Soil Degredation and Pollution Flashcards
(40 cards)
What refers to the deterioration of soil quality? —-
Soil degradation
It occurs when soil loses value, whether in terms of minerals, organic matter, structure, texture, water retention, or volume, in the case of erosion. —-
Soil degradation
Healthy soil is about 25% ? and 25% ? —-
air ; water
The rest of the healthy soil is made up of minerals and organic matter. And is a home to a complex “soil food web” of 7 biotic factors. What are they? —-
microscopic fungi, algae, bacteria, and protozoa, as well as insects, earthworms, and small animals
In soil structure, what are the six soil horizons? —-
(OAEBCR) Organic layer, topsoil, eluviation layer, subsoil, parent rock, bedrock
In soil structure, what is the ideal range for lawn maintenance of acidity and alkalinity in soils? —-
between 5.5 to 7.0
In the causes, which depletes certain nutrients from the field? —-
monocropping under poor farming strategies
In the causes, which negatively affects the earth’s structure and nutrient availability? —-
inefficient irrigation under poor farming strategies
In the causes, over reliance on chemical fertilizers and pesticides leads to? —
degraded soil health under poor farming strategies
In the causes, practices like deep plowing and heavy tillage weaken soil aggregates and disrupt the structure of the ground. —-
aggressive cultivation
In the causes of soil degradation, [two words] can affect soil health and beneficial organisms through nutrient imbalances, environmental pollution, and acidifying the land. —-
misusing fertilizers
[blank] causes soil degradation by depleting vegetation cover and increasing ground compaction. —-
overgrazing
In the causes of soil degradation, clearing forests for agriculture, logging, or urban expansion destroys the protective vegetative cover of the land. —-
deforestation
What can be lost due to water erosion? —-
topsoil, organic matter, and nutrients
In the causes, [blank] occurs as a result of overwatering and poor drainage. —-
erosion
In the causes, fine particles are blown away by [two words] when drought-stricken fields are left. —-
wind erosion
In the causes, [two words] involves land conversion, ground sealing, and infrastructure construction, all of which lead to the loss of fertile soil and land degradation. —-
urban expansion
In the causes, [four words] can introduce toxic pollutants and heavy metals into the land, making it unfit for agricultural or ecological purposes. —-
industrial and mining activities
In the causes, [two words] is a threat to human health and the environment, caused by the discharge of toxic pollutants and chemicals through industrial spills, incorrect waste disposal, or agricultural runoff. —-
soil contamination
Enumerate the nine causes of soil degradation. [clue: Pfp,Ac,Mf,ODE,Ue,I&ma,Sc] —-
poor farming practices, Aggressive cultivation, Misusing fertilizers, Overgrazing, Deforestation, Erosion, Urban expansion, Industrial and mining activities, Soil contamination
Enumerate the five environmental impacts of soil degradation. [clue: LoB,Se,DF,Cc] —-
Loss of biodiversity, species extinction, desertification, flooding, climate change
In the environmental impact, what describes as the soil loses its nutrients or becomes polluted, it’s not able to support healthy trees and plants. This devastates the entire ecosystem, and all kinds of life, from soil microbes to birds and animals, no longer have food or a safe place to live? —-
Loss of biodiversity
In the environmental impact, what is a combination of a loss of habitat and disappearing food sources can threaten the very existence of many species? —-
species extinction
In the environmental impact, when the soil is so severely degraded that it can no longer support life, it essentially becomes an arid desert. —-
desertification