3 - The Nutrient Solution (1) (3).pdf

3 - The Nutrient Solution (1) (3).pdf - INORGANIC SALTS...

Info icon This preview shows pages 1–3. Sign up to view the full content.

THE NUTRIENT SOLUTION INORGANIC SALTS Inorganic - not organic; of mineral origin Salt - any of a class of compounds formed by the replacement of one or more hydrogen atoms of an acid with elements or groups, which are composed of anions and cations , and which usually ionize in solution; a product formed by the neutralization of an acid by a base. DISSOCIATION When a salt is dissolved in water it will dissociate into separate ions. WHAT SALTS DO WE USE? In hydroponics, all nutrients are supplied by dissolving salts into water. Picking the right salt(s) depends on a number of factors. 1. The Proportion of Ions the Salt Provides Example: We need to supply N to the plant. We have multiple options available to us that will do that. Two examples are KNO 3 (potassium nitrate) and Ca(NO 3 ) 2 (calcium nitrate) All other factors being equal , which salt would provide more N per unit? Answer: Calcium nitrate: Ca(NO 3 ) 2 When calcium nitrate dissociates in water it will provide two nitrate (NO 3 - ) anions for every one Ca (Ca 2+ ) cation . When potassium nitrate KNO 3 dissociates in water it will only provide one nitrate (NO 3 - ) anion per one K (K + ) cation. So.. Ca(NO 3 ) 2 would be preferable to KNO 3 especially for crops that need a lower EC (electrical conductivity). More on this later
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

2. Solubility Solubility is the measure of the concentration of the salt that will remain in solution when dissolved in water. If a salt has a low solubility only small amounts will dissolve in water. We must use salts that have high solubility so they will remain in solution during the production cycle.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '08
  • Brown,J
  • Solubility, Ion, calcium nitrate

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern