GB/T 23221-2008Rules for cultivation of flue-cured tobacco (English PDF)

5.1 plot selection

The cultivation of tobacco in a sunny flat plot selection, terracing, hills, slopes less than 25 °.

5.2 tobacco soil physical properties

Flue-cured tobacco suitable for cultivation on light loamy soil, loamy soils or in sandy and gravelly containing heavy loamy and light clay soil. Hirakawa area of sand or light loam soil

Loamy soil is more appropriate, hilly areas most suitable places to the light loamy soil loamy soil.

Suitable for the development of tobacco soil tilth, soil structure as a granular, granular structure and growth of small structures.

Tobacco quality topsoil soil physical traits range of values, soil bulk density of 1.10g/cm3 ~ 1.35g/cm3, total soil porosity

> 50%, the maximum effective soil water holding capacity of 15% to 25% (by mass).

5.3 tobacco soil chemical properties

Production of quality tobacco to moderate soil fertility is appropriate. Suitable soil organic matter content to around medium fertility level of the soil organic matter

Content range is appropriate. Soil nitrogen content and northern Huanghuai tobacco area medium fertility Tobacco is 40mg/kg ~ 65mg/kg, soil

Available phosphorus content > 10mg/kg, potassium content > 100mg/kg. Nitrogen content of tobacco-growing areas south of 60mg/kg ~ 150mg/kg,

Available phosphorus content of about 10mg/kg, potassium content >=80mg/kg.

Flue-cured tobacco optimum soil pH of 5.5 to 6.5. Soil cation exchange capacity of 10cmol/kg ~ 20cmol/kg dry soil.

Soil salinity < 0.1%. Soil chlorine content <=30mg/kg.