UREA
Urea (46-0-0) accounts for more than fifty percent of the world's nitrogenous fertilizers. [1] It is found in
granular or prill form, which allows urea to be easily stored, transported and applied in agricultural settings.
It is also the cheapest form of granular nitrogen fertilizer. Since urea is not an oxidizer at standard
temperature and pressure, it is safer to handle and less of a security risk than other common nitrogen
fertilizers, such as ammonium nitrate. However, if urea is applied to the soil surface, a meaningful fraction
of applied fertilizer nitrogen may be lost to the atmosphere as ammonia gas; this only occurs under certain
conditions.
Ammonium Nitrate
Ammonium nitrate is an important fertilizer with NPK rating 34-0-0 (34% nitrogen). [15] It is less concentrated
than urea (46-0-0), giving ammonium nitrate a slight transportation disadvantage. Ammonium nitrate's
advantage over urea is that it is more stable and does not rapidly lose nitrogen to the atmosphere.
Calcium Ammonium Nitrate
Fertilizer grade CAN contains roughly 8% calcium and 21-27% nitrogen. [6] CAN is preferred for use on acid
soils, [5] as it acidifies soil less than many common nitrogen fertilizers. [6] It is also used in place of ammonium
nitrate where ammonium nitrate is banned.
Ammonium Sulfate
The primary use of ammonium sulfate is as a fertilizer for alkaline soils. In the soil the ammonium ion is
released and forms a small amount of acid, lowering the pH balance of the soil, while contributing
essential nitrogen for plant growth. The main disadvantage to the use of ammonium sulfate is its low
nitrogen content relative to ammonium nitrate, which elevates transportation costs. [2]
It is also used as an agricultural spray adjuvant for water-soluble insecticides, herbicides, and fungicides.
There, it functions to bind iron and calcium cations that are present in both well water and plant cells.
Ammonium Sulfate %21 Granular
The primary use of ammonium sulfate is as a fertilizer for alkaline soils. In the soil the ammonium ion is
released and forms a small amount of acid, lowering the pH balance of the soil, while contributing
essential nitrogen for plant growth. The main disadvantage to the use of ammonium sulfate is its low
nitrogen content relative to ammonium nitrate, which elevates transportation costs. [2]
It is also used as an agricultural spray adjuvant for water-soluble insecticides, herbicides, and fungicides.
There, it functions to bind iron and calcium cations that are present in both well water and plant cells.
20-20-0 Compound
Can be used for all corps especially for grains before planting.
20-20-0 + Zn Compound
Can be used for all corps especially for soils with zinc deficiency before planting.
15-15-15 Compound
15-15-15 has equal amount of Nitrogen, Phosphorus and Potassium. It supplies the plant ideal nutrients at an early stage. Usually it is preferred for orange, banana, some ornamental plants, tomato, tobacco, onion and some other vegetables.
15-15-15 + Zn Compound
15.15.15 + Zn is used for soils that need potassium and has zinc deficiency
19-32-0 Compound
19.32.0 is an Economic alternative for 20.20 and DAP for wheat and corn.
19-40-0 Compound
19.40.0 is an economic alternative for DAP 18.46
DAP 18-46-0
DAP is used as a fertilizer. [4] When applied as plant food, it temporarily increases the soil pH, but over a
long term the treated ground becomes more acidic than before upon nitrification of the ammonium. It is
incompatible with alkaline chemicals because its ammonium ion is more likely to convert to ammonia in a
high-pH environment. The average pH in solution is 7.5–8. [5] The typical formulation is 18-46-0
Potassium Sulfate Granular
Potassium sulfate does not contain chloride, which can be harmful to some crops. Potassium sulfate is
preferred for these crops, which include tobacco and some fruits and vegetables. Crops that are less
sensitive may still require potassium sulfate for optimal growth if the soil accumulates chloride from
irrigation water. Granular form makes it easy to use for farmers.
Potassium Nitrate 13-0-46
Potassium nitrate is used in fertilizers as a source of nitrogen and potassium – two of
the macronutrients for plants. When used by itself, it has an NPK rating of 13-0-44