depends where the farm is, what you're growing and where you're farming.
I would imagine agriculture and animal husbandry.
As much as the field need.
Water is used in agriculture for irrigation and used as recreation for water sports and swimming pools.
Where you been? Water must be delivered to growing things by rain or irrigation of water. Few plants or you - cannot exist without water. Water to a plant is like blood to an animal or human being. You have to have it.
irrigation
mathematics is used in agriculture when there are situations such as quantity of water and fertilizer to be applied.
Most of the water in the Middle East is used for drinking, residential commodities, and agriculture.
agriculture
for drinking and agriculture
Water is used to grow crops.
Water is used to grow crops.
water is used in industries in preparing many of the chemical substances and in agriculture it is used for planting crops and irrigation purposes and for providing water for photosynthesis in plants.