Chapter 5: Interplant Interference and Competition

5.4 Law of Constant Final Yield

Vince describes the Law of Constant Final Yield which says that the amount of plant biomass (ie leaves, stems, seeds) which can be produced on a piece of land is determined by the least available input, or resource. Examples of limiting resources could be water or nutrients, among others.   Keep in mind the total amount of plant biomass produced on a field is the sum of BOTH the crop and weed plant biomass.

Y axis is yield. X axis is resources. final yield first increases, then curves to plateau as resources available increase
Figure 3.  Law of Constant Final Yield

Review and Reflection

 

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Principles of Weed Control Copyright © by Deana Namuth-Covert and Amy Kohmetscher. All Rights Reserved.