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A maize crop yielding 6–9 tonnes of grain per hectare (2.5 acres) requires 31–50 kilograms (68–110 lb) of phosphate fertilizer to be applied; soybean crops require about half, 20–25 kg per hectare. [21] Yara International is the world's largest producer of nitrogen-based fertilizers. [22]
The structure of the molecule of urea is O=C(−NH 2) 2.The urea molecule is planar when in a solid crystal because of sp 2 hybridization of the N orbitals. [8] [9] It is non-planar with C 2 symmetry when in the gas phase [10] or in aqueous solution, [9] with C–N–H and H–N–H bond angles that are intermediate between the trigonal planar angle of 120° and the tetrahedral angle of 109.5°.
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.
Specifically, highly alkaline soils (pH~8.2 or higher) have proven to increase urea hydrolysis. One study has shown complete hydrolysis of urea within two days of application on such soils. In acidic soils (pH 5.2) the urea took twice as long to hydrolyze. [7] Surface residues, such as thatch and plant stubble exhibit increased urease activity.
The reports follow calls from China's nitrogen fertiliser association last month to prioritise supplies for domestic use after prices hit a two-year high. The issue has raised concern about a ...
The plant had a production capacity of 570,000 tons per annum (TPA) and an initial construction cost of US$303 million. [13] The plant was supplied by Haldor Topsoe and was commissioned in 1982 after an additional investment of US$15 million. [13] As of 2024, FFC-I has a capacity to produce 403,000 TPA of ammonia and 695,000 TPA of urea. [14]
(Reuters) -U.S. lender JPMorgan Chase agreed on Friday to drop its lawsuit against Tesla that accused the electric vehicle maker of "flagrantly" breaching a contract between the two companies in ...
Ureases are found in numerous bacteria, fungi, algae, plants, and some invertebrates, as well as in soils, as a soil enzyme. They are nickel-containing metalloenzymes of high molecular weight. [3] These enzymes catalyze the hydrolysis of urea into carbon dioxide and ammonia: (NH 2) 2 CO + H 2 O CO 2 + 2NH 3. The hydrolysis of urea occurs in two ...
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