A soil has a bulk density of 1.7 g/cm3. One would expect plant growth to: Naim 16:56 Add Comment A soil has a bulk density of 1.7 g/cm3. One would expect plant growth to: Answer: be restricted
Organic soils often have a bulk density as low as g/cm3. Naim 16:56 Add Comment Organic soils often have a bulk density as low as _____ g/cm3. Answer: 0.2
A soil has bulk density of 1.9 g/cm3. One would expect plant growth to: Naim 16:56 Add Comment A soil has bulk density of 1.9 g/cm3. One would expect plant growth to: Answer: cease
A soil has a bulk density of 1.5 g/cm3. One would expect plant growth to: Naim 16:55 Add Comment A soil has a bulk density of 1.5 g/cm3. One would expect plant growth to: Answer: be normal
Root growth usually ceases when the bulk density of a soil gets above ________ g/cm3. Naim 16:55 Add Comment Root growth usually ceases when the bulk density of a soil gets above ________ g/cm3. Answer: 1.85
Root growth usually is normal as long as the bulk density of a soil remains below _______ g/cm3. Naim 16:55 Add Comment Root growth usually is normal as long as the bulk density of a soil remains below _______ g/cm3. Answer: 1.6
Within limits, as one fluffs up a soil it will hold more: Naim 16:55 Add Comment Within limits, as one fluffs up a soil it will hold more: Answer: available water
A soil has 35 percent pore space. One would expect plant growth to: Naim 16:54 Add Comment A soil has 35 percent pore space. One would expect plant growth to: Answer: be restricted
Within limits, as the micropore space in a soil increases total water holding capacity: Naim 16:54 Add Comment Within limits, as the micropore space in a soil increases total water holding capacity: Answer: increases
A soil has a bulk density of 1.3 g/cm3. One would expect plant growth to: Naim 16:54 Add Comment A soil has a bulk density of 1.3 g/cm3. One would expect plant growth to: Answer: be normal
Root growth is restricted when the when the percent pore space of a soil gets below _________. Naim 16:54 Add Comment Root growth is restricted when the when the percent pore space of a soil gets below _________. Answer: 40%
Root growth is restricted when the bulk density of a soil gets about ______ g/cm3. Naim 16:54 Add Comment Root growth is restricted when the bulk density of a soil gets about ______ g/cm3. Answer: 1.6
An acre furrow slice weighs about: Naim 16:53 Add Comment An acre furrow slice weighs about: Answer: 1,000 tons
An ideal soil would be expected to have a particle density of _________ g/cm3. Naim 16:53 Add Comment An ideal soil would be expected to have a particle density of _________ g/cm3. Answer: 2.65
A particle density of a soil is influenced by the: Naim 16:53 Add Comment A particle density of a soil is influenced by the: Answer: mineral and organic matter
Compacting a soil increases its: Naim 16:53 Add Comment Compacting a soil increases its: Answer: bulk density
Particle density is the _________ divided by the volume of the solids. Naim 16:53 Add Comment Particle density is the _________ divided by the volume of the solids. Answer: weight when the soil is oven dry
An acre furrow slice weighed 1,847,000 lbs. This value is: Naim 16:52 Add Comment An acre furrow slice weighed 1,847,000 lbs. This value is: Answer: lower than expected for an idealized soil
As the percent of iron oxides in a soil decreases the particle density _________. Naim 16:52 Add Comment As the percent of iron oxides in a soil decreases the particle density _________. Answer: increases
A soil lost 5 tons/acre from erosion. This is _________ % of the weight of an AFS. Naim 16:52 Add Comment A soil lost 5 tons/acre from erosion. This is _________ % of the weight of an AFS. Answer: 0.5
An acre furrow slice is a volume of soil one acre in area to an approximate depth of: Naim 16:52 Add Comment An acre furrow slice is a volume of soil one acre in area to an approximate depth of: Answer: about 6"
The bulk density of a soil is the oven dry weight of a soil divided by the: Naim 16:51 Add Comment The bulk density of a soil is the oven dry weight of a soil divided by the: Answer: volume of the soil solids plus the volume of the soil pores
As the percent organic matter in a soil increases the particle density __________. Naim 16:51 Add Comment As the percent organic matter in a soil increases the particle density __________. Answer: decreases
Two soils are identical except one has a bulk density of 83.7 lbs/ft3 and the other has a bulk density of 96.4 lbs/ ft3. Which has the most pore space? Naim 16:51 Add Comment Two soils are identical except one has a bulk density of 83.7 lbs/ft3 and the other has a bulk density of 96.4 lbs/ ft3. Which has the most pore space? Answer: The soil with 83.7 lbs/ft3
Plowing a soil _______ the particle density of the soil. Naim 16:51 Add Comment Plowing a soil _______ the particle density of the soil. Answer: does not change
Bulk density is the _______ divided by the total volume of the soil. Naim 16:50 Add Comment Bulk density is the _______ divided by the total volume of the soil. Answer: weight when the soil is oven dry
An idealized soil with 50% pore space would be expected to have a bulk density of _________ g/cm3. Naim 16:50 Add Comment An idealized soil with 50% pore space would be expected to have a bulk density of _________ g/cm3. Answer: 1.325
A soil with a particle density of 3.0 g/cm3 is likely to be rich in: Naim 16:50 Add Comment A soil with a particle density of 3.0 g/cm3 is likely to be rich in: Answer: iron
Compacting a soil decreases its: Naim 16:50 Add Comment Compacting a soil decreases its: Answer: percent pore space
Two soils are identical except one has a bulk density of 1.2 g/cm3 and the other has a bulk density of 1.4 g/cm3. Which has the most pore space? Naim 16:50 Add Comment Two soils are identical except one has a bulk density of 1.2 g/cm3 and the other has a bulk density of 1.4 g/cm3. Which has the most pore space? Answer: The soil with 1.2 g/cm3
A soil with particle density of 2.0 g/cm3 is likely to be rich in: Naim 16:49 Add Comment A soil with particle density of 2.0 g/cm3 is likely to be rich in: Answer: organic matter
The particle density of a soil is the oven dry weight of a soil divided by the: Naim 16:49 Add Comment The particle density of a soil is the oven dry weight of a soil divided by the: Answer: volume of the soil solids
The particle density of an average soil is __________ g/cm3. Naim 16:49 Add Comment The particle density of an average soil is __________ g/cm3. Answer: 2.65
A micropore: Naim 16:48 Add Comment A micropore: Answer: contains both available and unavailable water
When a soil is field moist, it contains: Naim 16:48 Add Comment When a soil is field moist, it contains: Answer: both available and unavailable water
At saturation ___________ are filled with water. Naim 16:48 Add Comment At saturation ___________ are filled with water. Answer: both macropores and micropores
Roots grow primarily in the: Naim 16:47 Add Comment Roots grow primarily in the: Answer: aeration pores
Most of the water in the soil is stored in the: Naim 16:47 Add Comment Most of the water in the soil is stored in the: Answer: capillary pores
At field dry _______ are filled with water. Naim 16:47 Add Comment At field dry _______ are filled with water. Answer: micropores
An idealized soil would be expected to contain about _________ solids. Naim 16:46 Add Comment An idealized soil would be expected to contain about _________ solids. Answer: 50%
At field moist _________ are filled with water. Naim 16:46 Add Comment At field moist _________ are filled with water. Answer: micropores
An idealized soil would be expected to have about _______ of its pore volume occupied by air. Naim 16:46 Add Comment An idealized soil would be expected to have about _______ of its pore volume occupied by air. Answer: 33%
An idealized soil would be expected to contain about _______ organic matter. Naim 16:45 Add Comment An idealized soil would be expected to contain about _______ organic matter. Answer: 5%
Most of the gases in the soil move in the: Naim 16:45 Add Comment Most of the gases in the soil move in the: Answer: macropores
At field dry, the soil contains: Naim 16:45 Add Comment At field dry, the soil contains: Answer: unavailable water
An idealized sold would be expected to contain about ________ unavailable water. Naim 16:44 Add Comment An idealized sold would be expected to contain about ________ unavailable water. Answer: 16 2/3%
An idealized soil would be expected to have about ________ of its pore volume occupied by unavailable water. Naim 16:44 Add Comment An idealized soil would be expected to have about ________ of its pore volume occupied by unavailable water. Answer: 33%
An idealized soil would be expected to contain about _________ available water. Naim 16:44 Add Comment An idealized soil would be expected to contain about _________ available water. Answer: 16 2/3%
Most of the water in the soil is stored in the: Naim 16:44 Add Comment Most of the water in the soil is stored in the: Answer: micropores
An idealized soil would be expected to contain about ________ mineral matter. Naim 16:43 Add Comment An idealized soil would be expected to contain about ________ mineral matter. Answer: 45%