Question

Compare a modern combine harvester with the traditional manual harvesting. Describe the processes in no more than 300 words +/- 25 and DRAW a fully labelled detailed diagram of a modern combine harvester displaying the details of its operations. Other sources may be used if you wish but must always be accompanied by a full reference to the source.

Answer 1

Harvesting is the gathering of ripe crops from the fields .It is an operation of cutting,picking,plucking and digging or a combination of these process for removing crops from underground or above ground or removing the useful part or fruits from plants.

Manual harvesting includes slicing and tearing action .manual harvesting make use of traditional threshing tools, animals for trambling and hand using sharp knives or sickles.Harvesting can be done by 1.manually operated tool 2.animal drawn machine 3.mechanically operated machine. sickle is a simple harvesting tool.It is used for harvesting crops and cutting other vegetations

Threshing is the process of beating paddy leaves inorder to separete seeds or grains.Manual methods are treading by feet,beating stalks against boards.Pedal threshers are also used in manual haresting.the freshly threshed grains must be dried in the sun. Milling is done by hand, hand pounding method is used.Mortar or pestle is used.cleaning and hulling is done by rolling the rice between stones.

modern combine harvester : This is a machine designed to efficiently harvest a variety of grain crops.Threshing, winnowing and cleaning can be performed by the machine.The combine harvester combines all operations from paddy harvesting to rice extraction.mechanical threshing removes rice grains from rice plant, speed up threshing and reduces manual labour.

Self proppeled type and mount type (according to the source of power) ; crawler type and wheel type(according to movement) are the different types of modern combine harvester.

working

Feeding the standing crop to the cutter -------- cutting the crop ---------- feeding the crop to threshing unit --------- separating the husk from the grains--------- cleaning the grain.