Certified Crop Advisor- Soil and Water Mgt Exam Questions With 100% Correct Answers

Certified Crop Advisor- Soil and Water Mgt Exam Questions With 100% Correct Answers Which of the following is negatively charged? - answeranion Cations are held on the CEC by _____ charges on clay and organic matter . - answerPositive Which of the following clays contributes most to CEC if the same amount of each clay is present ? - answermontmorillonite Potassium fixation occurs when which of the following clays is present in soil ? - answerIllite If a soil has an EC of 0.6 siemens meter and contains 20 percent sodium on the CEC , it is a _________soil . - answersaline - sodic What is the textural class of soil that is 10 percent clay and 35 percent sand ? - answerSilt Loam Which of the following increases as a soil's clay content increases ? - answerSurface Area Which of the soil textures listed below has the highest porosity and lowest bulk density ? - answerClay The maximum value for plant available water is_____________. - answerThe difference field capacity and wilting point Which of the following textural classes has the largest potential available water ? - answersilt loam Which kind of soil structure would be typical for a good seed bed ? - answerGranular Soil structure modifies the physical properties of soil_____________. - answerTexture Good structure in the subsoil improves ________________. - answerroot elongation Soil microorganisms cause_________ in soil structure when crop residues are added to soil . - answerIncreases The bulk density of 100 cm³ of dry soil that weighs 145 g is_______ g / cm³ . - answer1.45