Harvesting methods in Pakistan.By Group.

Harvesting: What is Harvesting? Harvesting is a process of

cutting and gathering crops in the field.There are two Harvesting methods:

1. Manual Harvesting 2. Mechanical Harvesting

Methods Of Harvesting

Manual Harvesting:o Manual Harvesting means Cutting of crops by

using Hand tools.o For small grains, hand tools include scythe sickle

and cutlass.o Manual harvesting is tedious(Boring) and labor

intensive.

Methods Of Harvesting Mechanized Harvesting: Machines are used for harvesting.

In one category of harvesting, the whole plant is cut at or near ground level , before the economic part retrieved immediately or at a later date.

In another situation , the plant is left standing while only economic part is removed ( as is the case in picking cotton or corn)

Mechanized harvesting may be grouped into two way:

One step operation Multi step operation

Methods Of Harvesting Mechanized Harvesting: One Step operation:• In one step operation, the economic product is obtained in

a state that can be placed directly into storage ( harvesting of grains crops such as wheat and corn.)

Multi Step operation:• In multi step operation, the economic part may be

harvested along with other plant parts and left in the field for a period of curing or drying (e.g., Alfalfa)

Methods Of Harvesting

Mechanical harvesting Includes: Combine Harvesting Windrowing Picking Machines

Combine Harvesting: Combine harvesters are used to harvest field crops. (e.g.,

soy-bean, small grains).

Combine Harvesting Combine originally designed for small grains. Now, it is

widely used for other crops including corn and soybean.• Multiple operations that combine performs:

Cutting and gathering:• Combine cut the plant material and

gathered it. then it is conveyed into threshing chamber.

Threshing:• In threshing chamber, a cylinder rotates to

thresh the crop.

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Combine Harvesting:

Cleaning :• The grains fall

through sieves of appropriate sizes to clean out foreign material such as gravel.

Separating :• The straw is shaken

out of the combine onto the ground.

Handling :• The clean grains

are transported into the holding tank by mean of augers and elevators.

Windrowing:• Windrowing is the method of harvesting whereby the crop

is cut and gathered by an implement called a Windrower.• The material gathered is left in piles in rows in the field.• It brings uniformity in ripening of the product.

• The rows of harvested material are picked up for threshing

Picking Machines:• Pickers are used to remove only the economic part of the

plant that is located on an aerial part.• There are pickers for crops such as corn and cotton.

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