Why does EAC have a maximum value of 0.75? What would be the likely effect on plant yield if this value declined to a very low level?© BrainMass Inc. brainmass.com October 24, 2018, 5:34 pm ad1c9bdddf
Please see the attached document...
Plants require a number of different mineral elements for healthy growth, elements which may already be available in the soil or may need to be added in the form of fertilizers. Some of these elements are needed in relatively large amounts (the macro-nutrients) and others in very small amounts (the micro-nutrients). One of the most important macro-nutrients, one that is frequently in short supply, is nitrogen. This may seem strange when the atmosphere contains 80% nitrogen. Unfortunately this nitrogen is in a gaseous form (N2) that plants are unable to use. Plants must obtain nitrogen in the form of nitrate (NO3-) or ammonia (NH3) and these forms are much less abundant.
There are organisms that can 'fix' or convert gaseous nitrogen into ...
Clear explanations and a Word document are given.
Investigation of the Biotic and Abiotic Structure and Function of an Ecosystem
Choose one of the following ecosystems:
- Where might this type of ecosystem be located? Give one specific example.
- Describe the structure of the ecosystem: List both the abiotic components and biotic components
- Describe the function of the ecosystem: How do the abiotic and biotic components interact in biogeochemical cycles?
- Describe both the carbon and nitrogen cycles
- Describe disturbance and recovery: Describe one natural and one human caused disturbance to the ecosystem. Explain the damage to the ecosystem, including how the abiotic and biotic characteristics of the ecosystem changed.
- Explain how ecosystems recover naturally based on resilience mechanisms and the theory of secondary succession.