What is the difference between NPK and urea?

Asked By: Yunhua Janesch | Last Updated: 22nd February, 2020
Category: healthy living nutrition
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There is no side effect, in fact it improves the physical condition of soil. Urea is an inexpensive form of nitrogen fertilizer with an NPK (nitrogen-phosphorus-potassium) ratio of 46-0-0. Although urea is naturally produced in humans and animals, synthetic urea is manufactured with anhydrous ammonia.

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Also, what is meaning of NPK?

NPK stands for "nitrogen, phosphorus, and potassium," the three nutrients that compose complete fertilizers. You may encounter these letters when reading the contents printed on bags of fertilizer.

Secondly, what is the use of urea fertilizer? The main function of Urea fertilizer is to provide the plants with nitrogen to promote green leafy growth and make the plants look lush. Urea also aids the photosynthesis process of plants. Since urea fertilizer can provide only nitrogen and not phosphorus or potassium, it's primarily used for bloom growth.

Herein, what form of nitrogen is urea?

Ammonical form of nitrogen is however, easily covertible into nitrate form. Most of the fertilizers contain nitrogen in these two available forms. Urea, however, contains nitrogen in amide form but this form of nitrogen is swiftly converted by soil micro-organisms into ammonical form and then into nitrate form.

How does urea affect plant growth?

Impurities and Improper Use of Urea Fertilizers Can Damage Plants. As with any source of nitrogen, urea itself can damage plants: nitrogen impairs or completely impedes seed germination, and too much nitrogen can give crops a “burn.”

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What is difference between DAP and NPK?

The key difference between DAP and NPK fertilizer is that the DAP fertilizer has no potassium whereas the NPK fertilizer contains potassium as well. The term DAP refers to diammonium phosphate, and it is a phosphate fertilizer; the world's most common phosphorus fertilizer.

Why is NPK important?

The NPK value indicates how much nitrogen, phosphorus and potassium there is in your substrate or fertiliser. These three essential macronutrients are needed by all plants. Knowing the NPK value of your soil and fertiliser helps you give the right amount of nutrients to your plants.

Why do we need fertilizers?

Farmers turn to fertilizers because these substances contain plant nutrients such as nitrogen, phosphorus, and potassium. Fertilizers are simply plant nutrients applied to agricultural fields to supplement required elements found naturally in the soil. Fertilizers have been used since the start of agriculture.

How is NPK calculated?


To calculate the pounds of nitrogen in a bag of fertilizer, multiply the weight of the bag by the percent nitrogen (this is the first number in the N-P-K designation on the front of the bag). This will tell you the pounds of nitrogen in the bag.

What happens when urea is applied to soil?

Urea breakdown begins as soon as it's applied to the soil. If the soil is totally dry, no reaction happens. But with the enzyme urease, plus any small amount of soil moisture, urea normally hydrolyzes and converts to ammonium and carbon dioxide. Losses might be quite low in the spring if the soil temperature is cold.

Can urea burn plants?

Impurities and Improper Use of Urea Fertilizers Can Damage Plants. As with any source of nitrogen, urea itself can damage plants: nitrogen impairs or completely impedes seed germination, and too much nitrogen can give crops a “burn.”

How fast does urea volatilize?

If you till in the urea within three to four days, or irrigate it into the soil within that time frame, or have rainfall within that time frame, or it is cool (less than 70° F sustained), urea losses will be insignificant. Urea is lost for the following reason. It reacts with water to form ammonium carbonate.

Does urea fertilizer expire?

The general answer is no, fertilizer does not go bad if it is properly stored. Liquid fertilizers can have a shelf life between 8-10 years if stored properly (refer to expiration date on product label or contact the manufacturer for more details since all products vary).

Is urea an organic fertilizer?


Urea is naturally produced by a lot of animals as a metabolic byproduct and such natural urea is an approved Organic fertiliser. This is the urea farmers can buy as 'fertiliser '. Synthetic urea is considered by governments, by farmers, and politically, as a synthetic chemical fertilizer.

How do you apply urea fertilizer?

Spread your urea-based fertilizer evenly across your crops.
Apply your fertilizer mixture as you would apply urea on its own, spreading it evenly across the soil. Then water and till the soil in order to incorporate the fertilizer. Urea is less dense than other fertilizers.

How much nitrogen does urea contain?

Urea is a common source of nitrogen in all solid nitrogenous fertilizers and it is widely used as a nitrogen release fertilizer. The standard crop-nutrient rating (NPK rating) of urea is 46-0-0. Hence, it contains 46 % elemental nitrogen (N) 0 % elemental phosphorous (P), and 0 % elemental potassium (K).

How does urea work on skin?

Urea, also known as carbamide-containing cream, is used as a medication and applied to the skin to treat dryness and itching such as may occur in psoriasis, dermatitis, or ichthyosis. It may also be used to soften nails. It may occasionally cause skin irritation. Urea works in part by loosening dried skin.

Can you mix urea with water?

Add the planned volume of water to the spray bottle or tank to create a solution containing no more than 2 percent urea. Gently shake or agitate the bottle or tank to dissolve the urea solid. Urea is highly water soluble and will easily dissolve in the water at this low rate.

What are the disadvantages of urea?


Some major disadvantages of excessive/indiscriminate use of urea are listed as under: It enhances mining of soil nutrients that are not applied or applied inadequately, thus leading to deterioration of soil fertility. Such soils may require more fertilizers over time to produce optimum yields.

Is urine good for plants?

Recent scientific studies have shown urine is a safe and very effective fertilizer for cabbage, beets, cucumbers, and tomatoes, and pretty much anything else you want to grow. Urine boasts a nitrogen-phosphorus-potassium (N-P-K) ratio of 10:1:4, plus more modest amounts of the trace elements plants need to thrive.