Micrometeorological measurement of pesticide vapor flux from bare soil and corn under field conditions
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Total daily pesticide flux can easily be calculated by summing the total estimated flux for each of the 2 or 4 hr observations. Interpretations of within-canopy pesticide flux profiles and evapotranspiration flux rates indicate that the pesticide flux rate during nighttime hours is zero.
No major sources or sinks for pesticide within the crop could be found, and it was concluded that the pesticide vapor flux was directly from the soil itself. Thus, vertical pesticide flux measurements made above the canopy are representative of total vertical flux rates.
It is possible to evaluate the mass horizontal flow and the downwind pattern of adsorption of pesticide vapor on untreated soil as well as dissipation into the atmosphere.
KeywordsFlux Rate Dieldrin Heptachlor Vertical Diffusivity Untreated Soil
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- Barrows, H. L., Caro, J.H., Armiger, W. H., and Edwards, W.M.: 1969, Environ. Sci. Technol. 3, 261.Google Scholar
- Bowen, I. S.: 1926, Phys. Rev. 27, 779.Google Scholar
- Caro, J. H.: 1971, Agr. Food Chem. 19, 78.Google Scholar
- Fritschen, L. J.: 1965, Bull. Intern. Assoc. Sci. Hydrol. 10, 38.Google Scholar
- Fritschen, L. J.: 1966, Agronomy J. 58, 339.Google Scholar
- Harrold, L. L. and Dreibelbis, F. R.: 1958, U.S. Department of Agriculture Technical Bulletin 1179, 166 pp.Google Scholar
- Harrold, L. L. and Dreibelbis, F. R.: 1967, U.S. Department of Agriculture Technical Bulletin 1367, 123 pp.Google Scholar
- Lemon, E. R.: 1969, Physiological Aspects of Crop Yield, pp. 117.Google Scholar
- Lemon, E. R.: 1965, Plant Physiol. 4, 203.Google Scholar
- Lemon, E. R. and Wright, J. L.: 1969, Agronomy J. 61, 405.Google Scholar
- Lourence, F. J. and Pruitt, W. O.: 1969, J. Appl. Meteorol. 8, 492.Google Scholar
- Panofsky. H. A., Blackadar, A. K., and McVehil, G. E.: 1960, Quart. J. Roy. Meteorol. Soc. 86, 390.Google Scholar
- Pruitt, W. O. and Lourence, F.: 1966, Tests of Aerodynamic, Energy Budget and Other Evaporation Equations Over a Grass Surface, Final Report 1965. Investigations of Energy, Momentum, and Mass Transfer Near the Ground, United States Army Electronics Command, Atmospheric Sciences Laboratory, p. 37.Google Scholar
- Sellers, W. D.: 1965, Physical Climatology, U. of Chicago Press, Chicago, Illinois, 271 pp.Google Scholar
- Tanner, C. B.: 1968, Evaporation of Water from Plants and Soil, Water Deficits and Plant Growth (ed. by T. T. Kozlowski), Academic Press, New York, p. 73.Google Scholar
- Thornthwaite, C. W. and Hare, F. K.: 1965, Meteorol. Monogr. 6, 163.Google Scholar
- Uchijima, Z. and Wright, J. L.: 1964, Bull. Nat. Inst. Agr. Sci. A11, 19.Google Scholar
- Webb, E. K.: 1965, Meteorol. Monogr. 6 (7).Google Scholar
- Wright, J. L. and Lemon, E. R.: 1966, Agronomy J. 58, 265.Google Scholar