Essays about: "mineral additions"

Showing result 1 - 5 of 7 essays containing the words mineral additions.

  1. 1. Recirkulering av restprodukter och gynnande av arbuskulär mykorrhiza : två möjliga faktorer i strävan mot ett hållbart fosfornyttjande?

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Karl-Johan Fabo; [2018]
    Keywords : mykorrhiza; arbuskulär mykorrhiza; fosfor; fosforbrist; växtnäring; kretsloppsprodukter; restprodukter; tungmetaller; organiska föroreningar;

    Abstract : Låg förekomst av växttillgänglig fosfor är en begränsande faktor för grödors tillväxt på många odlingsmarker. Under det senaste århundrandet har odlare i allt högre utsträckning kommit att använda mineralgödsel för att kunna erhålla tillräckligt stora skördar. READ MORE

  3. 2. Mineral Constraints on the Source Lithologies at Fogo, Cape Verde.

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Elin Rydeblad; [2018]
    Keywords : olivine; clinopyroxene; carbonatite; Cape Verde; Eclogite; source lithologies;

    Abstract : Variations in major, minor, and trace elements compositions and ratios, as well as isotope ratios are all useful tools in studying the composition of the Earth’s mantle, and heterogeneities present therein. Since the mantle itself doesn’t easily lend itself to study, ocean island basalt (OIBs) are commonly used as a proxy due to compositional differences combined with the range of origination depth, a combination that allows them to represent the heterogeneity of the mantle, sampling everything from the core mantle boundary to the old or recent additions of recycled oceanic crust. READ MORE

  4. 3. Mineraler till svenska får : vilka är behoven och hur kan de tillgodoses?

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Hanna Jibbefors; [2017]
    Keywords : enkät; kalcium; fosfor; magnesium; kalium; svavel; natrium; klor; jod; järn; mangan; kobolt; koppar; selen; zink; molybden; krom; bor; fluor; bolus; administrering;

    Abstract : En effektiv och lönsam lammproduktion kräver en balanserad foderstat som täcker djurens behov av essentiella mineralämnen. Dagens utfodringsrekommendationer anses som svårtolkade och en sammanställning saknas. READ MORE

  5. 4. Temperature reduction during concrete hydration in massive structures

    University essay from KTH/Betongbyggnad

    Author : Sandra Lagundzija; Marie Thiam; [2017]
    Keywords : Massive concrete structures; hydration heat; temperature reduction; crack risk; mineral additions; concrete cooling; Massiva betongkonstruktioner; värmeutveckling; temperaturreducering; sprickbildning; mineraltillsatser; kylning av betong;

    Abstract : Concrete is one of the most used building materials in the world because of its good properties. However, cement which is one of the main components in concrete, produces a high amount of heat during the hydration process. The generated heat leads to temperature rise inside the structure. READ MORE

  6. 5. Potential to inactivate microorganisms in sewage sludge by ammonia treatment : different temperatures and urea additions

    University essay from SLU/Dept. of Energy and Technology

    Author : Fredrik Wirell; [2015]
    Keywords : Ammonia; Urea; Sewage sludge; inactivation; reduction; Thermo tolerant coliform bacteria; Salmonella; E. coli; Enterococci; Somatic coliphage;

    Abstract : Sewage sludge is rich in nutrients and organic matter, both of which can be useful in the agricultural system. By recycling the nutrients from our excreta, a more sustainable use of nutrients in agriculture can be achieved and the use of mineral fertilizer can thereby be decreased. READ MORE