How is tobacco grown? Detailed answer

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How is tobacco grown? Detailed answer

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How is tobacco grown?

The tobacco plant reaches 1-2 meters in height. The leaves are large, from half a meter to a meter in length. They are covered with long, soft hairs that contain a resinous sap. There are many ways to grow this plant, but each requires great care. Tobacco seed is mixed with fertilizer and grain or fed with cottonseed before sowing. In warm regions, beds with seedlings are covered with cotton cloth.

Greenhouses are made in cold regions. In 6-10 weeks, the seedlings grow to 20 cm. The plants develop 4-6 leaves and are ready to be transplanted into the field, which is prepared and fertilized in advance. When the plants begin to bloom, the top of each is cut off, that is, the head of the seed bud is removed. This is done so that the leaves grow stronger and have a more juicy color. 3-4 months after transplanting the seedlings in the field, the plants are ready for harvesting.

Two cleaning methods are used: priming and trimming the stem. When priming, each leaf is torn off separately when it is ripe. Weekly 2-4 leaves are separated from the plant. This process takes 5-8 weeks. When cutting the stem, the whole plant is cut off at once.

After harvesting, the tobacco must be dried. It is necessary to dry the sheet to acquire the desired color. The tobacco leaf is dried by heat, in the air or in the sun. When dried by heat, green leaves are hung in small sheds, which are heated by heat. The stem-cut tobacco is air-dried. Other types of tobacco are tied to sticks and hung out in the sun. The last stage of tobacco preparation is maturation. This is necessary to soften the leaf and improve the taste.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What birds are national?

The concept of "national bird" was defined by the XII conference of the International Council for the Protection of Birds (Tokyo, 1960).

The first national bird in the world was the bald eagle (since 1782 the national symbol of the United States), the second - a subspecies of the Javanese peacock Pavo muticus spicifer (since 1940 the national symbol of Myanmar), the third - the motley pheasant (since 1947 the national symbol of Japan). Subsequently, some other birds were recognized as national.

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Budget microcontrollers Microchip PIC16F152 11.10.2020

The world leader in the production of 8-bit controllers - Microchip - has released a new series of controllers based on the PIC architecture.

The PIC16F152 is a general purpose controller family designed to reduce the cost of a variety of sensors, meters and real time controllers. The family includes 14 devices with a memory range from 3,5 to 28 kB in packages from 8 to 44 pins.

To reduce the cost of devices, the set of peripherals has been simplified and includes only the most necessary modules: a 10-bit ADC, one 8-bit and two 16-bit timers, two 10-bit PWM modules, one USART transceiver and one SPI / combo module. I2C. To increase flexibility, Peripheral Pin Select (PPS) technology is used, which allows you to reassign the pins used by the peripherals.

To evaluate the capabilities of the Microchip series, it did not provide a specialized debug board and offers to use universal debugs for PIC controllers in PDIP packages - Curiosity Development Board for devices in the PDIP-20 package and Curiosity High Pin Count (HPC) Development Board for devices in the PDIP-40 package.

Characteristics of microcontrollers PIC16F152:

Operating frequency up to 32 MHz
Up to 28 KB Flash, up to 2 KB SRAM
10-bit ADC, up to 28 channels
Reference voltage generation module
Two 10-bit PWM modules
Ability to reassign peripheral pins - Peripheral Pin Select (PPS)
Ability to create Flash memory partitions - Memory Access Partition (MAP)
Device ID storage area - Device Information Area (DIA)
Serial interfaces: 1 x USART, 1 x SPI, 1x I2C
Up to 36 general purpose I/O ports
Microcontrollers are available in packages:
8 pins (SOIC and DFN)
14 pins (SOIC and TSSOP)
16 pins (VQFN)
20 pins (PDIP, SOIC, SSOP and VQFN)
28 pins (SSOP, SOIC and VQFN)
40 pins (PDIP and VQFN)
44 pins (TQFP)
Supply voltage range from 1,8 to 5,5 V
Operating temperature range from -40 to 125°C.

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