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Authors: 超级管理员 | Edit: zhangxin
Crop condition fromJanuary to April 2016 was generally about average in Iran. During this period,winter wheat was still growing and barley was harvested. Accumulated rainfall (RAIN,-2 percent) and radiation (RADPAR, -1 percent) were just below average, whilethe temperature (TEMP, +0.9°C) was above average. The agroclimatic indices forthe current season result in a decrease of the BIOMSS index by 6 percentcompared to average. The national average of the VCIx (0.66) was just above averageconditions, and the cropped arable land fraction decreased by 5 percentagepoints compared to the its five-year average.
Crop conditions abovethe five-year average are mainly distributed in Ardabil, Golestan, and NorthKhorasan provinces of the northern region, and the Khuzestan and Bushehrprovinces of the southwest area. In the central-northern region from westAzerbaijan to Hamadan, extending south and southeast as far as Fars province,the condition of crops was below or close to the five-year average during thewhole monitoring period. CropWatch puts the wheat yield variation with 2015 at +0.4percent.However, cultivated area is estimated to drop 7.1 percent (an estimate based onthe CALF value of -5 percent in table 3.1), which will eventually result in a 7percent winter wheat production drop, in spite of generally fair crops.
Figure3.17. Iran crop condition, January-April2016
(a)Crop condition development graph based on NDVI (b)Maximum VCI
(c)Spatial NDVI patterns compared to 5YA (d)NDVI profiles
