant
6.1. What is the plant density (plants/ha) on a species basis?
(6)
6.2. What is the total plant density (plants/ha)?
(2)
6.3. What is the total plant de~sity (Tree Equivalents/ha)?
(5)
6.4. Why are there more Tree Equivalents (TE)/ha than plants/ha?
(2)
[15]
END OF QUESTION PAPER
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