In the KS05 profile, "The greatest amount of salt occurs at the surface, and in the underlying Btkz horizon as indicated by EC ." What process is responsible for high salt concentrations at the surface? (Hint: it's the same process that's at work on the Sultan Sea playa). Group of answer choices Evapotranspiration by halophytes Precipitation at depth by water table fluctuations Flooding and soil burial Capillary action and evaporation

In the KS05 profile, "The greatest amount of salt occurs at the surface, and in the underlying Btkz horizon as indicated by EC ." What process is responsible for high salt concentrations at the surface? (Hint: it's the same process that's at work on the Sultan Sea playa). Group of answer choices Evapotranspiration by halophytes Precipitation at depth by water table fluctuations Flooding and soil burial Capillary action and evaporation

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter31: Soil And Plant Nutrition

Section: Chapter Questions

Problem 10RQ: A soil consists of layers called that taken together are called a ________. soil profiles : horizon...

See similar textbooks

Similar questions

denitrification occure in wetland soil because - 1 - The top thin layer of soil is oxidized and the soil layer below is reduced. 2 - The top thin layer of soil is reduced and the soil layer below is oxidized 3 - The top thin layer of soil is oxidized and the soil layer below is also oxidized. 4 - The top thin layer of soil in reduced and the soil layer below is also reduced
In not more than 200 words or 5 sentences, answer or explain the following situation. In a seagrass ecosystem, nutrients restrict primary production under low nutrient (oligotrophic) conditions, while light becomes the limiting factor under high nutrient (eutrophic) conditions. Discuss how this happens with respect to the three primary producers (seagrass, macroalgae, phytoplankton) as the condition changes from oligotrophic to eutrophic.
With reference to the phosphorus cycle, explain the benefits of phosphate solubilizing microorganisms to plants and Discuss how the activities of symbionts in a mutualistic association can lead to microbial weathering (1000 words).
Pesticides vary in terms of their persistence in soils. Give three possible reasons for the existence of such variation.
Explain soil profile. What master horizon is characterized by organic debris in various stages of decay? What does the term topography refer to?
Soil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.
There is a general statement that "organic matter content of Pakistani soil is low" ,why?
Trace the route of the nutrients NH,", NO, and PO,² carried by river runoff to a seagrass ecosystem. Indicate the specific process involved (e.g., nitrification, denitrification, etc.) and the chemical form (e.g., NH,", NO,", etc) at each step of transformation. Write your (short) answers in the numbered blanks below each illustration.
Name two soil properties that can affect infiltration rates. How does application rate affect infiltration? Why are infiltration rates typically higher in a sandy than in a clay soil?
%OM pH EC Ca2+ Mg2+ K+ Na+ Al3+ H+ % dS/m cmolc/kg soil cmolc/kg soil cmolc/kg soil cmolc/kg soil cmolc/kg soil cmolc/kg soil 2.7% 7.6 4.5 19 13 10 3 1 4 Is this soil affected? If so, what type? - saline - sodic - not salt affected - saline-sodic
Treatment Control Soil warming Soil warming x Year * 1.0 Year * 0.5 Active Layer Seasonal N mineralization (g N/ m²/ year)
Soil organic matter (SOM) samples have charge that is pH-dependent, and measurements for the cation-exchange capacities (CECS) of soil organic matter average around 150 cmol(+)/kg SOM at neutral pH. Meanwhile, smectite clay minerals have CECS that average approximately 100 cmol(+)/kg clay. Since these two phases are the dominant contributors to soil CEC, we can use SOM content and smectite content (if we can measure it) to estimate total soil CEC. What would be your estimate for the total CEC (in cmol(+)/kg soil, to the nearest 0.1 cmol(+)/kg soil) of a soil that contained 3.28 % SOM and 1.0 % smectite clay by weight?