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  2. Plant nutrients in soil - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrients_in_soil

    Nitrogen is the most critical element obtained by plants from the soil, to the exception of moist tropical forests where phosphorus is the limiting soil nutrient, [36] and nitrogen deficiency often limits plant growth. [37] Plants can use nitrogen as either the ammonium cation (NH 4 +) or the anion nitrate (NO 3 −).

  3. Plant nutrition - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrition

    For example, nitrogen compounds comprise 40% to 50% of the dry matter of protoplasm, and it is a constituent of amino acids, the building blocks of proteins. [9] It is also an essential constituent of chlorophyll. [10] In many agricultural settings, nitrogen is the limiting nutrient for rapid growth.

  4. Nutrient management - Wikipedia

    en.wikipedia.org/wiki/Nutrient_management

    Nitrogen fertilizer being applied to growing corn in a contoured, no-tilled field in Iowa.. Nutrient management is the science and practice directed to link soil, crop, weather, and hydrologic factors with cultural, irrigation, and soil and water conservation practices to achieve optimal nutrient use efficiency, crop yields, crop quality, and economic returns, while reducing off-site transport ...

  5. Fertilizer - Wikipedia

    en.wikipedia.org/wiki/Fertilizer

    Through the increasing use of nitrogen fertilizer, which was used at a rate of about 110 million tons (of N) per year in 2012, [131] [132] adding to the already existing amount of reactive nitrogen, nitrous oxide (N 2 O) has become the third most important greenhouse gas after carbon dioxide and methane.

  6. Illinois Soil Nitrogen Test - Wikipedia

    en.wikipedia.org/wiki/Illinois_Soil_Nitrogen_Test

    The ISNT is a new (2007) method for measuring nitrogen available for plant uptake. ISNT estimates the amount of nitrogen present in the soil as amino sugar nitrogen. With respect to corn and soybeans, the optimal range for plant growth appears to be around 225 to 240 mg/Kg. Some form of nitrogen fertilizer is needed if levels are below this ...

  7. Nitrogen and Non-Protein Nitrogen's effects on Agriculture

    en.wikipedia.org/wiki/Nitrogen_and_Non-Protein...

    Nitrogen is a fundamental nutrient in agriculture, playing a crucial role in plant growth and development. It is an essential component of proteins, enzymes, chlorophyll, and nucleic acids, all of which are essential for various metabolic processes within plants. [2]

  8. Maize - Wikipedia

    en.wikipedia.org/wiki/Maize

    Maize / m eɪ z / (Zea mays), also known as corn in North American English, is a tall stout grass that produces cereal grain.It was domesticated by indigenous peoples in southern Mexico about 9,000 years ago from wild teosinte.

  9. Three Sisters (agriculture) - Wikipedia

    en.wikipedia.org/wiki/Three_Sisters_(agriculture)

    "The Three Sisters: Corn, Beans, and Squash: How to Plant a Three Sisters Garden". The Old Farmer's Almanac. Cornelius, Carol (1999). Iroquois Corn in a Culture-Based Curriculum: A Framework for Respectfully Teaching about Cultures. State University of New York Press. ISBN 978-0-7914-4027-8.