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Related Concept Videos

Competition02:34

Competition

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When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
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Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
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Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
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Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
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The outcome of any hypothesis testing leads to rejecting or not rejecting the null hypothesis. This decision is taken based on the analysis of the data, an appropriate test statistic, an appropriate confidence level, the critical values, and P-values. However, when the evidence suggests that the null hypothesis cannot be rejected, is it right to say, 'Accept' the null hypothesis?
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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Related Experiment Video

Updated: Mar 13, 2026

Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice Oryza sativa ssp.
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Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice Oryza sativa ssp.

Published on: January 28, 2020

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Prospects for Weed Control Through Crop Interference.

Nicholas Jordan

    Ecological Applications : a Publication of the Ecological Society of America
    |February 1, 1993
    PubMed
    Summary

    Crop interference suppresses weeds early for effective nonchemical weed control. Identifying crop traits for early interference can enhance weed management strategies.

    Area of Science:

    • Agricultural Science
    • Agronomy
    • Plant Science

    Background:

    • Crop interference is a key nonchemical weed control method.
    • Distinguishing crop interference (weed suppression) from crop tolerance (yield loss) is crucial.
    • Early crop interference prevents weed resource consumption and future seed bank increases.

    Purpose of the Study:

    • To present a path analysis model for quantifying crop-weed interference.
    • To estimate the magnitude of early versus late crop interference.
    • To identify crop traits contributing to early weed interference.

    Main Methods:

    • Path analysis was used to model crop-weed interference.
    • The model was applied to soybean varieties and common cocklebur.
    • Analysis focused on identifying traits for strong early interference.

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    Last Updated: Mar 13, 2026

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    Main Results:

    • The study provides a model to estimate early and late crop interference.
    • Crop varieties exhibiting strong early interference were identified.
    • Traits associated with enhanced early interference were pinpointed.

    Conclusions:

    • Crop interference can be enhanced through breeding and management.
    • Benefits and costs, including yield impacts, require evaluation.
    • Further mechanistic understanding is needed to optimize crop interference while minimizing yield losses.