Upgrade to remove ads
Enviro Objectives 6
Terms in this set (26)
Sand, Silt, and Clay. Components that make up the soil. Minerals, organic matter, water and air
Slightly soluble residue of undigested or partially decomposed organic matter in topsoil. This material helps retain water and water-soluble nutrients, which can be taken up by plant roots.
Undesirable in large amounts but is critical to a good soil composition because of its water-holding capacity and cation exchange capacity.
Helps increase permeability and lightness of the soil. It does not hold nutrients or water very well, but helps water move downward towards the water table
Has very high capillary action, pulling water upward from the water table to the plant roots.
The volume of water a free-draining soil can contain.
The passage of a liquid through the spaces of porous material such as soil.
The process in which various chemicals in upper layers of soil are dissolved and carried to lower layers and, in some cases, to groundwater.
an ion with net positive charge, having more protons than electrons
a light-coloured fine-grained accumulation of clay and silt particles that have been deposited by the wind
complex form of intercropping in which a large number of different plants maturing at different times are planted together
cutting down trees and other vegeta
tion in a patch of forest, leaving the cut vegetation on the ground to dry, and then burning it. The ashes that are left add nutrients to the nutrient-poor soils found in most tropical forest areas. Crops are planted between tree stumps. Plots must be abandoned after a few years (typically 2-5 years) because loss of soil fertility or invasion of vegetation from surrounding forest.
integrated pest management
combined use of biological, chemical, and cultivation methods in proper sequence and timing to keep the size of a pest population below the level that causes economically unacceptable loss of a crop or livestock animal.
law of unintended consequences
there is unpredictability in nature. when we intervene in nature, our actions always have consequences and we need to ask, "Now what will happen?". For example, in eastern Malaysia, the WOF used pesticides to kill off mosquitoes to stop malaria. This caused a chain of events that caused other insects to die, which then infected lizards, which infected cats, and the dead cats caused an outbreak of rats. The outbreak of rats made people susceptible to another type of infection. The decrease in insects such as wasps also meant that there was nothing to eat the caterpillars so the caterpillar population increased and started to eat the roofs of people's homes.
popular term for the introduction of scientifically bred or selected varieties of grain (rice, wheat, maize) that, with adequate inputs of fertilizer and water, can greatly increase crop yields.
Soil composition triangle
Part of performing a garden soil type test is to classify your garden soil as sandy, loamy, or clay. The triangle is a diagram that classifies soil components.
Soil erosion is a natural process. It becomes a problem when human activity causes it to occur much faster than under natural conditions.
Soil erosion is common in areas with steep slopes, where trees have been cut down, in droughts when crops and other vegetation grows poorly and in rural areas which are overpopulated. Soil erosion can be reduced by building terraces on hillsides, irrigation schemes to overcome droughts, planting more trees to bind the soil together and make wind breaks, and using fertilisers in overpopulated areas to make the soil more fertile.
is the degradation of land in any dryland. It is caused by a variety of factors, such as climate change and human activities. Desertification is a significant global ecological and environmental problem. As the desertification takes place, the landscape progresses through different stages and continuously transforms in appearance. The desertification generally creates increasingly larger empty spaces over a large strip of land.
The increase in concentration of salts in soil which are soluble lead to the process of salination. It depends on many factors. The poor drainage of soil leads to the accumulation of salts on the surface of soil. It may happen during the flood. The quality of irrigation water also plays a crucial role. In arid areas the ground water is saline. The irrigation water is rich in soluble salts. The salts can move from the lower to upper layers by the capillary action. It happens in the summer season.The increase usage of fertilizers may also add up to the salt content of soil. The salt is transported from one area to the other with the help of wind.
the agricultural practice of producing or growing a single crop or plant species over a wide area and for a large number of consecutive years. It is widely used in modern industrial agriculture and its implementation has allowed for large harvests from minimal labor. Monocultures can lead to the quicker spread of diseases, where a uniform crop is susceptible to a pathogen. 'Crop monoculture' is the practice of growing the same crop year after year
A vertical section of soil from the ground surface to the parent rock
The layer of loose leaves and organic debris at the surface of the soil.
Top layer of the soil horizon, topsoil, layer of dark decomposed organic material (AKA Humus).
consists of mineral layers which may contain concentrations of clay and minerals
This layer is little affected by the soil forming process, lack of pedological development.
not usually distinguished, contains unweathered rock.
THIS SET IS OFTEN IN FOLDERS WITH...
AP Enviro Objectives 1
AP Enviro Objectives 10
Enviro Objectives 12
Enviro Objectives 11
YOU MIGHT ALSO LIKE...
Ch. 9 AP Environmental Science (Soil and…
Ch. 9 AP Environmental Science (Soil and…
APES ch. 7 & 8
OTHER SETS BY THIS CREATOR
Port Fonda Summer Brunch Drinks
Port Fonda Summer Brunch Sides
Port Fonda Summer Brunch Standards
Port Fonda Summer Brunch Huevos