National Open University Of Nigeria
Plot 91, Cadastral Zone, NnamdiAzikiwe Expressway, Jabi – Abuja
Faculty of Science
JANUARY/ FEBRUARY 2018 EXAMINATION
COURSE CODE: BIO 408 (2 CREDIT UNITS) TIME ALLOWED: 2 HOURS
COURSE TITLE: SOIL ECOLOGY
INSTRUCTION: QUESTION ONE IS COMPULSORY AND ANY OTHER THREE QUESTIONS.
1a What is Bio-Integration? (6 marks)
1b Outline and explain the factors determining soil formation (15 marks)
1c Outline the four soil formation processes (4 marks)
2a List any three primary pools or reservoirs of nutrients in a soil (3 marks)
2b What is a soil moisture regime? (3marks)
2c Outline and define the five main classes of soil based on soil moisture regime
(9 marks)
3a Enumerate the six basic types of reactions governing Chemical weathering
(6 marks)
3b List and explain any three major causes of physical weathering (9 marks)
4a What is Biogeochemical Weathering (3marks)
4b Briefly, describe the four principal shapes of soil (12 marks)
5a Identify and describe any four factors affecting the growth of soil organisms(12 marks)
5b Outline any three merits of Soil Organisms (3 marks)
You can get the exam summary answers for this course from 08039407882
Check anoda sample below
