IHA Education April Webinar - Sun Gro Nutrition & Fertilization Made Easy

2.

What types of fertilizer formulations are generally regarded as acid froming - Decreasing medium pH?

20-10-20 / 20-20-20
13-2-13 / 15-0-15
Excel
Controlled release fertilizer

Correct Answer

A. 20-10-20 / 20-20-20

Explanation

The fertilizer formulations 20-10-20 and 20-20-20 are generally regarded as acid-forming and can decrease the medium pH.

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3.

What is the term that is used to describe a fertilizer's ability to change pH?

Potential acidity / basicity
Ammoniacal nitrogen
Parts per million
Alkalinity

Correct Answer

A. Potential acidity / basicity

Explanation

The term "potential acidity / basicity" is used to describe a fertilizer's ability to change pH. This refers to the fertilizer's capacity to either increase (acidity) or decrease (basicity) the pH level of the soil it is applied to. The pH level of the soil plays a crucial role in determining the availability of nutrients to plants, so understanding a fertilizer's potential acidity or basicity is important in determining its suitability for specific soil conditions.

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4.

What is the most important piece of information you need to have to design a fertilization program for a greenhouse grower?

Alkalinity test
Soil test
Fertilizer label
Complete water analysis

Correct Answer

A. Complete water analysis

Explanation

To design a fertilization program for a greenhouse grower, the most important piece of information needed is a complete water analysis. This analysis provides crucial information about the composition and quality of the water being used for irrigation. It helps determine the levels of various elements and minerals present in the water, which can affect the nutrient balance in the soil. By knowing the water's composition, the grower can make informed decisions about the types and amounts of fertilizers to use, ensuring optimal plant growth and health.

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1

5.

What nutrient is often lacking in plants when the pH of the medium is high and results in the newer growth showing an interveinal-chlorosis?

Molybdenum
Nitrogen
Iron
Magnesium

Correct Answer

A. Iron

Explanation

When the pH of the medium is high, it can result in a deficiency of iron in plants. This is because iron becomes less available to plants in alkaline conditions. Iron is an essential nutrient for plants and is required for the synthesis of chlorophyll. When there is a lack of iron, the newer growth of the plant may exhibit interveinal chlorosis, which is the yellowing of the tissue between the veins while the veins remain green.

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6.

What type of meter can be used to help easily measure and injectors accuracy?

Solu-bridge
Conductivity meter
EC meter
All of the above

Correct Answer

A. All of the above

Explanation

All of the above options can be used to help easily measure and injectors accuracy. A solu-bridge is a device that measures the conductivity of a solution, which can be used to determine the accuracy of an injector. Similarly, a conductivity meter and an EC (electrical conductivity) meter are also used to measure the conductivity of a solution, indicating the accuracy of an injector. Therefore, all three options are valid choices for measuring and ensuring the accuracy of injectors.

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7.

What is the substance in limestone that causes a soil or a growing medium to increase pH?

Calcium
Magnesium
Carbonate/Bicarbonate
Gypsum

Correct Answer

A. Carbonate/Bicarbonate

Explanation

The substance in limestone that causes a soil or a growing medium to increase pH is carbonate/bicarbonate. Limestone is primarily composed of calcium carbonate, which reacts with water and releases carbonate and bicarbonate ions. These ions increase the alkalinity of the soil or growing medium, raising the pH level.

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8.

What plants are notorious for showing iron / maganese toxicities in the greenhouse?

Scaveola
Geranium
Hardy or garden Mums
Pansies

Correct Answer

A. Geranium

Explanation

Geranium plants are notorious for showing iron/manganese toxicities in the greenhouse. This means that when these plants are grown in a greenhouse environment, they are more prone to experiencing toxicity issues related to iron and manganese. These toxicities can negatively affect the health and growth of geranium plants, potentially leading to stunted growth, leaf discoloration, and other detrimental effects. Therefore, it is important for greenhouse growers to carefully monitor and manage the levels of iron and manganese in the soil and provide appropriate treatments to prevent these toxicities in geranium plants.

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Iha Education April Webinar - Sun Gro Nutrition & Fertilization Made Easy

What is the name for the measurement that tell us particular water's ability to change medium pH?

Quiz Preview

What types of fertilizer formulations are generally regarded as acid froming - Decreasing medium pH?

What is the term that is used to describe a fertilizer's ability to change pH?

What is the most important piece of information you need to have to design a fertilization program for a greenhouse grower?

What nutrient is often lacking in plants when the pH of the medium is high and results in the newer growth showing an interveinal-chlorosis?

What type of meter can be used to help easily measure and injectors accuracy?

What is the substance in limestone that causes a soil or a growing medium to increase pH?

What plants are notorious for showing iron / maganese toxicities in the greenhouse?