Available Phosphorus Levels Are Constrained in Alkaline and Salt-Affected Soils

question 35

Multiple Choice

Available phosphorus levels are constrained in alkaline and salt-affected soils because of _____.

• A)high iron and aluminum levels
• B)high exchangeable sodium levels
• C)high calcium and magnesium levels
• D)high manganese levels
• E)low hydrogen ion levels

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Definitions:

Multiple Regression Model

A statistical technique that uses several explanatory variables to predict the outcome of a response variable.

Dependent Variable

A variable whose value depends on that of another, used in experiments to test the effects of changes in an independent variable.

Regression Analysis

A statistical method for estimating the relationships among variables, often used for forecasting and predicting outcomes.

High-low

A technique used in accounting and finance to estimate fixed and variable costs by analyzing the highest and lowest levels of activity.