WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 19, Problem 8SA
Summary Introduction
To analyze:
Why adding nitrogen to soil increases plant growth.
Introduction:
Nitrogen is one of the six elements needed in large quantities for plant growth.
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Why is the Nitrogen content of Fertilizers so important?
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Chapter 19 Solutions
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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- What is the importance of air in soil?arrow_forwardThe practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Crop rotation would allow the farmer to reduce which of the following? a) Planting seeds. b) Watering the fields. c) The use of manufactured fertilizer. d) The burning of fossil fuels by farm equipment.arrow_forwardWhy is nitrogen important to living things? What type of organism is responsible for making nitrogen available to plants?arrow_forward
- Soil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.arrow_forwardHow are soils formed? Through the breakdown of what material? Why are new soils not suitable for most plant species?arrow_forwardWhat controls the partitioning of carbon between growth and repiration? and Why the efficiency of converting sugars into new biomass is relatively constant?arrow_forward
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