Topic summary
Crop failures
Extracted from the Wikipedia article Harvest.
Crop failure
Crop failures can be caused by catastrophic events such as plant disease outbreaks (such as the Great Famine in Ireland), volcanic eruptions (such as the Year Without a Summer), heavy rainfall, storms, floods, or drought, or by slow, cumulative effects of soil degradation, too-high soil salinity, erosion, desertification, usually as results of drainage, overdrafting (for irrigation), overfertilization, or overexploitation.