Saline sodic Study guides, Class notes & Summaries
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SCSC 301 Exam IV TAMU Dr. Feagley Questions With Complete Solutions
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A soil with a pH of 8.0, 10% exchangeable sodium, and 5 dS/m conductivity is: 
 
-saline, non-sodic 
-non-saline, non-sodic 
-non-calcareous 
-saline, sodic 
-non-saline, sodic correct answer: saline, non-sodic 
 
The most economical means of decreasing the soil pH from 7.0 to 4.5 in a non-calcareous soil is by the addition of: 
 
-neutral salts 
-gypsum 
-ferrous sulfate 
-nitrogen fertilizer 
-agricultural limestone correct answer: ferrous sulfate 
 
With the passage of time, the soil pH t...
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Certified Crop Advisor Western Region Exam With 100% Correct Answers
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Certified Crop Advisor Western Region 
Exam With 100% Correct Answers 
Size of sand and its characteristics - answer.05mm to 2.0mm, lower CEC, lower water 
holding capacity 
Size of silt - answer.002mm - .05mm 
Size of Clay - answerless than .002mm 
Define bulk density - answerthe ratio of the mass of soil to its bulk volume. expressed in 
g/cm3 
How does bulk density differ with soil texture - answersandy soil has higher bulk density 
because has less overall pore space. 
Bulk density ranges of...
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Scsc 301 Exam 4 Questions With Complete Solutions
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A soil having a pH of 8.0, 10% exchangeable sodium, and 5d/sm conductivity is: correct answer: saline, non sodic 
 
the most common means of decreasing the soil pH from 7 to 4.5 in non calcareous soil is by the addition of: correct answer: Ferrous sulfate 
 
With the passage of time, the soil pH tends to: correct answer: decrease 
 
A compound that is recommended to be used as an agricultural liming material is: correct answer: CaMg(Co3)2 
 
Calcium Carbonate reacts with the carbonic acid in...
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SCSC 301- Exam 4 with Questions and Answers
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SCSC 301- Exam 4 with Questions and Answers 
 
Given values of soil pH, salt concentration, and % exchangeable sodium, distinguish among nonsaline, nonsodic, saline, saline-soidic, and sodic soils, and describe possible means of reclaiming such soils for crop growth. ANSWER Nonsaline - greater than 8.5 and as high as 9 or above because of sodium being on the exchange site, they hydrolyze into sodium carbonate and sodium bicarbonate in the soil solution. 
 
Saline soil vs. non-saline soil - elect...
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CRSS/ FANR 3060 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+
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1 
CRSS/ FANR 3060 EXAM 1 | QUESTIONS 
& ANSWERS (VERIFIED) | LATEST 
UPDATE | GRADED A+ 
soil 
Correct Answer: -layer(s) of generally loose mineral and/or organic material 
-affected by physical, chemical, & biological processes 
-usually hold liquids, gases and biota and support plants 
-non-renewable resource 
soil functions 
Correct Answer: anchorage for plants 
storage and recycling of nutrients 
regulate water supply 
habitat for many organisms 
engineering medium 
2 
transformations 
C...
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SCSC 301- SPRING 2024 Exam with Questions and Answers
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SCSC 301- SPRING 2024 Exam with Questions and Answers 
 
A soil having a pH of 8.0, 20% exchangeable sodium, and 5 dS conductivity is: ANSWER saline, sodic 
 
The most economical means of decreasing the soil pH from 7.0 to 4.5 in a non-calcareous soil is: ANSWER sulfur 
 
With the passage of time, the soil pH tends to: ANSWER decrease 
 
The compound that can be used as an agricultural liming material is: ANSWER CaCO3 
 
Calcium Carbonate reacts with the carbonic acid in the soil solution to for...
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CCA EXAM INT. Study Guide 2023/2024
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Which of the following is negatively charged? 
a. anion 
b. cation 
c. AEC 
d. hyperion - correct answer a. anion 
 
Cations are held on the CEC by _______ charges on clay and organic matter. 
a. neutral 
b. gravitational 
c. positive 
d. negative - correct answer d. negative 
 
Which of the following clays contributes most to CEC if the same amount of each clay is present? 
a. montmorillonite 
b. hydroxyapatite 
c. illite 
d. kaolinite - correct answer a. montmorillonite 
 
Potassium fixat...
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SCSC 301 Exam 4 verified answers 100%2023
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SCSC 301 Exam 4 verified answers 100%2023 
 
Saline/ Non-sodic - correct answer -White alkali 
-Soil flocculated and permeable 
-Leaching occurs with large quantities of water (25 inches) 
 
Non-saline/ Sodic - correct answer -Black alkali (the worst of all) 
- not permeable (no leaching) 
- add Ca salt (gypsum) to replace all the exchangeable Na (2x normal rate) 
-salt concentration in soil will increase (EC will increase) 
- Gypsum will not contribute to pH change 
-Ca replaces exchange...
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Scsc 301 Exam 4
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Scsc 301 Exam 4 
 
A soil having a pH of 8.0, 10% exchangeable sodium, and 5d/sm conductivity is: - correct answer saline, non sodic 
 
the most common means of decreasing the soil pH from 7 to 4.5 in non calcareous soil is by the addition of: - correct answer Ferrous sulfate 
 
With the passage of time, the soil pH tends to: - correct answer decrease 
 
A compound that is recommended to be used as an agricultural liming material is: - correct answer CaMg(Co3)2 
 
Calcium Carbonate reacts with ...
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