Residual effect
The impact of fertilizers or pesticides applied in previous seasons on the current crop growth and soil characteristics.
Также говорят: carry-over effect, residual action, residual activity
The residual effect refers to the persistence of nutrients or active chemical ingredients in the soil that continue to influence plant growth after the initial application period. Understanding this phenomenon is crucial for cost-effective nutrient management and optimizing crop rotation strategies.
Practitioners must carefully consider the persistence of herbicides and the mineralization rate of organic fertilizers. Typical mistakes include ignoring the labeled plant-back restrictions for herbicides, which can lead to severe crop injury, and failing to adjust current season fertilizer applications based on the nutrient carry-over from high-input preceding crops.