Saline sodic - Study guides, Class notes & Summaries

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...

Define anion and cation. - ANS Anion: negatively charged atom or molecule. Examples include phosphate, sulfate, nitrate, and chloride. Cation: A positively charged atom or molecule. Examples include calcium, magnesium, sodium, potassium and ammonium. Define cation exchange capacity and anion exchange capacity. - ANS CEC is the amount of positively charged cations which can be held by a given weight of soil. Cations are held by negative charges in clay and organic matter. AEC is th...

Which of the following is negatively charged? anion cation AEC hyperion - ANS anion cations are held on the CEC by ______charges on clay and organic matter neutral gravitational positive negative - ANS negative which of the following clays contributes most to CEC if the same amount of each clay is present? montmorillonite hydroxyapatite illite kaolinite - ANS montmorillonite potassium fixation occurs when which of the following clays is present in soil? ...

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...

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...

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...

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...

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...

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...