Grain crops refers to harvested seeds of various grass food crops. Examples are wheat, corn, barley and oat.
The economic differences between subsistence and commercial agriculture are:
- Subsistence agriculture is done to provide food for the family for the purpose of feeding while commercial agriculture is to provide food for the society in large quantity for the purpose of making profit.
- Subsistence agriculture is done by family members without cash reward while commercial agriculture is a source of employment to the population.
The environmental impact of agriculture is the degradation or deterioration of the soil when done over a long period of time.
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