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Two very similar expressions for δ 15 N are in wide use in hydrology. [2] Both have the form 1000 ⋅ s − a a {\displaystyle 1000\cdot {\frac {s-a}{a}}} ‰ (‰ = permil or parts per thousand) where s and a are the relative abundances of 15 N in respectively the sample and the atmosphere.
IBDU is a single compound with the formula (CH 3) 2 CHCH(NHC(O)NH 2) 2 whereas the urea-formaldehydes consist of mixtures of the approximate formula (HOCH 2 NHC(O)NH) n CH 2. Controlled release fertilizers are traditional fertilizers encapsulated in a shell that degrades at a specified rate. Sulfur is a typical encapsulation material.
The regulations stipulate that this should be done in parentheses after the standard N-P-K values, as in "15-30-15 (15-13-13)". [4] In Australia, macronutrient fertilizers are labeled with an "N-P-K-S" system, which uses elemental mass fractions rather than the standard N-P-K values and includes the amount of sulfur (S) contained in the fertilizer.
Abu Qir Fertilizers and Chemical Industries Co SAE (ABUK.CA) [3] is a former state-owned company that is one of the largest producers of nitrogen fertilizers in Egypt and the Middle East. [4] It produces about 50% of the Egyptian nitrogen fertilizers. [5] It owns three plants that produce liquid fertiliser, ammonia, urea, and ammonium nitrate. [2]
Through a series of expansion programmes, FACT soon became the producer of a wide range of fertilizers for all crops and all soil types in India. It became a Kerala State public sector enterprise in 1960 and in 1962, it came under the Government of India. The consultancy unit known as FACT Engineering and Design Organisation (FEDO) was set up ...
The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers. The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N) known as UN32 or UN-32, which consists of 45% ammonium nitrate , 35% urea and only 20% water.
The OCP Group (OCP S.A.) (formerly Office Chérifien des Phosphates) is a Moroccan state-owned phosphate rock miner, phosphoric acid manufacturer and fertilizer producer. [2] [3] Founded in 1920, the company has grown to become the world's largest producer of phosphate and phosphate-based products and it is one of the largest phosphate, fertilizer, chemicals, and mineral industrial companies ...
Sprayers range in size from man-portable units (typically backpacks with spray guns) to trailed sprayers that are connected to a tractor, to self-propelled units similar to tractors with boom mounts of 4–30 feet (1.2–9.1 m) up to 60–151 feet (18–46 m) in length depending on engineering design for tractor and land size.