
Humic
Acid is a structure less colloidal material that has gone through
decomposition Humic Acid are also referred to as "humic substances"
and are used as soil conditioners, soil supplements, and fertilizer
amendments.
The colloidal nature of humic acid increases the water
holding capacity of soils. Humic Acid also carries with it hormones and
vitamins which promote germination as well as greater plant growth. Humic
Acid is a virtual storehouse of not only micro-nutrients, but also, holds
the essential macro-nutrients nitrogen, phosphate, and potassium. The most
important and bio-chemically active group of the many decomposed products of
soil organic matter, is the alkali soluble substance called humic acid.
Humates
will enhance the overall performance of the fertilizers to a point that an
actual reduction of basic N-P-K per 1,000 square feet may be appropriate
over time; enhance the development of root systems, enhance success of seed
germination and overall plant development; enhance overall plant health,
resistance to stress, and appearance.
They are dark brown to black
in color. It can be used as a foliar feed, sprayed directly on soil or
injected into the irrigation systems.

Humic
acids are colloids and behave somewhat like clays, even though the
nomenclature suggests that they are acids and form true salts. When the
cation exchange sites on the humic molecule are filled predominantly with
hydrogen ions, the material is considered to be an acid and is named
accordingly. However, it has no great effect on pH because the acid is
insoluble in water. When the predominant cation on the exchange sites is
other then hydrogen, the material is called humate. The humates of
monovalent alkali metals are soluble in water, but the humates of
multivalent metals are insoluble. Apart from their effect on the solubility
of the materials and their absorption by clays, the different cations have
little effect on the humic molecules.
The manifold effect of humic
substances on the plant, shown both in the external medium and in the
biochemical processes occurring in the plant, has been well demonstrated.
There
is a growing interest in the use of organic materials as fertilizers or soil
amendments. This may be attributed to: 1) an interest in the reduction of
the use of chemical fertilizers; 2) public concern for the potential
polluting effects of chemicals in the environment; and 3) a pressing need
for energy conservation. The research reported herein was conducted in an
effort to explore humate material as one of the organic natural resources
with the potential for meeting some of these needs.

1.
General |

Pre-sowing
treatment of seed with good hume solution with subsequent spraying of the
plant, in research showed significant increases in crop yields & much
improved root striking. e.g. Various cereal crops increased by 3 -5 centners
/ha after seed treatment. Buckwheat increased by 1.5 centner / ha.
2.
Barley |

Increase
over control samples in stalk length by 202% and 222% and increase in root
length by 234%. As a follow-on rotated crop to above maize ,barley normally
had reduced crop yield of 16% owing to residual effects of above mentioned
application of Atrazine on the maize, when Humate was not applied. When
Humate was applied, significant improvement in yield occured, ( eg: an
increase of 5.2 metric centners/ha, ( total 30.9 mc/ha ). A drop in residual
Atrazine levels of up to 71 % were recorded, inlcuding higher germinating
capacity, plus higher growth, mass and chlorophyll in the leaves of the
barley. Another trial of pre-treating barley seeds with 0.01 % solution
humate resulted in a cropy yield increase of 54%.
3.
Tomatoes |

Increase
in productivity by 20 -25 % (e.g. "Rivermoon" variety, 23%
increase yield, "Sonata" variety, 17.3 % increase yield) after
spraying with Potassium Humate solution rate of soaking of seeds in 0.01%
solution for 24 hours before planting in the ground, and subsequently
watered with a 0.005% solution at 10 litres/sq. Metre, 3 times a week.
4.
Cucumbers |

Increase
in productivity by 38% after treatment with Potassium Humate solution at
rate of (a) soaking of seeds in 0. 01% solution for 24 hours before planting
in the ground, and subsequently watered with a 0.005% solution at 10
litres/sq.metre, 3 times a week.
5.
Maize |

Applied
@ 5 kg / ha with 100 kg/ha N30P30 fertilizer and Atrazine ( 4kg/ha )
,resulting in a an increase crop yield of 10%. Reduction in nitrate levels
in mid-stage (milk wax) of crop ripeness in field experiments were from 707
mg/kg to 562 mg/kg.
6.
Cabbage |

Out
put of useful cabbage plants increased 60 %, and better root strike . Four
fold repeated trials in several varieties showed optimum application rates
of a) soaking of seeds in 0.01 % solution, and watering the cabbage plants.
7.
Potatoes |

Increased
harvest yield of 23%, improved potato quality, nitrate ,content in the
tubers decreased from 47 mg/kg to 18.5 mg/kg. Pre-sowing treatment of seed
potatoes tubers with 0.01 to 0.02% solution of Potassium Humate for 24
hours.