The Energy Budget at the Earth's Surface: Assessing Sources and Sinks of Carbon Dioxide in a Corn Crop Using a Momentum Balance Approach

Lemon, E.R. and Wright, J.L. (1967) The Energy Budget at the Earth's Surface: Assessing Sources and Sinks of Carbon Dioxide in a Corn Crop Using a Momentum Balance Approach. Research and Development Technical Report No. 2-68I-1. US Army Electronics Command.

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Abstract

In two previous communications (Wright and Lemon 1966a, 1966b) an
aerodynamic method was described for evaluating the source and sink
distribution of carbon dioxide in plant communities. Some data were
presented for a corn crop, giving quantitative information about
photosynthetic fixation and respiration release of carbon dioxide, layer
by layer, within the crop.
In the method, CO2 concentration profiles and windspeed measurements of
the bulk air were made within and above the crop. The analysis of the
windspeed measurements to calculate diffusivity coefficients required
tedious analysis of windspeed fluctuations and the application of
complicated statistical and mixing length theories. It is our purpose
to present here a simpler method, requiring vertical profiles of mean
windspeed, vertical profiles of mean carbon dioxide concentration and
representative vertical profiles of the foliage surface area density of
the plant community.

Item Type:	Technical Bulletin
NWISRL Publication Number:	0107
Subjects:	Irrigated crops > Corn / maize Research methodology Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:58
Last Modified:	26 Oct 2016 16:41
Item ID:	1187
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1187