REVIEW spray, although not a substitute for healthy

REVIEW OF RELATED LITERATURE

 

Organic Fertilizer

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Organic
fertilizers are derived in natural sources guarantees, at least, the minimum
percentages of nitrogen, phosphate, and potash. It is also a compound that
contains one or more kinds of organic matter. The ingredients may be animal or
vegetable matter or a combination of the two

Foliar
Fertilization

Foliar application
is a process that the liquid fertilizer is directly applied to the leaves of a
plant. It has been known for many years that plants are able to absorb
essential elements through their leaves and work within few hours of
application. The application of special purpose foliar fertilizer to complement
N-P-K values is eight to twenty times more efficient than ground feeding.
Additionally, the fertilizer spray enables the plant to cope the ravages of
environmental stress such as drought temperature, extreme water, logging and
insufficient sunshine and improve resistance to disease and pest infestation.
When fertilizers are foliar applied, more than 90% of the fertilizer is
utilized by the plant.  When a similar
amount is applied to the soil, only 10 percent of it is utilized.

Foliar spray, although not a substitute for healthy
soil, can be beneficial when a plant is suffering from certain nutrient
deficiencies. Foliar plant spray involves applying

 fertilizer directly to a plant’s leaves as
opposed to putting it in the soil. Foliar sprays are generally less
concentrated than fertilizers that are placed on the soil. Many people use
natural materials for foliar sprays such as kelp, compost tea, weed tea, herbal
tea and fish emulsion. Foliar application should be applied in the early
morning before the sun becomes hot. Spray plants until you see the mixture
dripping. Foliar spray fertilizer is an excellent short-term solution for
plants experiencing stress. However, it is always best to build up your soil
with plenty of organic matter.

            Many
plant nutrients are needed in such great quantities that it is impractical to
supply them through the foliage. However, when soil conditions are unfavorable,
when micronutrients are needed, or when spraying for insects and disease, it
may be desirable to make foliar applications of the plant nutrients. When plant
nutrients are applied to the foliage of the plant, smaller quantities of the
fertilizer material are required than when applying to the soil. The danger of
fixation and/or leaching is also reduced when nutrients are applied to the
foliage of the plant.

Seaweeds

Seaweeds offer a
wide range of therapeutic possibilities both internally and externally. The
term Seaweeds in this case refers only to macrophytic marine algae, both wild
and cultivated, growing in saltwater. 
Seaweeds are classified as Green, Brown, or Red. A particular seaweed’s
placement in one of these groups is determined first by its photosynthetic
pigments, then its reproductive mode, then its micro and macro morphologies,
and finally by its phycopolymers. 

 Seaweeds can be used to reduce the nitrogen
and phosphorus content of effluents from sewage treatments. Many seaweeds have
a preference to take up ammonium as the form of nitrogen for their growth and
ammonium is the prevalent form of nitrogen in most domestic and agricultural
wastewater. Another important feature of many seaweeds is their ability to take
up more phosphorus than they require for maximum growth. It would be preferable
to use seaweeds that have some commercial value, but these do not necessarily
have the ability to withstand the conditions encountered in the processing of
the wastewater. There is a need for the seaweed to be able to tolerate a wide
variation in salinity because of the dilution of salinity by the sewage or
wastewater. There are two main areas where seaweeds have the potential for use
in wastewater treatment. The first is the treatment of sewage and some
agricultural wastes to reduce the total nitrogen- and phosphorus-containing
compounds before release of these treated waters into rivers or oceans. The
second is for the removal of toxic metals from industrial wastewater (Schramm
1991b).

Seaweeds are one of the good sources of fertilizers
particularly the “Sargassum cristaefolium” aside from sources of food
(Velasques 1953). Meanwhile, Chase (1942) reported that seaweeds are rich in
iodine. Which are necessary nutrients that assist in plant metabolism. Seaweeds are good
soil conditioner they had a suitable content of nitrogen and potassium, but are
much lower in phosphorus than in traditional animal manure and typical N, P, K
ratios and chemical fertilizer. The large amounts of insoluble carbohydrate act
as soil conditioner, which improve aeration and soil structure. There
effectiveness as fertilizers also sometimes attributed to the trace elements
they contain, but the actual contribution they make is very small compared to
normal plant requirement (Blunden, 1991).

            Using
seaweed as fertilizer also increases overall nutrition, including protein
content (we’ve lost a lot of protein in our crops in the last 50 years).
Seaweed has been well studied and has become a mainstay of organic farming and
gardening. T. L. Senn did a lot of research on using seaweed as fertilizer back
in the day. He eventually wrote a great little book called ‘Seaweed and Plant
Growth.’  His research showed not only
the benefits for plant health and growth, but also that a quality liquid
seaweed can help control insect pests such as spider mites.

Seaweed Benefits

Seaweed has most
of the nutrients, but much less of them and also not much N-P-K. Where its
unique effect is due to plant growth hormones it contains that supercharge many
plant processes. It’s main benefit is boosting plant health, helping plants
deal with stress from extreme heat, cold, wind, drought and disease. Seaweed is
the most popular, and is often recommended, although it doesn’t supply all that
much nutrition on its own. Some seaweeds are microscopic, such as the
phytoplankton that live suspended in the water column and provide the base for
most marine food chains. Some are enormous, like the giant kelp that grow in
abundant “forests” and tower like underwater redwoods from their roots at the
bottom of the sea. Most are medium-sized, come in colors of red, green, brown,
and black, and randomly wash up on beaches and shorelines just about
everywhere.