Abstract:
Wheat is one of the major food crops in Pakistan. According to Pakistan Economic Survey, the total national wheat production was almost 26 million tonnes which was 9.1 % of the entire agricultural produce and its contribution towards gross domestic product (GDP) was 1.7 %. About 21% of the total national wheat production comes from Sindh province. Due to climate variation in Pakistan, dates of sowing and harvesting of wheat crops vary in inter and intra-province. Water scarcity, rapid population growth, urbanization, and food insecurity are major global issues. Crop water productivity (CWP) and eficiency measures can play a vital role in meeting the United Nations Sustainable Development Goals. Crop production can be the yield, biomass, or grain and the amount of water that can be supplied water or actual evapotranspiration (ETa). The growth period of wheat in Thatta district (lower part of Sindh province), is 100-120 days. The growth period of any crop is divided into four stages: initial crop development, mid-season, and late season. Current study was conducted during 2017-18 at district Thatha, Pakistan and the objective of this study was to calculate the CWP of wheat in the Thatta district by using METRIC EEFLUX (Mapping Evapotranspiration at high Resolution with Internalized Calibration) processed Imagery. Cloudless images of landsat 8 from October 25, 2017, to March 18, 2018, were used to calculate actual evapotranspiration (ETa) for all four stages of wheat by using ArcMap. CWP was calculated by using cumulative seasonal ETa and crop yield data. The results indicated that CWP in the Thatta district was 1.1 kg/m3, which was higher than the average CWP of Pakistan.
Page(s):
383-388
DOI:
DOI not available
Published:
Journal: Journal of Agricultural Research, Volume: 59, Issue: 4, Year: 2021
Keywords:
Pakistan
,
Wheat
,
Remote Sensing
,
Evapotranspiration
,
Crop water productivity
,
Arc map