1. the dominant cause for increased temperatures in raised planter beds is: a. r
ID: 289679 • Letter: 1
Question
1. the dominant cause for increased temperatures in raised planter beds is:
a. raising the soil places it closer to the sun.
b. raised beds naturally absorb heat faster
c. the drainage of water by raising the soil reduces water's thermal buffering
d. increase microbial activity generates kinetic heat.
2. basic soil characteristics such as fertility and water holding capacity can be estimated by conducting.
a. a percolation test b. a compaction test
c. a texture analysis d. a field evaluation
3. which of the following devices is best used for measuring water percolation and infiltration rates?
a. time domain reflectometer (TDR) b. gravimetric water analysis
c. double-ringed infiltrometer d. volumetric water analysis
4. which of the following procedures is used to divide soil's separates into various size groups?
a. the feel method or ribbon test b. a particle-size distribution analysis
c. a mechanical analysis d. standard proctor test
e. both b and c
Explanation / Answer
1. The dominant cause for increased temperatures in raised planter beds is the drainage of water by raising the soil reduces water's thermal buffering. The technique uses furrow irrigation and these furrows act as excellent drainage channels during heavy rains.
2. Basic soil characteristics such as fertility and water holding capacity can be estimated by conducting a percolation test. A percolation test helps us to calculate the soil percolation rate which further provides an idea about the water absorbing capacity of a soil.
3. c) Double ringed infiltrometer. A double ringed infiltrometer consists of an inner ring and an outer ring and is used to measure the water percolation and infiltration rates depending upon the principle that the infiltration rate is equal (approximately) to the saturated hydraulic conductivity.
4. e) both b and c. Particle size distribution analysis which includes the laboratory methods to determine the average mean size in a given sample of soil as well as a mechanical analysis are used to divide soils separately into groups depending upon their different sizes.
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