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Concepts
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Concepts
Roots experience stress from climate before this part of the plant.
What is the shoots, leaves, (above-ground plant)?
This explains why Louisiana crops rarely experience cold failure but still face frequent stress.
What is the dominance of heat, water variability, and soil oxygen limitations over cold stress?
This reproductive failure in corn under heat stress directly limits yield potential.
What is pollination failure?
This is the fundamental trade-off controlled by the stomata.
What is water loss vs. carbon dioxide gain?
This term describes the sequence from climate stress to reduced yield through multiple plant processes.
What is the stress cascade?
Fertilizer cannot fix this type of stress.
What is water stress?
This climate characteristic increases plant respiration at night, reducing net carbon gain.
What are warm nighttime temperatures?
Soybeans can partially recover from drought due to its compensatory ability.
What is the ability to compensate with later growth or pod set?
Rapid stomatal closure in vegetables leads to this immediate physiological consequence.
What is reduced photosynthesis?
This management principle emphasizes choosing crops suited to Louisiana conditions rather than relying on inputs.
What is matching crop to climate?
This occurs when multiple stress factors affect the plant step-by-step.
What is the stress cascade?
High humidity contributes to this plant-level issue affecting transpiration efficiency.
What is reduced evaporative cooling / limited transpiration efficiency?
Vegetables prioritize this trait over yield under stress, making them highly sensitive economically.
What is quality?
This hormone signals stomatal closure during drought conditions.
What is abscisic acid (ABA)?
This is why fertilizer applications cannot compensate for drought conditions.
What is water limitation controls nutrient uptake regardless of availability?
Annual plants prioritize protecting this.
What is reproduction?
Frequent alternation between drought and flooding leads to this type of root stress pattern.
What are stress cycles (episodic root stress)?
Cotton demonstrates this relative characteristic under drought compared to other field crops
What is relative drought tolerance?
Excess water limits plant growth primarily by restricting this essential root requirement.
What is oxygen availability?
Annual crops differ from perennials because they prioritize this under stress.
What is reproduction over survival?
In Louisiana, succes often depends more on this than inputs like fertilizer.
What is timing/installation (management timing)
This concept explains why identical temperatures can have different effects depending on duration.
What is heat accumulation (number of days above threshold temperature)?
Orchard systems are uniquely vulnerable because stress impacts this beyond current season.
What is next-season productivity (perennial carryover effect)?
This explains why nutrient deficiencies often appear during both drought and flooding.
What is limited nutrient uptake due to impaired root function?
This is often more important than inputs in determining crop success in Louisiana’s climate.
What is timing (planting/installation timing)?