The three main nutrients that urea fertilizer provides are nitrogen (N), phosphorus (P), and potassium (K). Nitrogen is important for plant growth. Phosphorus helps roots and flowers grow better. Potassium makes plants more resistant to things like high temperatures and pest attacks.
Urea is the most important nitrogenous fertilizer on the market and has the highest nitrogen content (about 46 percent). It is an organic chemical compound that is crystalline and white. Urea has a pH of 7 and can grow in almost any type of soil.
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It is a waste product that is made when people, other mammals, amphibians, and some fish break down protein. Urea is used a lot in agriculture, both as a fertilizer and as an ingredient in animal feed.
The main job of Urea fertilizer is to give the plants nitrogen, which makes the plants grow green leaves and look full. Urea also helps plants make food from sunlight. Since urea fertilizer can only add nitrogen and not phosphorus or potassium, it is mostly used to make plants grow flowers.
What’s good about urea fertilizer
- Superior Nitrogen content
- Source is natural, so costs are low.
- Non-flammable and risk-free storage
- Wide range of uses, for all kinds of plants and soils
- pH neutral and safe for plants and soil
How Should Urea Fertilizer Be Used?
- Urea should be put on the ground when the seeds are planted. It shouldn’t touch the seeds in any way. It can also be used on top of food.
- Since Urea has a lot of nitrogen in it, it should be mixed with earth or sand before it is used.
- Urea shouldn’t be put on soil that is already wet or that is likely to stay wet for three or four days after it has been put on.
How to Mix Urea and Other Fertilizers
Mono-ammonium Phosphate (MAP) or Di-ammonium Phosphate (DAP) is easy to mix with urea (DAP). But you can’t mix Urea with superphosphate unless you use the mixture right away, because Urea reacts with superphosphate to make water molecules. This will make a material that is hard to store and use because it is wet.
Tips When Applying Urea Fertilizers For Optimum Results
1. Minimize ammonia loss by applying urea on a cool day
Urea is best used on a cool day when the temperature is between 32° and 60° F (0°-15.6° C) and there is little or no wind. When it’s cold, the ground freezes, which makes it hard to mix urea into the soil. When there is more wind and the temperature is higher, the urea breaks down faster than it can soak into the soil.
2. Use a urea fertilizer with a urease inhibitor before planting
Urease is the enzyme that initiates the chemical reaction that converts urea into the nitrates required by plants. If you put down urea fertilizer before you plant, a lot of the urea will be lost before it can help your plants. Using a fertilizer with a urease inhibitor can slow down the chemical reaction and help keep the urea in the soil.
3. Spread the urea evenly across the soil
Small, solid pellets or granules are what are used to package and sell urea. Spread the urea over your soil evenly with a fertilizer spreader or by hand with pellets. For most plants, you will want to keep the urea close to the roots or close to where you will plant the seeds.
4. Wet the soil
Ammonia gas is made from urea before it can be turned into the nitrates your plants need. Since gases can easily escape from the surface of the soil, applying fertilizer when the ground is wet will help mix the urea into the soil before the chemical reaction starts. This helps keep more of the ammonia in the soil.
To keep as much ammonia gas in the soil as possible, the top half inch (1.3 cm) should be wet. You can water the soil yourself, put down the urea before it rains, or do either of those things within 48 hours after all the snow on your fields has melted.
5. Till the soil to incorporate the urea
Tilling your fields or garden is a great way to incorporate the urea fertilizer into the soil before any of the ammonia gas can be lost. Harrow, drag, or hoe the field in order to incorporate the urea into the top layer of the soil.
5. Control the amount of nitrogen you give to potato plants
Some kinds of potatoes can handle a lot of nitrogen, but other kinds can’t. Be careful, and treat each potato the same. Don’t use urea fertilizer to give your potato plants a lot of nitrogen. You can put urea fertilizers directly on potato plants or mix them with other fertilizers in a solution as long as the solution has no more than 30% nitrogen. Fertilizer solutions with more than 30% nitrogen shouldn’t be put on fields after potatoes have been planted.
6. Fertilize grains with urea on a mild day
Most cereal grains can be sprayed directly with urea, but never when the temperature is above 60° F (15.6° C). When it is used when it is warmer, the plants will smell like ammonia.
7. Apply urea to corn seeds indirectly.
Spreading urea on the soil at least 2 inches (5 cm) away from the corn seeds is the only way to use urea on corn. When urea comes into direct contact with corn seeds, it kills them and makes the corn plant produce much less.
1. Mixing Urea with Other Fertilizers
Fertilizer ratios, also called N-P-K numbers, are a set of three numbers that tell you how much of a mixture of fertilizers, by weight, is made up of fertilizers that are high in nitrogen, phosphorus, and potassium.
If you have a sample of your soil tested, you will be given the right amount of fertilizer to use to make up for the nutrients that your soil doesn’t have enough of. Most people who garden as a hobby can find fertilizers that are already mixed and ready to use at a plant nursery or garden supply store.
2. Combine urea with additional fertilizers to create a stable fertilizer mixture.
Urea provides plants with nitrogen, but other elements, like phosphorus and potassium, are important for plant health as well. Fertilizers that you can safely mix and store with urea include:
- Calcium cyanamide
- Sulphate of potash
- Sulphate of potash magnesium
3. Mix urea with certain fertilizers to fertilize plants immediately.
There are certain fertilizers that can be mixed with urea, but lose their effectiveness after 2-3 days because of the reactions that occur between the fertilizer’s chemicals. These include:
- Chilean nitrate
- Sulphate of ammonia
- Nitrogen magneseia
- Diamonnium phosphate
- Basic slag
- Rock phosphate
- Muriate of potash
4. Prevent unwanted chemical reactions from harming your crops
Some fertilizers will react with urea to either create a volatile chemical reaction or render the fertilizer mixture completely useless. Never combine urea with the following fertilizers: Calcium nitrateCalium ammonium nitrateLimestone ammonium nitrate Ammonium sulphate nitrateNitropotashPotash ammonium nitrateSuperphosphateTriple superphosphate.
5. Blend urea with phosphorus and potassium-rich fertilizers for a well-balanced fertilizer
Choose sources of phosphorus and potassium for your fertilizer mix by looking at the list of fertilizers that work well with urea and those that don’t. Many of these can be bought at nurseries and stores that sell things for gardens.
Add the weights of each of the fertilizers you’ve chosen, which are given by your fertilizer ratio. Blend them together well. This can be done in a big bucket, a wheelbarrow, or with machines that mix things together.
6. Spread your urea-based fertilizer evenly across your crops
Spread your fertilizer mixture over the soil the same way you would spread urea on its own. Then water the soil and turn it over to incorporate the fertilizer. Other fertilizers are more dense than urea. If you use spinning equipment to spread urea-based fertilizer over a large area on your farm, keep the spread width under 50 feet (15.2 m) to make sure the mixture is spread evenly.