Agriculture accounts for approximately 70% of the world's freshwater withdrawals.

Contour irrigation is a method of farming that follows the contours of the land, rather than being a type of irrigation system.

The primary purpose of a dam in an agricultural context is to store water for irrigation, ensuring a reliable water supply for crops.

Flood irrigation is commonly used for crops that require a lot of water, such as rice. Wheat, corn, and soybeans are typically grown using other irrigation methods.

Poor drainage is the primary cause of waterlogging in agricultural areas, as it prevents excess water from draining away.

Deforestation is not a direct environmental impact of agricultural water use, but it can be a contributing factor to water scarcity and other environmental issues.

Crop rotation is primarily used to improve soil fertility by alternating crops with different nutrient requirements and root structures.

Fertigation is the application of fertilizers and other chemicals through irrigation systems, and is not a water conservation practice.

The primary purpose of a water audit in agriculture is to identify water leaks and inefficiencies in irrigation systems and water management practices.

Using treated wastewater for irrigation can potentially reduce fertilizer costs, improve soil structure, and increase crop yields, but it does not directly reduce water pollution.

The primary purpose of a water rights system in agriculture is to allocate water resources among users, ensuring fair and equitable distribution of water for irrigation and other agricultural purposes.

Thermal pollution is not typically caused by agricultural activities, but rather by industrial processes that discharge heated water into water bodies.

The primary purpose of a groundwater recharge project in agriculture is to replenish groundwater aquifers, which are essential sources of water for irrigation and other agricultural purposes.

Using drought-resistant crops can reduce water usage, increase crop yields, and reduce the risk of crop failure, but it does not directly improve soil fertility.