Поиск

Полнотекстовый поиск:
Где искать:
везде
только в названии
только в тексте
Выводить:
описание
слова в тексте
только заголовок

Рекомендуем ознакомиться

Остальные работы->Реферат
For Huck, it is the violence and tyranny of his drunken father. Kept in a veritable prison, Huck wishes desperately to escape. Jim feels the need to e...полностью>>
Остальные работы->Реферат
“A contract whereby the insurer undertakes to indemnify the assured, in manner and to the extent thereby agreed, against marine losses, that is to say...полностью>>
Остальные работы->Реферат
The last thing a fourteen-year-old boy expects to find along an Ozark river bottom is a tree full of monkeys. Jay Berry’s grandpa had an explanation, ...полностью>>
Остальные работы->Реферат
The term imagery has various applications. Generally, imagery includes all kinds of sense perception (not just visual pictures). In a more limited app...полностью>>

Главная > Реферат >Остальные работы

Сохрани ссылку в одной из сетей:

Fertilizer Essay, Research Paper

Fertilizer is a substance added to soil to help plants grow. Fertilizer is divided into two groups: natural and synthetic. Fertilizer provides one or more of the chemical elements essential for plant nutrition.

Natural fertilizers are items like animal excrement, straw, other plant materials, guano, animal tankage and meat and bone meals, and bone meals and flours. All natural fertilizers are from nature.

Synthetic fertilizers come in either liquid or solid. They are usually classified into 10 groups: nitrogen fertilizers (it can make the soil acid), ammonia (a kind of fertilizer that contains 82% nitrogen), ammonium nitrate (is made by oxidizing ammonia), ammonium sulfate and ammonium chloride (mostly made from synthetic ammonia), urea (a fertilizer that is 45% to 46% nitrogen and made by combining ammonia with carbon dioxide), others (fertilizers that are only important in few places for special crops), phosphate fertilizers (made from deposits of rock phosphates), superphosphates (made by reacting rock phosphate with sulfuric acid), basic slag (or Thomas slag, a by-product of steelmaking) , and potassium fertilizers (fertilizers that are water soluble). Synthetic fertilizers are also called chemical fertilizers. They have three groups of elements involved in making them. The primary elements include nitrogen, phosphorus, and potassium. These elements are required in the biggest amount. The secondary elements are sulfur, calcium, and magnesium. These elements are required in smaller amounts. The other elements are boron, cobalt, copper, iron, manganese, molybdenum, and zinc. These elements are only required in trace amounts.


Загрузить файл

Похожие страницы:

  1. In Vitro Fertilization Essay Research Paper In

    Реферат >> Остальные работы
    In Vitro Fertilization Essay, Research Paper In Vitro Fertilization ?The unexamined life is not worth living.? ... Each egg is then mixed with semen to achieve fertilization. Assuming there is ... semen, the success rate of fertilization is usually at least 75%. ...
  2. Water Resources Essay Research Paper Water is

    Реферат >> Остальные работы
    Water Resources Essay, Research Paper Water is singly the most important element ... into our water and the excess of fertilizers by commercial and private ... phosphorus (the main components of fertilizer and human waste when broken ...
  3. Soil And Fertilization Essay Research Paper Soil

    Реферат >> Остальные работы
    Soil And Fertilization Essay, Research Paper Soil and Fertilization Soil is the superficial covering of ... vary in appearance, fertility, and chemical characteristics. Color is also a distinguishing ... humus and are generally more fertile than lighter types of ...
  4. Mesopotamia Essay Research Paper Mesopotamia is an

    Реферат >> Остальные работы
    Mesopotamia Essay, Research Paper Mesopotamia is an ancient civilization ... Although the land was fertile, irrigation was essential. ... blessed Mesopotamia with a fertile area of land, which ... Mesopotamia was blessed with fertile soil, irrigation was essential ...
  5. Hinduism Essay Research Paper Hinduism is the

    Реферат >> Остальные работы
    Hinduism Essay, Research Paper Hinduism is the religion followed by the ... -bodied mother-goddess that promoted fertility and procreation or a freightening deity ... ideal of women and of fertility is almostly directly to the beiliefs ...

Хочу больше похожих работ...

Generated in 0.0027627944946289