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RISS 인기검색어
- 검색키워드
- 저자 : S. S. Kukal (검색결과 3 건)
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Assessing the impact of climate variations on wheat yield in northwest India using GIS
P. K. Kingra,Raj Setia,Jatinder Kaur,Simranjeet Singh,Som Pal Singh,S. S. Kukal,B. Pateriya 대한공간정보학회 2018 Spatial Information Research Vol.26 No.3
We analyzed the spatial and temporal variations (40 years from 1974–75 to 2013–14 with an interval of four decades) in wheat yield as influenced by the three important potential determinants (climate, fertilizers and irrigation) in the three regions (North-west, Central and South-west) of Indian Punjab. Wheat productivity in Punjab has increased linearly at 60–64 kg ha-1 year-1. Although linear increase in productivity can be attributed to technological developments but large year-to-year oscillations depicted the effects of climatic variations. Mann–Kendall and Sen’s slope estimator statistical tests indicated that majority of the trends in maximum temperature and rainfall in different regions were not significant, but there was a significant increase in minimum temperature at 0.053 C year-1 in north-east, at 0.047 C year-1 in central and 0.044 C year-1 in south-west regions of Punjab. Step-wise regression was used to assess the relative influence of three determinants (climate, fertilizer and irrigation) on yield. Minimum temperature explained 44% of variability in yield. Out of the remaining 56% variability, 44% variability in wheat yield was explained by irrigation availability and 7% by fertilizer application. The spatial interpolation showed the decade-wise shift in area towards higher productivity, higher temperature and lower rainfall during the wheat growing season.
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Spatio-temporal analysis of the climate impact on rice yield in north-west India
P. K. Kingra,Raj Setia,Satinder Kaur,Simranjeet Singh,Som Pal Singh,S. S. Kukal,B. Pateriya 대한공간정보학회 2018 Spatial Information Research Vol.26 No.4
The effects of climate, fertilizers and irrigation on rice yield and spatial variations of growing season climatic variability were analyzed in the three regions (Northwest, Central and South-west) of Indian Punjab from 1974 to 2013. There was a linear increase in rice yield in Punjab (30 kg ha-1 year-1 in north-east, 29 kg ha-1 year-1 in central and 34 kg ha-1 year-1 in south-west region) over 40 years. The results of Mann-Kendall test and Sen’s slope estimator showed an increase in minimum temperature (0.03 C year-1 in North-east Punjab and, 0.04 C year-1 each in Central and South-west Punjab) but no significant trend in maximum temperature and rainfall during the rice growing season (June–September). Among different climatic and technological variables, 49% of the variance in rice yield was explained by minimum temperature. Irrigation explained 33% of the remaining 51% variance in rice yield. The larger effect of climatic variables than fertilizer and irrigation suggest that adoption of climate smart and water conservation technologies are required to reduce rice yield variability in the future and improving food security. Spatial variations in yield, rainfall and temperature across Punjab were substantial and these have important consequences for food security by indicating the need for regionspecific technologies.
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