(AU2013351918) 1. A soil additive comprising a sugar ferment wherein said ferment contains signalling molecules comprising between about 1-50% of the organic matter present in the ferment. 2. The soil additive of claim 1 wherein the signalling molecules are selected from one or more of the following groups: microbial quorum sensors and quenchers, biocides and/or plant elicitors. 3. The soil additive of claim 1 wherein the signalling molecules are selected from one or more of the following: phenolic compounds and/or organic acids. 4. The soil additive of claim 1 wherein the sugar ferment contains signalling molecules comprising between about 1-50%, 5-50%, 10- 45%, 15-40%, 20-40%, 20-30% or 20-25% of the organic matter present in the ferment. 5. A soil additive comprising a molasses ferment wherein said ferment contains signalling molecules comprising between about 20-25% of the organic matter present in the ferment. 6. A method for producing a soil additive comprising the step of: a) fermenting sugar using a microbe under conditions of high metabolic stress wherein the conditions of high metabolic stress result in production of high levels of signalling molecules by the microbe. 7. The method of claim 6 wherein the sugar ferment produced contains signalling molecules comprising between about 1-50% of the organic matter present in the ferment. 8. The method of claim 6 or 7 wherein the high metabolic stress is provided by one or more conditions chosen from the list comprising: high ionic strength, high osmotic pressure, and/or anaerobic or oxidative stress. 9. The method of claim 8 wherein the high metabolic stress is provided by a combination of high ionic strength and high osmotic pressure and oxidative stress. 10. The method of claim 5 wherein the high ionic strength and high osmotic pressure is produced by reducing the amount of water in the fermentation mixture to between 0.5x and 4.0x (v/v) the volume of solids in the fermentation mixture. 11. The method of claim 5 wherein the oxidative stress is produced by reducing the oxygen level to between about 0.1 and 8.5 ppm dissolved 02. 12. For conditioning soil, comprising: a) soil additive comprising a sugar ferment wherein said ferment contains signalling molecules comprising between about 1-50% (w/w) of the organic matter present in the ferment; and b) instructions for administration of said soil additive. 13. A method for conditioning soil, comprising the step of: a) adding to the soil an amount of soil additive comprising a sugar ferment wherein said ferment contains signalling molecules comprising between about 1-50% (w/w) of the organic matter present in the ferment. 14. Method for promoting plant growth and/or increasing crop yield, comprising the step of: a) adding to the soil an amount of soil additive comprising a sugar ferment wherein said ferment contains signalling molecules comprising between about 1-50% (w/w) of the organic matter present in the ferment. 15. Method for modifying the population composition of rhizosphere microflora, comprising the step of: a) adding to the soil an amount of soil additive comprising a sugar ferment wherein said ferment contains signalling molecules comprising between about 1-50% (w/w) of the organic matter present in the ferment. 16. Method for increasing the wetting of a soil, comprising the step of: a) adding to the soil an amount of soil additive comprising a sugar ferment wherein said ferment contains signalling molecules comprising between about 10-50% (w/w) of the organic matter present in the ferment.
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