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Related Concept Videos

The Calvin Benson Cycle01:46

The Calvin Benson Cycle

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...
C4 Pathway and CAM01:27

C4 Pathway and CAM

Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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.
Light Acquisition02:16

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
Primary Production01:06

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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

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Related Experiment Video

Updated: May 9, 2026

Cereal Crop Ear Counting in Field Conditions Using Zenithal RGB Images
11:49

Cereal Crop Ear Counting in Field Conditions Using Zenithal RGB Images

Published on: February 2, 2019

Crop yield gaps in Cameroon.

Genesis T Yengoh1, Jonas Ardö

  • 1Department of Physical Geography and Ecosystem Science, Geobiosphere Science Centre, Lund University, Sölvegatan 12, 223 62, Lund, Sweden, yengoh.genesis@lucsus.lu.se.

Ambio
|August 9, 2013
PubMed
Summary
This summary is machine-generated.

Cameroon

Related Experiment Videos

Last Updated: May 9, 2026

Cereal Crop Ear Counting in Field Conditions Using Zenithal RGB Images
11:49

Cereal Crop Ear Counting in Field Conditions Using Zenithal RGB Images

Published on: February 2, 2019

Area of Science:

  • Agricultural Science
  • Food Security Studies
  • Spatial Modeling

Background:

  • Cameroon faces food security challenges despite general yield increases.
  • The 2008 food price crisis highlighted vulnerabilities in meeting population food needs.

Purpose of the Study:

  • To assess Cameroon's potential for increasing crop yields and food production.
  • To identify factors contributing to yield gaps in major food crops.

Main Methods:

  • Fuzzy set theory for biophysical suitability modeling.
  • Linear regression to analyze yield trends over 50 years.
  • Yield gap analysis comparing farmer fields and research stations.

Main Results:

  • Crop yields have generally increased since 1961, influenced by agricultural policies.
  • Most food crops are grown in suitable biophysical areas.
  • Significant yield gaps exist between farmer practices and research station potential.

Conclusions:

  • Biophysical suitability is not the primary constraint for the yield gap.
  • Agronomy and policy factors are key drivers of yield gaps.
  • Improving soil nutrient management is crucial for enhancing food production.