Exam 11: Soil: Foundation for Land Ecosystems

Severe wildfires followed by heavy rains have significantly eroded the soil of a formerly forested region.Which one of the following horizons is most likely intact with little disturbance?

-The strips of farmland in this region are used to

Most plant productivity in a forest is most directly related to the

Where there is rapid decomposition of plant matter,we expect to find soils that have

The main cause of desertification by the degradation of drylands is

A hydric soil is one that

Leaching of minerals from soils,especially calcium,magnesium and potassium can be increased when

Which one of the following soil horizons is least likely to be interacting directly with living organisms?

Which of the following represents the proper sequence of these types of erosion,resulting from rainfall?

Which one of the following soil orders is the most typical of drylands and deserts?

Which of the following might best help grasses in a lawn that have been growing in a soil that has a high percentage of clay?

Planting rows of trees or shrubs around the periphery of a plowed field are long established farming practices that

-The planting of strips of trees and shrubs along the edges of plowed fields is used to

The main lesson learned from the experiences of Gabino Lopez farming steep lands in Guatemala is that

A farm field that has used only inorganic fertilizer for the past 20 years is most likely to have

The Kesterson Effect can result from efforts to restore land that are affected by

Global satellite imagery of land on Earth over the past 20 years reveals

Passing along some old gardening advice,a neighbor says,"If you want a great garden,

NGOs such as COSECHA in Central America

The sustainability of agricultural practices