SA 42799(2015/X) The subject of the contract is to carry out development works consisting of the development of a model and algorithms of the relationship between electrical permeability and the actual water content and electrical conductivity and mineral richness of various types of soils and substrates and verification of their correctness in real conditions. This work will be done for the following soil types: • clay sand, • clay • peat substrate • coconut substrate and for the following plants: • strawberry, • raspberry • tomato. The result will be the creation of special matrices, which will be implemented in the software of the existing soil moisture sensors offered by Inventia and will contribute to the importance of an improved product, which will be much more useful and easier to use than the version previously offered. Predefined programmes (matrixes and algorithms) for specific soils and plants will reduce the use of water used for irrigation and at the same time improve productivity per hectare with both ecological and purely economic benefits.