By Planting Corn One Year and Beans the Next on a Given

question 61

Multiple Choice

By planting corn one year and beans the next on a given plot of land,or by planting alfalfa as a cover crop during the off-season,a farmer reduces the need for ___________ because beans and alfalfa fix nitrogen in the soil.

• A)herbicides
• B)pesticides
• C)inorganic fertilizers
• D)expensive irrigation techniques
• E)harvesting machinery

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Definitions:

Reaction

A chemical change that occurs when substances combine or decompose forming new compounds.

Boiling Point

The temperature at which a liquid’s vapor pressure equals the external pressure surrounding the liquid, causing it to turn into vapor.

Molecules

The smallest unit of a chemical compound that can exist, composed of two or more atoms bonded together chemically.

Compound Name

The designation of a chemical substance based on its composition and structure.