Biodynamic Preparations and Formulations

In this section you will find information on the preparations that are unique to the Bio-dynamic Method of Farming.
Click on the links below to discover a new world of making and applying preparations to enhance the earthly and cosmic influences in a farm system.

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Liquid manures are used extensively in cropping and fruit production, particularly to supply nutrients during the transition period when changing to an organic management system. 

Method of Making Liquid Manures

A large number of different liquid manures can be made on the farm out of locally available plant materials, also cow dung, which are fermented with BD preps 502-507. Most liquid manures take from 8 to 12 weeks to be ready.

Prepare liquid manures 2 days before Full Moon.

Raw Stock

For Nitrogen

  • Tree foliage such as gliricidia, erythrina, subabul, sesbania
  • Legume green crops, such as sunhemp, cowpea, horse gram, crotalaria or alfalfa
  • Oil cakes such as cotton seed, neem, or coconut
  • Animal dung such as cow dung or chicken dung or fish wastes.

For Phosphorous

  • Animal dung such as cow dung or chicken dung

For Trace Elements

  • Sea weed

For Insect Repellent

  • The foliage of neem, calotropis, African marigold flowers, stinging nettle or dathura

For Fungus

  • Casuarina, tree foliage such as gliricidia, erythrina, subabul, sesbania
  • Legume green crops, such as sunhemp, cowpea, horse gram, crotaleria or alfafa
  • Oil cakes such as cotton seed, neem, or coconut
  • Animal dung such as cow dung or chicken dung or fish wastes.

Various weeds can also be used.. Weeds in the field show up as a deficiency in the soil, if placed back into the soil they help balance the deficiency to an extent. However, ensure the weeds are from an organic area, as in this process of liquid manures there is no heat produced and therefore synthetic material cannot be broken down.

Earthen Container

A large earthen pot or, more commonly, a 200 litre food grade plastic drum can be used for all the liquid manures.

Fill the drum 3/4 full with the plant material and cover with water. Introduce the BD preparations 502-506 by placing 1 gram (1 teaspoonful) of each of the preps separately in a small handful of straw or coconut fibre pressed into the shape of a birds' nest. The prep is placed inside the nest and squeezed closed. It is then placed just below the surface of the liquid beneath the foliage. The BD 507 is stirred in a small amount of water and poured into the drum.

The BD507 is stirred in a small amount of water and poured into the drum

Place 2-3 bricks on the surface of the foliage to keep the leaves below the water level. Cover with a gunny sack to stop evaporation. Check the water level each week as high temperatures can evaporate the water. Stir after 2 weeks and then daily to encourage a good aerobic fermentation.. Ready to use in about 2 months. The plant material may become very frothy and fizzy after a few days, with the use of BD preps 502-507. Every type of liquid manure will have its own particular aroma by which after a time the farmer can assess the quality of the liquid manure.

It is a good idea to have all your liquid manures in a shade house, along with the CPP. This will help avoid evaporation.

Cow Dung Slurry

Cow dung slurry also makes a wonderful liquid manure. 

  • Use 1/3 drum of dung, to a full drum of water, adding the preps BD 502-507 as above.
  • It matures in 2-3 months and should sit until it smells good.
  • It will last up to six months.

Oil Cakes

  • When making liquid manure from oil cakes, the cake first needs to be broken up into small pieces.
  • Use 12.5 kgs of cake to a 200 litre drum of water. Mix well. Then add the BD preps.

Application of Liquid Manures

  • Apply 2 days before the Full Moon, in the evening.
  • The usual rate of application for all the liquid manures is 1:10. That is : 4 litres of liquid manure to 40 litres of water, stirred for 10 minutes, per acre. Or 10 litres in 100 litres per hectare.
  • Spray the foliage of crops every 2 weeks up to the last two weeks before harvest.
  • It has been found effective to alternate a cycle of 2 weeks liquid manure followed by 2 weeks of CPP.

Raw Materials for Various Liquid Manures

Intended Benefits

  •  Easy and quick way to get BD preps into the soil
  • Help provide trace elements to the soil and plants
  • Aids in the formation of humus
  • Acts as a plant tonic
  • Good for insect control