Geo-statistical analysis of surface and sub-surface soil salinity of the irrigation block of Sardar Sarovar Canal Command
2002
Nayak, A.K. | Chinchmalatpure, A.R. | Khandelwal, M.K. | Rao, G.G. | Nath, A., Central Soil Salinity Research Institute, Anand (India). Regional Research Stn. | Munshi, H.Y., SSNL Soil Survey Office, Baroda (India | Tyagi, N.K., Central Soil Salinity Research Institute, Karnal (India)
In the study, quantitative estimates were made on the degree of spatial variation of surface (0-30 em) and sub-surface (30-90 90-150 em) soil salinity. A total of 335 samples were collected randomly at random intersection of 1. 75 km x 1.75 km of a square grid covering 25,800 ha area of 9A17 irrigation block. of Sardar Sarovar Canal Command. The descriptive statistics of the data indicated considerable variability of the soil salinity within site. The directional semi-variogram of surface and sub-surface salinity indicated that there was no effect of direction. The isotropic semi-variograms of surface and sub-surface salinity were best fitted to spherical model which indicated that the data are having spatial structure. The range of spatial dependence of soil salinity was 6.64, 5.80 and 3.32 km, respectively for surface (0-30 em) and subsurface layers (30-90 em and 90-150 em). The variance of ECe was smaller for surface soils than that for sub-surface soils. Using the spherical variogram, kriged estimates were computed by ordinary kriging and contour maps were prepared. The differences between measured and estimated values were small and the standard deviation of the estimated values was also small which indicated that the model was adequate.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Indian Council of Agricultural Research