TMA2/BIO408

TMA Quiz Questions TMA: TMA2/BIO408 Matric Number:  SCORE =9.00 BIO408 - Soil Ecology Dr. Olaniyi Omolara (oolaniyi@noun.edu.ng ) 1 Which of the following is not a sub-order of soils formed under wet conditions? Aquerts Aquelts Aquents Aquepts 2 Soils in the udolls sub-order are ____ moist mollisols moist alfisols moist entisols moist ultisols 3 Which of the following best describes the term weathering? The physical degradation of rocks The chemical breakdown of rock pieces The physical and chemical breakdown of soil particles The determination of soil chemical components 4 What are primary minerals? Primary minerals are minerals that have not been altered chemically Primary minerals are minerals that have been altered physically and chemically Primary minerals are minerals that have not been altered physically Primary minerals are minerals directly from the parent rock material 5 Limestone may metamorphose to marble and shale to slate. What can Dolomite metamorphose to? Marble Quartzite Schist Gneiss 6 Which of the following factors does not determine the chemical component of soils? Water run-off Parent materials Origin of soil minerals Mechanisms of weathering 7 Which is the correct sequence the phases in soil analysis? Routine soil analysis - sampling of soil - chemical analysis of soil Sampling of soil - Chemical analysis of soil - Interpretation of soil analysis result Soil analysis result sampling - Chemical soil analysis - Soil sampling Soil sampling - soil analysis - Soil Chemical analysis 8 How many categories of soil classification are identified in soil taxonomy? 4 6 8 10 9 When is the time in which soil sampling was done important? If soil quality is to be tested If soil depth is to be assessed for forest plants/trees If planting is to be determined If year to year comparisons are to be made 10 Soil test of an area was made with soil samples collected at the same time of the year for three consecutive years. What is is this test likely directed at? To be able to determine nutrient level over time Determining changes in soil quality over the specified period of time To determined the extent of physical weathering over time To assess biota quality over time 11 Which of the following is not correct about soil analysis result? Soil test values indicate the nutrient-suppling power of the soil. Soil test values do not indicate the actual amount of nutrient that will be supplied to the plant. Soil test values indicate the amount of nutrients taken up by the plant. Soil test values are more indicative than quantative. 12 Which of the following is critical for the sustainability of most ecosystems? Fertilizer use efficiency Continuous availability of plant nutrients Parent soil material Soil weathering and biota diversity 13 Why must you sample plants from the best and worst areas in a field when sampling plant tissues for chemical constituents? The concentration of one nutrient may be affected by that of another Uncertainties and complexities in interpreting tissue concentration data Interpretation of tissue concentration data may be complex and shrouded in uncertainties because the concentration of one nutrient may affect another nutrient. Plant tissue analysis for chemical constituents is an established procedure, which should be done. 14 Plant stalk nitrate value revealed that there was excessive level of nitrogen in the soil. Which of the following is not a likely advise you would give to avoid nitrogen leaching in future years? Do not plant a leguminous crop that would fix nitrogen in the soil. Rotate plants on the field and alternate plants that extract higher nitrate levels from the soil with those with lower demand Discourage denitrification. You should planta a crop that required high levels of nitrate. 15 Which of the following is not a benefit of soil organic matter? Soil organic matter makes plants to be prone to drought. Soil organic matter increases water infiltration and water-holding capacity of the soil. Soil organic matter increases the total soil volume and pore size. Soil organic matter helps stabilize soil structure. 16 What factor largely determines the chemical components of the soil? Erosion Weathering Soil horizon topography 17 Rocks are commonly classified as ___ minerals, muscovite and feldspars limestone, rockstone and metamorphic igneous, sedimentary and metamorphic igneous, blackstone and dolomite 18 Soil series are ___ subdivisions of the family subdivisions of the great groups subdivisions of the order subdivisions of the suborders 19 How are soil families delineated? Soil families are classified based on their restricted drainage level. Soil families are delineated based on intensity of earthworm activities Soils families are delineated in line with their similarities in physical and chemical properties that affect growth of plant roots at a specified depth. Soils families are delineated in line with their similarities in mechanical and electrical properties that sustain growth of plant roots at a specified depth. 20 How would you define biogeochemical weathering? Biogeochemical weathering is a process whereby physical weathering occur through abrasion erosion Biogeochemical weathering is a process whereby chemical weathering occur being enhanced by the presence of water. Biogeochemical weathering is a process whereby physical, chemical and glacial weathering occur together in unexpected locations. Biogeochemical weathering is a process whereby both physical and chemical weathering occur together and the chemical reactions are enhanced by the presence of water.