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- W2372638537 abstract "Based on analysis of the physical and chemical properties of soil samples collected from He'nan tobacco planting regions,the index system of soil fertility suitability of tobacco was established.S-or parabola-type dependence functions were developed according to their effects on tobacco crop and the function value was also calculated.AHP was applied to judge the weight of each evaluation factor.Then the integrated index va1ues for every evaluation unit were obtained.Based on all the above,the fertility map of He'nan tobacco planting regions was drawn with MAPGIS.It is found that the whole Xinyang city and the west of Nanyang are the highly suitable regions,which is 1.18×104 hm2,accounting for 13.69% of He'nan tobacco planting regions.It is due to that there is rich in organic matter and total N,and there is suitable pH value in the soils in this regions.There are suitable areas for planting tobacco crops in Zhumadian,Xuchang,Pingdingshan and Luoyang city,because there are medium Cl-contents,and there is rich in available P and available K in these regions,which is 3.03×104 hm2,accounting for 35.01% of He'nan tobacco planting regions.There are less suitable regions in the northern and eastern parts of the investigated regions because of too higher contents of Cl-and pH,and too lower contents of available P,which is 4.24×104 hm2,accounting for 48.86% of He'nan tobacco planting regions." @default.
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- W2372638537 date "2011-01-01" @default.
- W2372638537 modified "2023-09-27" @default.
- W2372638537 title "Studies on Comprehensive Evaluation of Soil Fertility in He'nan Tobacco Planting Regions Based on Fuzzy Mathematics and Principal Component Analysis" @default.
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