Series of experiments were conducted at BRRI farm, Gazipur. In all seasons, unit plot size was 4 - ×5 - m and surrounded by 30 - cm bund and 50 - cm drain. Rice was transplanted at 20 - × 20 - cm spacing and grown on submerged soil (5 - 10 cm water depth). The experiments were laid out in a randomized complete block (RCB) design with three replications. The treatment combinations were: 56 kg N ha-1 + spraying magic growth (MG) five times (T1 ) , 56 kg N ha-1 ( T2 ), 75 kg N ha-1 ( T3 ),75 kg N ha-1 + spraying MG twice (T4 ) , 38 kg N ha-1 ( T5 ) and no fertilizer (T6 ). A basal dose of PKSZn @10 - 37 - 7 - 1 kg ha-1 was used. Twenty - seven - day - old seedlings of BRRI dhan43 was transplanted on 14 June 2012. Seedlings used in T1 where sprayed with MG liquid fertilizer at 12, 22 days after sowing (DAS) and one day before transplanting. The concentration of MG liquid fertilizer was 2ml L-1 water for an area of 3 - × 1.5 - m seed bed. Nitrogen was applied on 10 and 25 DAT at 34 and 17 kg N ha-1, respectively. Spray of MG at 96 ml 48L-1 water + 600g urea/33 dec) was done in the afternoon at 25 and 40 DAT. Similar amount of MG was sprayed in the main field in T4. In other treatments, N was applied at basal, 25 and 39 DAT in equal splits. At maturity, the crop was harvested from 5 m2 area at the centre of each plot and grain yield was adjusted to 14% moisture content and straw yield was recorded from 16 hills.The treatment combinations were: 51 kg N ha-1 + 4 kg N ha-1 from urea spraying with MG five times (T1 ), 56 kg N ha-1 (T2 ), 75 kg N ha-1 ( T3 ), 75 kg N ha-1 + spraying MG twice (T4 ), 38 kg N ha-1 (T5 ) and no fertilizer (T6 ). A basal dose of PKSZn @10 - 37 - 7 - 1 kg ha-1 was used. Forty - eight - day - old seedlings of BR22 were transplanted on 11 September 2012. In T1, MG was sprayed as in T. Aus. Similar amount of MG alone was sprayed in the main field in T4. In T1, N was applied in two splits: 1st top - dress at 15 DAT (34 kg N ha-1 ) and 2nd top - dress at 27 DAT (17 kg N ha-1 ). In other treatments N was applied in three equal splits (at basal, 25 DAT and 43 DAT). Data were recorded as like as T. Aus. The treatment combinations were: no fertilizer (T1 ), 50 kg N ha-1 (T2 ), 50 kg N ha-1 + 6 kg N ha-1 from urea spraying with MG seven times (T3 ), 100 kg N ha-1 (T4 ), 100 kg N ha-1 +6 kg N ha-1 from urea spraying with MG seven times (T5 ), 50 kg N ha-1 ( T6 ), 75 kg N ha-1 ( T7 ),100 kg N ha-1 ( T8 ), 125 kg N ha-1 ( T9 ) and 150 kg N ha-1 ( T10 ). A basal dose of PKSZn @ 20 - 60 - 10 - 2.2 kg ha-1 was used. Fifty - three - day - old seedlings of BRRI dhan29 were transplanted on 22 January 2013.The treatment combinations were: no fertilizer (T1 ), 50 kg N ha-1 (T2 ), 50 kg N ha-1 +6 kg N ha-1 from urea spraying with MG three times (T3 ), 100 kg N ha-1 (T4 ), 100 kg N ha-1 +6 kg N ha-1 from urea spraying with MG three times (T5 ), 50 kg N ha-1 ( T6 ), 75 kg N ha-1 ( T7 ), 100 kg N ha-1 ( T8 ), 125 kg N ha-1 ( T9 ) and 150 kg N ha-1 ( T10 ). A basal dose of PKSZn @ 20 - 60 - 10 - 2.2 kg ha-1 was used. Sixty - four - day - old seedlings of BRRI dhan29 were transplanted on 4 February 2013. There was no spray at seed bed. In T2 and T3, N was applied at 14 DAT (33 kg N ha-1 ) and 29 DAT (17 kg N ha-1 ). In T4 and T5, N was applied at 14, 29 and 44 DAT equally. In other treatments, N was applied at basal, 26 and 48 DAT equally. Data were recorded as in T. Aus. In T4, T5 and T6, N was applied on soil in two splits. In T4 and T5, 20% at 7 DAT and 30% at 27 DAT while in T6 25% at 7 DAT and 35% at 27 DAT. In T4 and T6, 10% N of STB but in T5, 15% N of STB were sprayed three times with MG. In T2 and T10 only MG (no N) was sprayed. In other treatments, N was applied at 7, 27 and 47 DAT equally. A basal dose of PKSZn @ 17 - 60 - 20 - 4 kg ha-1 was used. The test rice variety was BRRI dhan28. Roots of the seedlings were dipped in a solution containing KCl and MG according to supplier’s recommendation. Data were recorded as in T. Aus.