(a) a summary of the national economic significance of tobacco production: (1) is one of the major cash crops in the country; (ii) to meet the needs of the tobacco industry; (iii) an important source of state revenue; and (iv) an important way for mountain farmers to escape poverty and wealth. 2 treasure 1, with a 30 per cent increase in the price of red flowers. 3-b-iv: implementation of scale, mechanization, specialization and information on tobacco production; new triation: basement of the supply of tobacco material, characterization of the quality of tobacco leaves and modernization of production methods. 4 characteristics of roasted smoke production: (1) quality is the first objective of production; (2) production is multi-chain, highly technical and high input; (3) is sensitive to environmental conditions; (4) pests and diseases are more numerous; (5) use is single and production is planned. 5 tobacco cultivation: a science of research on tobacco, environment, agronomic practices and related relationships. The biological basis of roasted smoke cultivation is the origin of the second spread in the south-central americas: it reached china at the end of the sixteenth century. First to taiwan, then to the south-west (1938)3 botanical classification: tobacco belongs to eggplant, tobacco is first discovered to be 66 species, but only yellow and common tobacco are used by humans by product: rolls, cigars, piped cigarettes, water, nose smokes and chewing. By quality characteristics, production techniques and uses: roasted smoke, tan, dry smoke, white rib smoke, spice smoke, yellow fireworks. The organs of the baked smoke are made of roots: root, side, and variable. Function: absorption of water nutrients, fixed support above ground, synthetic pyrotechnic. Root distribution: 0-50 cm (80-90%) wide (80 cm diameter), actual production - 20 cm (farming layer) tubing structure: nodes and nodes. Function: transport, storage, support of leaves. Each armpit has a main sprouts, two to three by-breeds, and it's growing faster at the top. The number of single leaves (less than 20-30, more than 70) is better in size. (a) the birth area of the leaves: the three main areas are the lower part (foot, two below, 7-8), the upper part of the centre (6-8), the upper part (7-8 above); the five small areas are foot leaves (3-4 pieces), lower brooms (about 4 pieces), lower lobes (7-8 pieces), upper brooms (around 4 pieces), upper lobes. Quality order: foot leaves — top leaves — bottom two — upper two — back leaves. Base towers, simple, olive. Quality: towers, simple, area coefficients for olive leaves, actual area/(leaf length x width) / one-basket period of roasted smoke birth (ranging from 60 to 90 days) (1) seeding period (sowning-transferling) (sowning-planting) seedlings: foliage is spread flat and green; seed embryos grow 70 per cent of the seeds, requiring wet beds, 10°c, minimum 17°c, maximum 30°c (2) crucifixion, first, two real leaves intersecting with two leaf leaves. The tobacco is weak and warm and humid. (3) accumulation of dry matter over 90 per cent during the root period (3rd leaf - 7th leaf) (3,4) rat owl (6,7) (4) seedling (seventh leaf - seedling) in the second daejeon period (100-130 days) (b) long-term (still-receiving) maturation of around 25 days (now-receiving) of about 70 days, with high-quality, hot and hot-temperature crops of high-quality smoke, with a maximum of 25 - 28°c above the ground (8 - 38°c) and slow growth of 20°c; underground (7 - 43°c), with a maximum of 31 - 32°c light-sight-photo precipitation phase (400 - 520mm), soil type: purple earth (including k height), yellow-border lime soil; soil quality: sandy border; ph:—; fertility: medium upper - medium upper - medium upper, organic content of 2%, quick effect n40-40 mg/kg, p, rich in k, with a volume of n less than 30 ppm; terrain: 800 - 1200 m tobacco production and 1 leaf production factor: tobacco production = number of units x single leaf (i) major factors affecting yields and quality are the number x single leaf weight 2 (i) varieties; and (ii) cultivation management conditions (first, the size of the leaves may be high, yield may be high, quality reduced and vice versa, when the density is too high); second, underweight, malnourished and of poor quality; third, top-to-top technology regulates the quality and production of tobacco leaves
