Exam 2019, questions PDF

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UNIVERSITY OF THE FREE STATE BLOEMFONTEIN CAMPUS

SOIL 2624/SOIL 2664 DEPARTEMENT OF SOIL, CROP AND CLIMATE SCIENCES CONTACT NUMBER: 051 401 2212 EXAMINATION: Additional End-Of-Year 2019 PAPER 1 ASSESSOR: Mrs N. Mathinya MODERATOR: Prof L. D. van Rensburg TIME: 3 hours

MARKS: 100

Answer all the questions. QUESTION 1 1.1 Give the definition of sustainability and discuss the five pillars on which sustainable agriculture is built on. (5) 1.2 Explain the concept of inherent and dynamic soil properties within the framework of soil quality.

(5)

QUESTION 2 Discuss the influence of soil texture on soil processes.

(10)

QUESTION 3 Evaluate the factors that influence soil aggregation.

(10)

QUESTION 4 Soil compaction is a substantial problem in cultivated soils. Assess the statement and elaborate on preventative and curative measures that farmers can apply to manage compaction. (10) QUESTION 5 1

Discuss critically the principles on which the cultivation guidelines for the summer rainfall areas of South Africa are based upon.

(10)

QUESTION 6 List and describe the different types of rainwater harvesting techniques used in South Africa. (10) QUESTION 7 Evaluate the difficulties encountered with an accurate determination of soil water content.

(5)

QUESTION 8 Explain with practical examples how you would minimise the losses of the soil water balance equation under irrigation.

(5)

QUESTION 9 Discuss the three methods by which irrigations can be scheduled.

(10)

QUESTION 10 10.1 Summarise the main principles that determine the suitability of soils for irrigation. (10) 10.2 Write an overview on the reclamation of sodic soils under irrigation.

(10)

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