Please help me to check if there is any grammatical mistake.
Also, how the sentence can be written in a better manner.
Thank you!
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The objective of pruning is to produce strong and healthy plants, which involves removing diseased or damaged wood, thinning the crown to increase the air flow and removing crossing brunches. It is a simple but boring and repetitive. Workers normally need one to two days to get familiar with the pruning techniques. They can prune a tree in less than five minutes once they get used with it.
They work five to six days a week and eight hours per day. The salary is based on the number of tree pruned, it means the faster you work, the more you get. As a result, everyone works as fast as they can, some workers even do not eat or drink in that eight hours.
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