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Modeling seedling johnsongrass (Sorghum halepense) emergence as influenced by temperature and burial depth
Published online by Cambridge University Press: 12 June 2017
Abstract
Research was conducted to formulate a seedling johnsongrass emergence model as influenced by temperature and burial depth using the poikilotherm rate equation. A series of constant-temperature growth chamber experiments with johnsongrass seed buried at various depths in fritted clay was conducted to develop a temperature/burial emergence database. The poikilotherm rate equation was fit to the emergence data from burial depths of 0 to 2.5 cm at constant temperatures between 20 and 44 C. These data were then combined to formulate a single poikilotherm rate equation to model the emergence of seedling johnsongrass from 0 and 2.5 cm deep and 20 to 44 C. This combined model was validated against two independent emergence data sets with good results.
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- Weed Biology and Ecology
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- Copyright © 1998 by the Weed Science Society of America
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