Exam 37: Soil and Plant Nutrition

A group of ten tomato plants are germinated and maintained in a large tray with no drainage. After several weeks they all begin to wilt and die despite repeated watering and fertilization. The most likely cause of this die-off is ________.

The B horizon of soil has ________.

Which of the following soil minerals is most likely leached away during a hard rain?

Which one of the following elements plays a critical role in the formation of chlorophyll?

The highest amount of oxygen will be found in soils containing large amounts of ________.

The specific relationship between a legume and its mutualistic Rhizobium strain probably depends on

A major function of magnesium in plants is to be ________.

Some of the problems associated with intensive irrigation include all of the following except

Which of the following is a primary difference between ectomycorrhizae and endomycorrhizae?

Which of the following experiments is the best way to determine if an element is essential for plant growth?

A plant developed a mineral deficiency after being treated with a fungicide. What is the most probable cause of the deficiency?

Which of the following would inhibit the growth of most plants?

Which one of the following micronutrients plays a critical role as a component of chlorophyll?

The inorganic nutrient most often lacking in crops is

Micronutrients are needed in very small amounts because

Roots acidify the soil solution by releasing ________ and pumping ________ into the soil.

Which of the following are problems associated with intensive irrigation? I mineral runoff II over fertilization III aquifer depletion IV soil salinization

You are weeding your garden when you accidentally expose some roots of your pea plants. You notice swellings (root nodules)on the roots, and there is a reddish tinge to the ones you accidentally damaged. Most likely your pea plants ________.

Nitrogen fixation is a process that ________.

Why is nitrogen fixation an essential process?