Problem: Article: Urea is best applied on a cool day, in weather between 32° to 60° F (0°-15.6° C), and with little to no wind.  At colder temperatures, the ground is frozen, making it difficult to incorporate the urea into the soil.  At higher temperatures, and in windy conditions, the urea is broken down faster than it can soak into the soil. Urease is the enzyme that begins the chemical reaction that turns urea into the nitrates plants need. Applying urea fertilizers before planting leads to high amounts of the urea being lost before it can benefit your plants. Using a fertilizer with a urease inhibitor can slow the chemical reaction, and helps retain urea in the soil. Urea is packaged and sold as small, solid pellets or granules. Broadcast the urea with a fertilizer spreader or sprinkle the pellets by hand evenly across your soil. For most plants, you will want to keep the urea close to the plant's roots, or close to where you will plant the seeds. Before urea is turned into the nitrates your plants need, it first becomes ammonia gas. Because gases can easily escape from the surface of the soil, applying fertilizer when the ground is wet will help to incorporate the urea into the soil before the chemical reaction begins. This way, more of the ammonia is trapped within the soil. The top half inch (1.3 cm) of soil should be wet to keep as much ammonia gas in the soil as possible.  You can water the soil yourself, apply the urea before it rains, or apply within 48 hours after the snow on your fields has completely melted. 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. Certain varieties of potatoes can handle high levels of nitrogen, while others cannot. Be cautious and treat all potatoes the same way. Avoid giving potato plants large quantities of nitrogen with your urea fertilizer.  Urea fertilizers can be applied directly onto potato plants, or in a solution with other fertilizers, as long as the solution is made up of 30% nitrogen or less. Solutions of urea fertilizer that are more than 30% nitrogen should only be applied to fields before potatoes are planted. Urea can be applied directly onto most cereal grains, but never in temperatures above 60° F (15.6° C). When applied in warmer temperatures, the plants will give off an odor of ammonia. Only apply urea to corn indirectly, by spreading the urea onto soil at least 2 inches (5 cm) away from the corn seeds. Direct exposure to urea is toxic to the seeds, and greatly reduces the corn plant's yield.
Summary: Minimize ammonia loss by applying urea on a cool day. Use a urea fertilizer with a urease inhibitor before planting. Spread the urea evenly across the soil. Wet the soil. Till the soil to incorporate the urea. Control the amount of nitrogen you give to potato plants. Fertilize grains with urea on a mild day. Apply urea to corn seeds indirectly.

In one sentence, describe what the following article is about: Trimming straight across creates a pleasing effect, but it can also limit ingrown toenails. However, you can round off the corners with a file so you don't scratch yourself with your toenails.  Trim your nails when they're dry. You'll get a cleaner cut.  Pick out clippers meant for toenails, as they are less rounded and made to cut thicker nails. You may find that nail nippers work even better, especially if you have nail fungus, because they are sharper and easier to control. They look like small wire cutters.  Skip cutting cuticles. They help protect you from infection. Your toenails should be about as long as your toes. If they're any longer, they may rub against your shoes. If they're too short, it can lead to infection. An ingrown toenail happens when the edge of your toenail pushes into your skin. You may notice your toe is red, some swelling, or some pain.  To deal with an ingrown toenail yourself, bathe your feet in warm water for about 20 minutes, which can help relieve pain and swelling; acetaminophen and ibuprofen can also help with the pain. Place cotton or dental floss under the edge, to help the nail grow properly; put new pieces back in after each time you soak it. To keep it from getting infected, use antibiotic ointment and then cover the area with a bandage. It can also help if your shoes are loose-fitting or open around the toes. Proper toenail maintenance can help keep you from getting ingrown toenails, such as cutting straight across and keeping toenails at the proper length.  You can deal with ingrown toenails yourself. However, you may need to see your doctor about one if you are having a great deal of pain. Also, redness moving up your toe or pus coming from the wound could be a sign of a more serious infection. Also, if you have diabetes, it's important to take action when you notice any problems with your feet. Run a manicure stick under your nails. Don't push too hard, as you can separate the nail from the nail bed. Running a manicure stick will help keep them clean and beautiful. While it's fine to use polish, you also need to take a break from it every once and awhile. Keep away from it about a fourth of the time, taking a week off a month. That will give your toes a breather and allow them to regain moisture. If you leave it on for longer, you can stain your toenails. However, adding a clear base coat before painting your toenails can help alleviate this problem. If you do have stained nails, check to see if they're also hard and brittle. If so, you likely have a toenail fungus. Ask your doctor about the condition.
Summary:
Trim toenails straight across. Cut toenails to the proper length. Watch for ingrown toenails. Clean under your toenails. Take a break from polish occasionally. Remove nail polish before 2 weeks is up.