Abstract: This invention relates to a new formulation activating the absorption of mineral nutrients by plants. Consequently, it has also an effect on the metabolization of these mineral compounds by the plant. These formulations that have been discovered with this property activating nutrient absorption have as main component the compounds represented by general formula 1 CH3—S—CH2—CH2—CH(OR1)—COR2??1 where R1 is selected from the group formed by hydrogen, alkyl rests, (preferably methyl or ethyl), and aryl: while R2 is selected from the group formed by hydroxyl, amides, alkyl rest esters (preferably methyl or ethyl), or aryl. When the rest is hydroxyl, acid salts with monovalent cations, preferably Na+ and K+, polyvalent cations, preferably Cu++ and Fe+++, and electropositive organic compounds such as amines (e.g., ethanolamine) are also considered.

Abstract: The object of the present invention is a new set of formulations with the potential to increase the efficiency of a plant's assimilation of nutrients both in normal conditions and in conditions of nutrient deficiency. It is especially effective in the case of iron assimilation in conditions of deficiency of this micronutrient, by improving and potentiating a plant's specific response to iron deficiency, increasing the plants capacity to mobilize and assimilate the iron present in non-assimilable forms.