Wood Ash As A Source Of Fertilizer

Wood Ash As A Source Of Fertilizer

Wood ash is the inorganic and organic residue remaining after combustion of wood or unbleached wood fiber. The physical and chemical properties of wood ash vary significantly depending on many factors. Hardwoods usually produce more ash than softwoods, and the bark and leaves generally produce more ash than the inner woody parts of the tree. On average, the burning of wood results in 6 to 10 percent ashes. Therefore, wood ash composition can vary depending on geographical location and industrial processes. This makes testing the ash extremely important. 


Fertilizers a material of natural (organic) or synthetic (artificial or inorganic) origin that is applied to soils or to plant tissues to supply one or more nutrients essential to the growth of plants. (Nagesh Tallapragada, 2018). Since it’s created through the combustion of plant materials, it holds many of the elements needed to support new growth and has long been used by gardeners and farmers as a natural soil amendment. "When wood burns, nitrogen and sulfur are lost as gases, and calcium, potassium, magnesium and trace element compounds remain. The carbonates and oxides remaining after wood burning are valuable liming agents, raising pH, thereby helping to neutralize acid soils."Where soils are acidic and low in potassium, wood ash is beneficial to most garden plants except acid-loving plants such as blueberries, rhododendrons and azaleas. 


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