Nutrient management in cotton is complex due to the simultaneous production of vegetative and reproductive structures during the active growth phase. Lot of spatial variation in soil available nutrients is observed under similar management situation. In view of this an experiment was conducted to study the precision nutrient management by assessing status of soil nutrients in cotton growing area for precision application of nutrients.  Bisanahalli cotton belt is selected for this study. The study area is a centre place of cotton growing belt in Haveri district of northern Karnataka consisting of both red soils (Alfisols), deep black soils (Vertisols) and mixed red and black soil. Totally, 178 samples were collected from 40 hectare cotton growing area at 40 m grid. The location of the sample was recorded using GPS. The experimental site distributed from latitude: 14o 56’ 53.6’’ to 14o 57’ 54’’ N and longitude 75o 14’ 34.4” to 75o 15’ 12” East.  The samples were processed and analyzed for available nutrients status.  Results show that, spatial variability observed with respect to all chemical properties between soil types and within each class of soil. The soil pH varied from 5.66 to 7.32, and 6.12 to 8.6, EC varied from of 0.07 - 0.84 and 0.08 to 0.24 dS/m, organic carbon from 0.74 and 0.68 % in red and black soil, respectively. Major nutrient status shows that, 60 per cent of the soil samples were low and 40 per cent samples were medium in available N status. With respect to P, 4 per cent samples were low and 96 per cent samples were medium in available status. Available K status was medium (86%) to high (14%). Available Fe and Zn status were deficient to the extent of 38 and 4 percent as against higher levels in 60 and 36 percent in red and black soil, respectively. Available Cu ranged from 0.66 to 3.6 ppm with higher levels in all grids. Available Mn was in the range of 0.26 to 20.6 ppm.  Based on this soil fertility status, a field experiment on precision farming in cotton was carried out on an area of 55.84 ha by planning target yields of 20 and 25 q/ha, for Alfisols and 25 and 30 q/ha for Vertisols.  The soil fertility maps for different nutrients are generated using Arc GIS. Total area was delineated in to 4 management zone (MMM, LMM, MMH and LMH in red soil and MMM, LMM, MHM and LMH in black soil) based on available nutrient status and near neighbor wood classification. The required soil nutrient maps were generated based on site specific nutrient management (SSNM) concept by considering soil available status, crop uptake/ ton of seed cotton yield, and the target yield. As such, variable rate applicators (VRA) are not available at Indian conditions, hence, variable rate of nutrients were applied manually according to the management zone. The results revealed that, the seed cotton yield target of 20 and 25 q/ha was achieved in Alfisols and Vertisols, respectively  at all the nutrients status. However, we could able to achieve only 88 percent of the higher target (25 and 30 q/ha seed cotton yield, in Alfisols and Vertisols, respectively) due to prolonged dry spell during peak boll development stage and soil moisture constraints.