SOIL 1113 EXAM 2 ABIT WITH COMPLETE SOLUTIONS 100%
VERIFIED!!!! ALREADY GRADED A+
What is soil pH? - (ANSWER)Soil pH is a measure of the H+ concentration in the soil, or the acidity or
alkalinity of a soil solution.
What useful information can we infer from knowing soil pH? - (ANSWER)pH determines what nutrients
are available to the roots, influences microbial activity and has a direct influence on the growth of crops.
Circumneutral pH - (ANSWER)near-neutral pH conditions. When pH of the soil solution is between 6.5 -
7.5
Acidic pH - (ANSWER)pH level less than seven
Basic pH - (ANSWER)pH level greater than seven
What variable is pH? - (ANSWER)Master
What does low pH mean? - (ANSWER)High hydrogen ion concentration
How to rehabilitate acid soils? - (ANSWER)Apply lime
How to lower soil pH? - (ANSWER)Use iron sulfide, organic matter, or ammonium-containing fertilizers.
How to choose a lime? - (ANSWER)Chemical composition, purity of lime, fineness.
What charge do soils normally have? - (ANSWER)Negative charge
How is soil able to store plant nutrients and treat chemical contaminants? - (ANSWER)Solid particles
almost always have charged surfaces that attract cations (positively-charged) and/or anions (negatively-
charged) from the soil solution. The charged surfaces are important in retaining soil nutrients and in
treating pollutants.
, SOIL 1113 EXAM 2 ABIT WITH COMPLETE SOLUTIONS 100%
VERIFIED!!!! ALREADY GRADED A+
What is the ion exchange process? - (ANSWER)The ions that are stored on the surface of soil particles
could be released back into the solution if there is another ion of similar charge from the soil solution
that can take its place.
Sand and Silt - (ANSWER)Coarse, not charged, low surface area, chemically unreactive
Clay and Humus - (ANSWER)Fine, charged, high surface area, highly chemical reactive
Global inventory of water resources - (ANSWER)Total water on Earth: 362 million, Saline groundwater:
.93%, Oceans: 96.5%, Groundwater: 30.1%, Glaciers and Ice caps: 68.6%, Lakes: 20.1%, Ice and Snow:
73.1%
What is the current state of our water resources? - (ANSWER)There are two sources of water for human
consumption: 1.) surface water bodies and 2.) groundwater
What are the various components of a watershed-scale water budget? - (ANSWER)Onsite wastewater
treatment system, irrigation, precipitation, infiltration, evapotranspiration, runoff
Watershed - (ANSWER)An area of land drained by a single system of streams and bounded by ridges that
separate it from adjacent watersheds.
How can the water budget be managed to increase the storage of water in the soil? - (ANSWER)Limit
evaporation and transpiration losses, prevent and limit runoff losses, prevent deep percolation losses,
efficiently apply irrigation and other inputs.
What determines the time, amount, and method of irrigation application? - (ANSWER)Time: Water
content of soil, Amount: the plants need for water, capacity of the soil to store water, depth of rooting
VERIFIED!!!! ALREADY GRADED A+
What is soil pH? - (ANSWER)Soil pH is a measure of the H+ concentration in the soil, or the acidity or
alkalinity of a soil solution.
What useful information can we infer from knowing soil pH? - (ANSWER)pH determines what nutrients
are available to the roots, influences microbial activity and has a direct influence on the growth of crops.
Circumneutral pH - (ANSWER)near-neutral pH conditions. When pH of the soil solution is between 6.5 -
7.5
Acidic pH - (ANSWER)pH level less than seven
Basic pH - (ANSWER)pH level greater than seven
What variable is pH? - (ANSWER)Master
What does low pH mean? - (ANSWER)High hydrogen ion concentration
How to rehabilitate acid soils? - (ANSWER)Apply lime
How to lower soil pH? - (ANSWER)Use iron sulfide, organic matter, or ammonium-containing fertilizers.
How to choose a lime? - (ANSWER)Chemical composition, purity of lime, fineness.
What charge do soils normally have? - (ANSWER)Negative charge
How is soil able to store plant nutrients and treat chemical contaminants? - (ANSWER)Solid particles
almost always have charged surfaces that attract cations (positively-charged) and/or anions (negatively-
charged) from the soil solution. The charged surfaces are important in retaining soil nutrients and in
treating pollutants.
, SOIL 1113 EXAM 2 ABIT WITH COMPLETE SOLUTIONS 100%
VERIFIED!!!! ALREADY GRADED A+
What is the ion exchange process? - (ANSWER)The ions that are stored on the surface of soil particles
could be released back into the solution if there is another ion of similar charge from the soil solution
that can take its place.
Sand and Silt - (ANSWER)Coarse, not charged, low surface area, chemically unreactive
Clay and Humus - (ANSWER)Fine, charged, high surface area, highly chemical reactive
Global inventory of water resources - (ANSWER)Total water on Earth: 362 million, Saline groundwater:
.93%, Oceans: 96.5%, Groundwater: 30.1%, Glaciers and Ice caps: 68.6%, Lakes: 20.1%, Ice and Snow:
73.1%
What is the current state of our water resources? - (ANSWER)There are two sources of water for human
consumption: 1.) surface water bodies and 2.) groundwater
What are the various components of a watershed-scale water budget? - (ANSWER)Onsite wastewater
treatment system, irrigation, precipitation, infiltration, evapotranspiration, runoff
Watershed - (ANSWER)An area of land drained by a single system of streams and bounded by ridges that
separate it from adjacent watersheds.
How can the water budget be managed to increase the storage of water in the soil? - (ANSWER)Limit
evaporation and transpiration losses, prevent and limit runoff losses, prevent deep percolation losses,
efficiently apply irrigation and other inputs.
What determines the time, amount, and method of irrigation application? - (ANSWER)Time: Water
content of soil, Amount: the plants need for water, capacity of the soil to store water, depth of rooting
