Wheat varieties recommended for- i. Irrigated timely sown (18-25 November): PBW 343, HD 2733 , K0307 , CBW 38 , K 9107 and DBW 39 (Yield 30-35 q ha-1). ii. Irrigated late sown (15-22 December): K 0911, HI 1563, NW 2036, HUW 234 and DBW 14 (Yield 25-30 q ha-1), iii. Irrigated very late sown (1-7Jan): HI 1563, NW 2036 and DBW 14 (Yield 20-25 q ha-1), iv. Rainfed timely sown (10-15 November) HD 2888, MACS 6145, K 8027 and C 306 (Yield 15-20 q ha-1) v. Salt tolerant wheat varieties: KRL 19, KRL 210 and KRL 213 (Yield 20-25 q ha-1).
Zero tillage (tillage for sowing only) in sandy loam to silty loam soils after kharif rice advances wheat sowing for a week or two and minimizes the cost of cultivation resulting in economic return.
Application of 2,4-D-E (500 g a.i./ha), Carfentrazone (20 g a.i./ha), Metsulfuron (4g a.i./ha) and Metsulfuron+ carfentrazone (Ready mix) (25 g a.i./ha) at 30-35 DAS was found to be most effective method of controlling broad-leaved weed flora in wheat field. Only single hoeing at 21 DAS has been proved to be effective labour-saving method as compared to single manual weeding.
Direct seeding of rice and surface retention /incorporation of rice straw increased productivity in rice-wheat system.
Line spacing of 15 and 17.5 cm produced higher wheat yield.
18th November has been found be the ideal date of sowing in new alluvial zone of West Bengal- after that wheat yield decreased @ 33 kg/ha/day.
Temperature regime of Max. Temp. 27-320C and Min. Temp. 18-220C was found to be favourable for the Leaf Blight disease development under new alluvial zone of West Bengal. Wheat seed treatment by Vitavax powder @2.5 g/kg of seed and foliar spray of Propiconazole @ 0.1% was found to be highly effective against foliar blight of wheat.
