Assessment of spatial variability of soil fertility status in KVK farm of Pahanda in Durg district, Chhattisgarh using Gis-Gps

Abstract

The precise nutrient management is one of the most important and integral part of the modern-day agriculture. For this to happen we have to know the spatial variability of soil fertility. In this study, all soil physico-chemical properties (pH, EC, OC), Available macronutrients (N, P, K, S) and Available micronutrients (B, Fe, Mn, Cu, Zn) status with their spatial variability in KVK farm of Pahanda was quantified and based on their result soil fertility maps were prepared for respective nutrients using Arc-GIS software. Total 52 soil samples from soil surface (0-15 cm) collected from the study area and analyzed for these parameters. Soil reaction of the study area varied from neutral to saline range with EC below<1.0 dS/m for all collected samples. Soil OC content was low to medium, Soil N and P in low, Soil K medium to high fertility category and S status found to be ranging between 11.20 to 39.60 kg/ha. Also, Fe, Cu and Mn status found in medium to high range but Zn status found deficient in about 83% samples. Hot water extractable B content in 36.54% samples found in low and rest in medium fertility range. These observed spatial variability used in further fertilizer recommendation and input management based on requirement of crop plants.

Evaluation of Soil Fertility Status of Research Farm, College of Agriculture and Research Station, Katghora, Korba, Chhattisgarh

“…The soil C content was found to be low in the study area which may be due to high temperature that enhanced oxidation of native organic matter and carbon and also low rates of organic matter additions in soils. The obtained results were in line with the results obtained by research work of Meher et al [11] reported that the OC ranged from 2.7 to 7.1 g kg -1 with a mean of 4.8. g kg -1 of KVK farm Pahanda in Durg District, Chhattisgarh. Similar results were also supported by Singh et al, [12], Kumar et al, (2017), Dadsena et al [13].…”

“…The very less EC value of area may be ascribed to extensive leaching of all soluble salt to deeper layer and runoff losses from surface soil layer. The results were supported by the research work done previously by Meher et al, [11], in the soils of Pahanda Durg district in Chhattisgarh state. He concluded that the EC ranged between 0.01-0.32 d Sm -1 with an average of 0.11 d Sm -1 .…”

“…The Zn deficiency increased with increase in pH and decrease with increase in organic C. Here it can be noted that the dominant portion of the area seems Zn sufficient which might be due to the low soil pH which renders Zn in soil solution and makers it available for crops. The similar result showed the Similar observation was made by Rai et al (1970), Mehar et al, [11], Barooah et al (2020), Mandal [19].…”

“…The Mn bearing minerals in the parent material might be the reason for higher Mn content in the soils and due to better supply of Mn to rice in flooded soil as Mn is soluble in relatively acidic and reduced soil condition. The similar result showed the Mehar et al, [11], [19]. Singh et al, [15].…”

“…The study area had S status within low to medium ranged which may be due to the poor organic C reserve in soil along with the leaching and runoff losses of sulphate ions from surface layer of study area. The findings were supported by Mehar et al [11] who assessed the fertility status of the KVK farm in Pahanda. The similar results were also supported by Dadsena et al, [13].…”