The influence of the addition of humic extract on mineral contents and
wheat yield (Triticum aestium L. cv, cajeme) was studied. The results
obtained reveal the positive influence of the addition of organic mat
ter, not only in the soil properties but also in the mineral nutrition
of the plant and in yield production. Nevertheless there is no direct
correlation, except in certain cases, between the dose of humic extra
ct added and the readings of the fixed parameters.