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Seaweed fertilizer can be used as a crude addition to soil as mulch, ... Generally the N:P ratio for seaweeds is 30:1, however, the ratio can differ significantly ...
Fertilizers are usually labeled with three numbers, as in 18-20-10, indicating the relative content of the primary macronutrients nitrogen (N), phosphorus (P), and potassium (K), respectively. More precisely, the first number ("N value") is the percentage of elemental nitrogen by weight in the fertilizer; that is, the mass fraction of nitrogen ...
Redfield discovered the remarkable congruence between the chemistry of the deep ocean and the chemistry of living things such as phytoplankton in the surface ocean. Both have N:P ratios of about 16:1 in terms of atoms. When nutrients are not limiting, the molar elemental ratio C:N:P in most phytoplankton is 106:16:1. Redfield thought it wasn't ...
Major two-component fertilizers provide both nitrogen and phosphorus to the plants. These are called NP fertilizers. The main NP fertilizers are monoammonium phosphate (MAP) NH 4 H 2 PO 4. With 11% nitrogen and 48% P 2 O 5. diammonium phosphate (DAP). (NH 4) 2 HPO 4. With 18% nitrogen and 46% P 2 O 5; About 85% of MAP and DAP fertilizers are ...
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[citation needed] Seaweed-fertilizer also helps in breaking down clays. [citation needed] Fucus is used by Irish people as a biofertilizer on a large scale. [citation needed] In tropical countries, the bottom mud from dried-up ponds which contain abundant blue-green algae is regularly used as biofertilizer in fields. [citation needed]
Seaweed, such as kelp, also absorbs phosphorus and nitrogen [104] and is thus helpful to remove excessive nutrients from polluted parts of the sea. [105] Some cultivated seaweeds have very high productivity and could absorb large quantities of N, P, CO 2 , producing large amounts of O 2 having an excellent effect on decreasing eutrophication ...
Other seaweed may be used as fertilizer, compost for landscaping, or to combat beach erosion through burial in beach dunes. [55] Seaweed is under consideration as a potential source of bioethanol. [56] [57] Seaweed is lifted out of the top of an algae scrubber/cultivator, to be discarded or used as food, fertilizer, or skin care.