Plant Science Unit 1 Test Review

In agriculture the term horticulture applies to:

In a soil profile parent material is found in the _____ horizon

Plants lose water through

In a soil profile the highest amount of organic matter is concentrated in the ______ horizon

Vertical zonation is a term applied to vegetation zones defined by

Water is

Cultivating plants has no effect on the ecosystem

Agricultural ecosystems are:

Soil is composed of

Autotrophs are

This is a well balanced ecosystem?

The biggest source of carbohydrates come from

Agronomy is the study of

Parent material, topography, biology, climate and time are all:

Which textural class of soil will have the highest water holding capacity?

Cultivation of plants reduced the need to:

What is the difference between climate and weather?

Natural ecosystems are very

Fungi are ________ components in an ecosystem.

Why should a little meat be included in the diet?

The change in plant communities over time is known as

The hardest factor to manipulate in agriculture is

A __________ is made up of all of the populations of organisms of different species in an area

A collection of ecosystems with similar soil, climate and biological composition are called:

Water is a ________ component in an ecosystem.

Which is not a type of chemical weathering

All niches in a natural ecosystem are:

An organic molecule contains

The largest soil particle is

Voids between soil solids are called

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The smallest level in an ecosystem is:

From the year 1900 to 2000 the rural population has

Which is not a problem facing agriculture?

Water is taken into the atmosphere by

Evapo-transpiration dictates to farmers:

A specie's unique way of surviving in its environment, is called a

A natural ecosystem is:

Any plant that grows where it is unwanted is a __________

Infiltration rate is influenced by all but which one

Which textural class of soil will have the highest CEC