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AN ECONOMIC RESPONSE MODEL OF HERBICIDE APPLICATION FOR WEED CONTROL
Author(s) -
Pannell David J.
Publication year - 1990
Publication title -
australian journal of agricultural economics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.683
H-Index - 49
eISSN - 1467-8489
pISSN - 0004-9395
DOI - 10.1111/j.1467-8489.1990.tb00497.x
Subject(s) - weed control , weed , yield (engineering) , agronomy , weed science , crop yield , economic threshold , mathematics , agricultural engineering , biology , engineering , physics , botany , pest analysis , thermodynamics
A biologically realistic model of crop yield response to herbicide application is presented. It includes functions for weed mortality from herbicide application and yield loss due to surviving weeds. The optimal herbicide rate and two types of decision thresholds are derived theoretically and illustrated with empirical examples. Responses of the various decision criteria to changes in parameters are also examined theoretically and empirically. A multidimensional threshold for weeds based on weed density and weed‐free yield is presented. The issue of farmers using other than officially recommended herbicide rates is discussed.