Question 1

Irrigation of a saline-sodic soil with water very low in salts could lead to the formation of a sodic soil.

Accepted Answer

A) True 
 B)False

Question 2

The growth of plants on sodic soils is constrained by all but one of the following:

Accepted Answer

A)  caustic influence of high pH caused by sodium carbonate and bicarbonate 
B)  toxicity of bicarbonate and other anions 
C)  low micronutrient availability due to high pH 
D)  oxygen deficiency due to breakdown of soil structure or 
E)  toxicity of very high levels of calcium carbonate 
A)  caustic influence of high pH caused by sodium carbonate and bicarbonate 
B)  toxicity of bicarbonate and other anions 
C)  low micronutrient availability due to high pH 
D)  oxygen deficiency due to breakdown of soil structure or 
E)  toxicity of very high levels of calcium carbonate

Question 3

Gypsum plus irrigation reduces the pH of sodic soils by replacing sodium from the exchange complex and removing it from the soil.

Accepted Answer

A) True 
 B)False

Irrigation of a saline-sodic soil with water very low in salts could lead to the formation of a sodic soil.

The growth of plants on sodic soils is constrained by all but one of the following:

Gypsum plus irrigation reduces the pH of sodic soils by replacing sodium from the exchange complex and removing it from the soil.

The Soils Around Us

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

Soil and the Hydrologic Cycle

Soil Aeration and Temperature

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters

Exam 9: Soil Acidity, Alkalinity, Aridity and Salinity

Irrigation of a saline-sodic soil with water very low in salts could lead to the formation of a sodic soil.

The growth of plants on sodic soils is constrained by all but one of the following:

Gypsum plus irrigation reduces the pH of sodic soils by replacing sodium from the exchange complex and removing it from the soil.

The Soils Around Us

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

Soil and the Hydrologic Cycle

Soil Aeration and Temperature

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters