Weed Management and Pesticides
When you think of water, what comes to mind? Is it a cool swig after a hard workout? Is it your beach vacation from last year? Or is it whether or not enough water will fall from the sky to grow your food?
March 22 is World Water Day, and it’s an opportunity to reflect on the importance of water. This year’s theme is “better water, better jobs.” How does water impact agriculture, which employs nearly 1 billion people around the world? Let’s take a look.
Although nearly 70 percent of the Earth is covered in water, only 2.5 percent of that water is fresh. To complicate things, only 1 percent of that fresh water is easily accessible. To sum it up, only 0.025 percent of the planet’s water is available for human use.
Agriculture uses a lot of water, accounting for almost 70 percent of all withdrawals and up to 95 percent in developing countries where there may be fewer technologies to make water use efficient. While you only need to drink about a gallon of water per day, it takes 528 to 1,320 gallons of water to grow the food you eat in a single day. Think about that.
Water is important in maintaining food security, which is defined as “regular access of people to enough high-quality food to leave active, healthy lives.” Lack of water, or too much water, can contribute to famine and undernourishment, especially where people depend on local agriculture for their livelihood. Using water efficiently is critical.
Irrigation is an important technology to help maximize the efficiency of water use in agriculture. The highest yields that can be obtained from irrigation are more than double the best yields from rain-fed agriculture. For instance, drip irrigation involves distributing water at very low rates from a system of plastic pipes with outlets called emitters or drippers. The water is released so that the only part of the soil that receives moisture is where the root grows.
Read the entire article and learn more about agricultural innovation here.