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
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.
Microorganisms play an important role in creating nutrient-rich soil.
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
Soil reaction is _______.a.the measure of the acidity or alkalinity of soilb.the highest amount of cations soil can absorbc.determined by the types of minerals in the soild.the layering of soil into horizons
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.
Which of the following properties of soil is most dependent on soil moisture?a.horizonationb.consistencyc.cation-exchange capacityd.soil reaction
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.
Microorganisms can improve soil health, but do not play a crucial role in it.
Healthy soil depends on _______.a.the size of rock particlesb.oxygen contentc.moisture contentd.all of the above
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