ICAR-Krishi Vigyan Kendra, Raichur584 001 (Karnataka)
To assess the soil test crop response (STCR) based nutrient management in direct seeded rice (DSR), demonstrations were conducted at five farmer's field during kharif 2015–16 in Tunga Bhadra Command area of Raichur, India. Three technology options (TO) were assessed and were TO1: Farmers’ practice (Imbalanced fertilization (250: 155: 133 kg/ha), TO2: Recommeded package of practices (100: 50: 50 kg/ha) and TO3: STCR equation based application of fertilizers (targeted yield: 75 q/ha). The grain and straw yield of DSR (variety BPT 5204) was found higher in TO3 (70.70 and 79.94 q/ha, respectively) and increase was to the tune of 21.5 and 21.4 per cent over TO2. The higher B: C ratio was recorded in the TO3 (2.97) and was higher by 14.67 per cent over TO1 (2.59). After harvest of crop, it was observed that there was build up of available N, P2O5 and K2O in plots with TO3 in all the five farmers field. These results clearly indicated that application of fertilizers to crops based on soil test values and target yield approach was effective in getting the higher yield.
Nutrient management, STCR, Direct seeded rice, Target yield
