Manure

Animals leave waste behind.

This waste is called manure. It is often mixed with straw. Farmers put it on dirt. It helps plants grow big.

Manure adds good things to the soil. It helps the dirt hold water. This makes the soil very rich. Tiny living things in the soil eat it. This helps the whole food chain. It is a very old way to farm.

Manure is organic matter used to help plants grow.

Most manure comes from animal waste. It can also come from compost. Compost is made from dead plant parts. Another type is green manure. This is when farmers grow crops just to plow them into the dirt.

Different animals make different kinds of manure. Sheep manure has a lot of nitrogen and potash. Chicken manure is very high in nitrogen. It is also high in phosphate. This makes it a great fertilizer.

Cattle manure is also good for soil. It adds nitrogen and organic carbon.

Manure helps the soil in many ways. It helps the dirt hold more water. It also helps the soil hold nutrients. Tiny living things like bacteria eat the manure. This helps the whole food web in the soil. Some people even use dry dung as fuel. In 2018, scientists found a way to make paper from cow and elephant dung.

Manure is a special kind of organic matter used to help plants grow.

It acts as a natural fertilizer for many types of farming. Most manure comes from animal waste, like feces. However, it can also come from compost or green manure. Green manure is when farmers grow specific crops just to plow them into the dirt.

This process adds nutrients back into the soil. It is a way to keep the earth healthy and fertile.

There are many ways that manure works in the soil. It helps the soil structure, which is how the dirt holds together. This helps the ground hold onto more water and nutrients.

Tiny living things like bacteria and fungi eat the organic matter. These small organisms then become part of a soil food web. This web supports even larger living things in the environment. Manure also provides nitrogen to assist with plant growth. Different animals create manure with different qualities for the soil.

People have used animal manure for centuries to help their crops.

Farmers use different methods to spread it on their fields. For example, they might use a machine called a manure spreader. Some farmers use liquid manure, which is known as slurry. This is common in places where animals are kept in intensive systems. In these systems, manure might be mixed with water in large reservoirs. In some areas, farmers even inject liquid manure directly into the soil. This helps to reduce the strong smells that can come from it.

Every animal produces a unique kind of fertilizer. Sheep manure is high in nitrogen and potash.

In contrast, pig manure has relatively low levels of both. Chicken manure is very concentrated in nitrogen and phosphate. Cattle manure is a good source of nitrogen and organic carbon. Horses eat mostly grass, so their manure can contain grass seeds. This happens because horses do not digest seeds the same way cattle do. Even seabirds like guano provide important manure for the earth.

While manure is very useful, it can also bring some challenges. It often has a very strong and unpleasant odor. This smell comes from things like skatole or different acids.

Manure can also carry germs that might make food unsafe. In 2007, a study from the University of Minnesota looked at how antibiotics move through soil. They found that crops like corn and lettuce can absorb antibiotics from manure. Scientists are always looking for new ways to use manure safely. In 2018, researchers in Austria even found a way to make paper from cow and elephant manure.

Manure is a vital form of organic matter used as fertilizer in agriculture.

It provides essential nutrients to the earth to help plants thrive. Most manure consists of animal feces, but other forms exist. These include compost, which is decomposed organic material, and green manure. Green manure involves growing specific crops, such as clover, just to plow them into the soil.

This process incorporates organic matter and nutrients directly into the ground. By doing this, farmers can increase the fertility of their land.

The mechanism of manure relies on a complex soil food web. When manure is added to the earth, it provides organic matter and nutrients like nitrogen. These elements are utilized by tiny organisms such as bacteria and fungi.

These microbes act as the foundation for larger organisms in the soil. This chain of life helps improve soil aggregation, which is the soil structure. Better aggregation allows the soil to hold more water and nutrients. This improved structure makes the land much more fertile for growing crops. Manure also encourages microbial activity, which promotes the supply of trace minerals.

There are three main classes of manure used in modern soil management. The first is animal manure, which is the most common type. This includes farmyard manure, which often contains straw bedding used for animals. It also includes slurry, a liquid form of manure. Slurry is common in intensive livestock systems where animals live on concrete or slats.

The second class is compost, made from decomposed plant remnants or animal dung. The third class is green manure, which uses living plants to fix nitrogen. For example, legumes use Rhizobia bacteria in root nodes to fix nitrogen in the soil.

Different animals produce manure with very different chemical properties. Sheep manure is high in nitrogen and potash, which is a type of mineral. In contrast, pig manure is relatively low in both of those nutrients. Poultry manure, such as chicken litter, is highly prized because it is concentrated in nitrogen and phosphate. Cattle manure provides a good source of both nitrogen and organic carbon. Horse manure is unique because horses do not digest seeds as well as cattle do. Because horses eat mostly grass and weeds, their manure can contain undigested seeds. Even guano from seabirds and bats serves as a potent form of manure.

History shows that humans have used animal manure for centuries to support farming. People have used cow dung and chicken manure to improve their harvests for a very long time. Today, manure is used in many ways, including commercial composting and bagging for sale. In some parts of the world, dry animal dung is even used as a fuel. In 2018, Austrian scientists discovered a new way to use this resource. They found a method to produce paper from the manure of elephants and cows.

Using manure also presents several environmental and health challenges. One major issue is the unpleasant odor caused by compounds like skatole.

In intensive pig farming, slurries can be very smelly due to anaerobic fermentation. To manage this, farmers may use a method called knifing, where they inject manure directly into the soil. There are also risks regarding pathogens, which are organisms that can cause disease. These can be carried by flies or rodents and might affect food safety. Additionally, manure can emit nitrous oxide, a greenhouse gas that contributes to climate change.

Another complex issue involves the presence of antibiotics in the soil. A 2007 study from the University of Minnesota found that crops can accumulate these drugs. Specifically, foods like corn, lettuce, and potatoes were found to contain antibiotics from manure. This happens when livestock are treated with drugs that end up in their waste. Organic farming standards, such as those from the Soil Association, manage this risk. Some organic farmers use their own manure to avoid drug residues. Others ensure that any nonorganic manure is fully composted to degrade residues and eliminate bacteria.