Exam 37: Soil and Plant Nutrition

For this pair of items, choose the option that best describes their relationship. (A)The number of essential macronutrients required by plants (B)The number of essential micronutrients required by plants

Most crop plants acquire their nitrogen mainly in the form of

Carnivorous plants have evolved mechanisms that trap and digest small animals. The products of this digestion are used to supplement the plant's supply of

For this pair of items, choose the option that best describes their relationship. (A)The amount of nitrogen in a fertilizer marked "15-10-5" (B)The amount of nitrogen in a fertilizer marked "15-5-5"

Organic molecules make up what percentage of the dry weight of a plant?

For this pair of items, choose the option that best describes their relationship. (A)The amount of molybdenum in a gram of dried plant material (B)The amount of sulfur in a gram of dried plant material

Hyphae form a covering over roots. Altogether, these hyphae create a large surface area that helps to do which of the following?

What should be added to soil to prevent minerals from leaching away?

Reddish-purple coloring of leaves, especially along the margins of young leaves, is a typical symptom of deficiency of which element?

Which soil mineral is most likely leached away during a hard rain?

Which two elements make up more than 90% of the dry weight of plants?

Which of the following essential nutrients plays an essential role in the opening and closing of the stomatal aperture?

What is the major function of sodium in plants?

The fungal hyphae of both ectomycorrhizae and arbuscular mycorrhizae absorb water and minerals, which they supply to their plant hosts.

Draw a simple sketch of cation exchange, showing a root hair, a soil particle with anions, and a hydrogen ion displacing a mineral cation.

In what way do nitrogen compounds differ from other minerals needed by plants?

A growing plant exhibits chlorosis of the leaves of the entire plant. The chlorosis is probably due to a deficiency of which of the following macronutrients?

Among important crop plants, nitrogen-fixing root nodules are most commonly an attribute of

Figure 37.1 shows the results of a study to determine the effect of soil air spaces on plant growth. Figure 37.1 -The best conclusion from the data in Figure 37.1 is that the plant

Mycorrhizae enhance plant nutrition mainly by