Exam 35: Plant Nutrition

A common consequence of nutrient deficiencies in plants is chlorosis, which is ____.

A mutant soybean plant that is unable to produce leghemoglobin will most likely suffer from ____ deficiency.

The soils in which most plants do best are ____.

The ____ horizon tends to accumulate mineral ions but relatively little organic matter, and is generally penetrated by mature tree roots?

Ectomycorrhizae hyphae pass through the walls of the cells in the root cortex.

Soil particles composed of decomposing organic matter are called ____.

Bacteroids are ____.

Why are hydroponics used in mineral nutrition experiments examining essential elements?

The ____ horizon is the most fertile soil layer, where the roots of most herbaceous plants are located?

Plants usually grow best in sandy soils.

Epiphytes are ____.

Root nodules are ____.

Which element is not considered an essential micronutrient for plants in general, but is required by horsetails and perhaps some grasses such as wheat?

Studies of a soybean plant ( Glycine max ) and the bacterium Bradyrhizobium japonicum have shown that after the bacterium enters the root, cells of the root cortex begin to divide in response to ____.

Leaf chlorosis is not likely to be caused by a deficiency in ____.

In arid regions, a deep root system is more common than a shallow-but-broad system.

Imagine that you are a farmer who chose not to rotate your crops with soybeans even though the local extension agent recommended that you do so. Which deficiency symptom in your crops should indicate to you that the extension agent's advice was correct?

A soil that is mostly ____ will tend to dry quickly compared to other soil types.

Experiments have shown that even if it is supplied by no other means, plants near the ocean can get enough of the essential micronutrient ____ from the air, and plants can also get this essential micronutrient from sweat from a person's hands.

Research in Colorado's San Juan Mountains has illustrated that in comparison to stands of lodgepole pine and Englemann spruce, stands of trembling aspen are not likely to ____.