World J Clin Cases
January 2023
In this paper, the spatial distribution pattern of the total nitrogen, available nitrogen, available phosphorus and total phosphorus in surface purple soil (0-20 cm) with a city region were analyzed by applying geostatistics combined with GIS. The spatial distribution pattern of the four soil nutrient parameters were quantitatively described with semivariogram and the soil nutrient content distribution pattern was constructed by using Ordinary Kriging and lognormal Kriging optimal interpolation. The results indicated that total nitrogen, available nitrogen showed a normal distribution, the others with a lognormal distribution; the analyst of semivariogram indicated that the total nitrogen showed the pure nugget effect with the nugget of 0.
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