Vol. 11, Issue 3 (2022)

Author(s):
Porkodi G, R Shanmugasundaram, P Saravanapandian, C Swaminathan and K Kumutha

Abstract:
The present study was conducted to determine the spatial distribution and degree of risk of Fe deficiency in major groundnut growing soils of Cuddalore District, Tamil Nadu, India using statistics and geostatistics. By using grid points, three hundred geo-referenced surface soil samples (0-15 cm) from 300 panchayat village of major groundnut blocks (Kurinjipadi, Vridhachalam and Kammapuram) of Cuddalore district, Tamil Nadu were collected and analyzed for pH, EC, OC, free CaCO₃ and DTPA-Fe. Analytical data was interpreted and statistical parameters like range, mean, standard deviation and coefficient of variation were calculated. Geostatistical analyses were also carried out, including experimental variogram. Soil fertility maps were prepared for each parameter under GIS environment using ArcGIS v10.2.2. Further, with the ordinary kriging, spatial distribution map showed that the Fe is sufficient for plants in the all the three blocks of Cuddalore Districts the probability map produced based on indicator kriging showed that Fe sufficient was noticed in 100% of crops grown area of the Vridhachalam, Kurinjipadi and Kammapuram block in Cuddalore district. The correlation analysis showed that Fe was significantly and negativily correlated with OC highly in Vridhachalam block and significantly and positively correlated in Kurinjipadi and Kammapuram block.