Figure 4. Heat stress-affected area per block (administrative division below district level, whereas district is administrative division below the state level) and estimated production penalty per block (bubble size) in Nellore district, Andhra Pradesh, India during 2017 rabi season. Total rice area was estimated using rule-based algorithm processing of SAR data [20]. Heat stress-impacted areas were assumed for rice subjected to high temperature during reproductive stage based on temperature trend during this rabi season in the area. Production loss is estimated as product of yield loss and the area affected by heat stress. Yield loss due to heat stress is calculated using ORYZA crop simulation model. : Spatial Assessment of Heat Stress Impact on Rice Production in Two Districts of Andhra Pradesh, India : Science and Education Publishing

Figure 4. Heat stress-affected area per block (administrative division below district level, whereas district is administrative division below the state level) and estimated production penalty per block (bubble size) in Nellore district, Andhra Pradesh, India during 2017 rabi season. Total rice area was estimated using rule-based algorithm processing of SAR data [20]. Heat stress-impacted areas were assumed for rice subjected to high temperature during reproductive stage based on temperature trend during this rabi season in the area. Production loss is estimated as product of yield loss and the area affected by heat stress. Yield loss due to heat stress is calculated using ORYZA crop simulation model.

World Journal of Agricultural Research. 2018, 6(1), 10-14 doi:10.12691/wjar-6-1-3