module 02 Harvesting
 lesson 05 Field drying, hauling and piling or stacking
 obj 1 To describe field drying, hauling and piling or stacking.
fielddrying hauling piling

What can happen with the crop between the cutting process and the threshing process?
  1. Field drying: the cut crop is left on the field to dry
  2. Hauling: the crop is transported elsewhere, usually to the place where it will be threshed
  3. Stacking or piling: The crop is put onto stacks or piles until it can be threshed
  The problem with field drying and stacking
In many traditional harvesting systems farmers leave their harvested rice in the field for a long time. Because they wait for the thresher or because they want to pre-dry the paddy.

In this “field drying”, the rice plants are often stacked in piles with the panicles inside to protect them from rain, birds and rats.

stacked harvest
Field drying should be avoided Insides these piles, it gets very hot. This has some consequences:
  • Molds will grow quickly and infest the grains.
  • Discoloration of the grain can happen within the first day of field drying.
  • Also the grains that are already dry can absorb water again from the straw which is still wet. This will make the grains crack, giving less head rice after milling.


The problem with hauling
If the crop needs to be transported for a long way before it can be threshed, there is a risk of a high handling loss. This means that grains are lost during lifting, hauling, stacking, pouring, and bagging of the crop. (You will learn more on handling losses in lesson 9)

To minimize handling losses, it is important to handle the crop with care when hauling.

Next lesson

In the next lesson we will discuss the different threshing methods.


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