Pipe tobacco (Nicotiana tabacum L.) is a famous product of Hai Phong, is growing popular and get more benifit. Research on seasonal, planting density and fertilizer are made in Kien Thiet commune, Tien Lang district, Hai Phong city in the Spring season 2012. The results showed that, the crop does not affect the yield of tobacco. Planting density effects on the growth, development, leaf area index and photosynthetic performance should effect productivity
density in the range from 20,000 to 32,000 trees/ha
higher density declining yield and vice versa
planting density of 20,000 plants/ha for the highest tobacco yield (1,660.0 kg/ha). Fertilizer effects on yield and quality of products, special as a function of N. Formula 6 (300 kg N + 80 kg P2OS + 90 kg K2O/ha) for highest productivity (1648.5 kg/ha)
formula 2 (250 kg N + 80 kg P2O5 + 75 kg K2O/ha) for the lowest yield (1,438.7 kg/ha). The N most effects on the content of nicotine and total nitrogen content, nitrogen-protein, sugar content in tobacco products. K levels strongly effects the amount of chlorine in the product
formula 6 for the best quality, followed by the formula 2
fertilizer formulas remaining relatively uniform product quality.