Which of the following soil properties is not influenced by microorganism activity?a.soil acidityb.amount of organic matterc. nutrient levelsd.none of the above
Which of the following is an effect of organic matter on soil?a.improved soil structureb.decreased water retentionc.increased nutrient lossd.all of the above
Which of the following is not a way that humus affects the properties of soil?a.Humus expands with increased moisture levels.b.Humus increases the movement of water and air in soil.c.Humus decreases the porosity of soil.d.Humus acts as the basis for soil life.
Decomposition of plant and animal matter present in soil is largely due to soil microorganisms.
How do minerals affect soil productivity?a.Minerals increase soil productivity by increasing the rate of water absorption.b.Minerals in the soil can eventually be used for plant growth and production.c.Minerals in the soil decrease the rate of plant growth and therefore productivity of the soil.d.Minerals have no measurable effect on soil productivity.
How does soil structure affect the characteristics of soil?a.It determines the acidity of soil.b.It determines the available nutrients of soil.c.It determines the pore space within soil horizons.d.It determines the amount of minerals present in soil.
Soil color is classified by _______.a.using a microscopeb.taking core samplesc.determining the proportion of mineralsd.using a color reference chart
Humus creates good soil tilth, which is an indirect benefit of microorganism action.
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