In present study GPS based 531 soils samples were collected, analysed in the lab of Department of Soil Science and Agricultural Chemistry Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur during 2018-2020. Data obtained were statistically interpreted. Results suggested that the soils of the domains were found neutral to slightly alkaline in soil reaction, safe in electrical conductivity, high, low, medium and low in Bhopal, Jabalpur Vidisha and Hoshnagabd domains in organic carbon content and non-calcareous nature. Result revealed that the N, P, K and S denoted as low-L medium-M, high-H, and found to be (M-L-H-M); (L-M-H-M); (L-M-H-M); (L-M-M-M); and (L-H-M-M) in Bhopal, Jabalpur Vidisha and Hoshnagabad domains, respectively. However, in AESR10.1 as whole, revealed that organic carbon was found to be medium and macronutrients were analyzed to be L-M-M-M hence the severity of deficiency occurred in the order of N > S > P > K. The results could be used as a basis for site specific fertilization in order to supply the optimum requirements for plant growth.

Present study was conducted in the Department of Soil Science JNKVV, Jabalpur during 2018-2020. GPS based 531 soil samples were collected from each domain viz., Bhopal, Jabalpur, Vidisha and Hoshangabad of 10.1 Agro ecological sub region (AESR). The samples analyzed for soil organic carbon (SOC) and calcium carbonate (CaCO3) then soil organic carbon density (SOCD), total organic carbon density (TOCD), soil inorganic carbon density (SICD) and total carbon density (TCD) in Mg C ha-1 were calculated. The results of SOCD, TOCD, SICD and TCD ranged from 4.73 to 25.12, 9.22 to 48.98, 1.00 to 21.29 and 11.08 to 68.80 Mg C ha-1 with mean value of 12.19, 23.78, 7.58 and 31.36 Mg C ha-1 in AESR 10.1 and Coefficient of variation (CV) 37.58, 37.58, 50.88 and 31.24 %. The overall trend in SOCD was Bhopal > Vidisha > Jabalpur > Hoshanagabad and SICD was Vidisha > Hoshanagabad > Jabalpur >Bhopal while TCD was in trend of Bhopal > Vidisha > Hoshangabad> Jabalpur. Geo-statistical indicated that Ordinary Kriging used and all variogram were in isotropic form. In Bhopal domain, Gaussian model best fitted for of SOCD, TOCD, and TCD but spherical model for SICD. In Jabalpur domain, exponential domain best fitted for TCD and TOCD but for SICD, spherical model and for SOCD, Gaussian model is best fitted. In Vidisha domain, exponential model best fitted for all. In Hoshangabad domain, exponential model is best fitted for SOCD and TOCD and Gaussian and J-Bessel model best fitted for TCD and SIC, respectively. The nugget/ sill (N/S) ratio was <25% which exhibit strong SD only for SICD in Bhopal domain. The N/S ratio was found to be >25% but <75% which showed moderate SD, for SOCD, TOCD and TC, TOCD, SICD and TCD; SOCD, TOCD, SICD and TCD and SOCD, TOCD, SICD and TCD in Bhopal, Jabalpur, Vidisha and Hoshangabad domain, respectively. The correlation range (m) for SOCD, TOCD, SICD and TCD are 5448.413, 4809.535, 360.522, and 5113.050; 7201.044, 6601.044, 611.651, and 8438.711; 5734.559, 7334.398, 1323.773, and 7881.289 and 5418.684, 5433.206, 8887.656, and 1836.274 in Bhopal, Jabalpur, Vidisha and Hoshangabad domain, respectively. The carbon density was found in order of Jabalpur> Hoshangabad >Vidisha > Bhopal.

The findings of present study suggested that the pH in soils neutral to slightly alkaline safe in electrical conductivity and low to medium in organic carbon content. Metals concentration was below the permissible limits at 200,400,600 and 800 m, from both side of Omati Nala, in rainy and winter seasons, respectively. In water, pH ranged from 6.5 to 8.5 and EC under permissible range. However, Pb and Cr were comparatively higher than the Indian permissible limits. The concentration of Ni, Cr and Cd in rice, wheat and Brinjal was higher than the limit given by WHO/Indian standard. The transfer factor was recorded for these metals in order of Brinjal, followed by the Spinach and Tomato. Result revealed that, the pH had negatively correlated with OC (r=-0.252*) and Cr (r=-0.413**) in rainy season and similar relationship with EC(r=-0.601**), OC (r=-0.356**), Cd (r=-0.696**) and Pb (r=-0.619**) in winter season. While, it had significant positive relationship with Cr (r=0.304**). In winter season, the EC had positive and significant relationship with OC (r=0.239*), Cd (r=0.366**) and Pb (r=0.420**). In rainy and winter seasons, the OC showed significant positive relationship with Ni (r=0.305**), Cd (r=0.279*) and Pb (r=0.232*) and Cd (r=0.333**) and Pb (r=0.240*) respectively. The Cd in soil showed significant and positively related with Ni and Cd content in plant. Multivariate analysis results revealed that, the variables are correlated with two principal components in which 64.61 and 66.89% of the total variance were extracted in rainy and winter seasons respectively. The first component with 40.56 and 43.56 % of variance comprises Ni Cd and Pb and pH, EC, OC, Cd and Pb with high loadings whereas; the second component contributes pH, EC, OC and Cr and Ni and Cr at 24.04 and 23.32% total variance in rainy and winter seasons, respectively. Clustering result grouped all sampling sites into nine and seven zones on the basis of spatial similarities among sites and differences among different groups in rainy and winter seasons, respectively. In rainy season, 1, 2, 3 and 4 zones were containing higher heavy metal concentrations than the zone 5,6,7,8 and 9 whereas in winter season, zone 1, 2, 3, 5 and 6 had higher concentrations of metals than the zone 4 and 7.

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Organic inputs have been reported to increase P availability in P-fixing soils and humic substances enhance the bioavailability of P fertilizers in acidic soils (Hua et al., 2008). Decomposition products from manure such as humic acids and citrate were reported to have greater affinity for Al oxides than for PO 4 . The term available-P is often used to describe