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Natural Farming Inputs

Water-Soluble Phosphoric Acid (WS-PA)


Phosphoric acid is a substance of the cell nucleus and major element of the reproductive body of the plant. If the plant is deficient in phosphoric acid, cell division is hindered and the reproductive growth is not good.

Phosphoric acid is an important element for the life of crops, it contained in every plant. Phosphoric acid is a substance that composes the cell nucleus.
Absorbed phosphoric acid is used for cellular division when it moves to the bud, root tip or seed.
The stem of Sesame (Zingly) contains large amounts of phosphoric acid, and is used in Natural Farming. Burn sesame stems into charcoal and percolate the charcoal to extract WS-PA.
Phytic acid, storage form of phosphoric acid, is the major substance in the seed. Phosphoric acid is involved in photo phosphorylation and electron transport in photosynthesis. Also, phosphoric acid affects transporting anabolites and in protein synthesis.
Materials / Ingredients Needed
Charcoal from sesame stems
Jar /Glass jar
Porous paper (Paper towel)
Rubber Band / thread
Make charcoal out of sesame stems. Natural phosphoric acid is abundant in those stems. Burn the sesame stems and put out the fire when large flames appear.
Put 1 Kg of sesame stem charcoal in the cloth bag and dip it in 5 liters of water in order to dissolve phosphoric acid in water (Crude Liquid of Natural phosphoric acid)
It takes about 7 days although the time varies depending on the temperature of the surroundings.
Use air to enter once in two days (blow air into the water with a tube). Phosphoric acid dissolves in water.
In 20 liters of water, 700 ml of WS-PA solution is added and mixed. The mixture is then applied during changeover period.
Dilute 700 ml of the crude WS-PA liquid with 20 liters of water when WS-PAis used alone.
Dilute WS-PA with water in the ratio of 1:1000, when it is used together with water-soluble calcium.
Apply WS-PA during the Change-over period. It promotes the differentiation of flower buds resulting in high fertility and yield.
WS-PAimproves the sugar content of fruits.
Apply WS-PAwhen the colours of leaves turn light or dark green.
The optimum temperature ranges from 23-25 °C.
It is good to select a cool and shaded place with no direct sunlight.
WS-P can easily travel within the plant and move to the vigorous new leaves first. As a result, symptoms of deficiency appear mainly on the petiole and veins of the old leaf.
The new leaf does not grow well and it becomes smaller and dark green in color.
The growth of flowers is noticeably suppressed, naturally bearing fewer fruits.
Usually the symptoms are dormant within the body. It is therefore difficult to recover, even considering the ability to cope with the disease when the symptoms appear on the exterior.
The fruit skin becomes thick and the acid content increases.