Soybean yield in the Democratic Republic of Congo (D.R.C.) does not exceed 800 kg/ha. The present study focused on the application of calcium, phosphorus, and potassium to improve growth and yield components. The experimental cultivar was TGX1830-20, adapted to the edaphoclimatic conditions of the cultivation areas in the southwest and central regions of the D.R.C. The growth and yield components evaluated in this trial were stem thickness and length, number of nodes and pods, and finally seed dry weight. The results obtained show that the application of the three minerals improved all the parameters tested. The application of the three minerals (Ca, K, and P) to the soil made it possible to reach one ton of soybean grain per hectare in the absence of the preferred species Bradyrhizobium japonicum.

The elders ate and treated themselves with native plant species, some of which have not been domesticated and others are now experiencing the beginning of domestication. To avoid their extinction on the one hand and to enrich the range of cultivable plant species on the other, we have opted to conduct a preliminary trial of domestication of leafy vegetables and fruits. The retained parameters for the experiment were the emergence of the seedlings, the growth in both thickness and length, the plant movements, the effect of illumination on the species, the flowering and the developmental cycles as well as the setting in place of the tested species in agroforestry. From this study it appears that the seedling emergence differs between species, the growth in thickness correlates positively with the final species size, and the twining and tendril plants excel in terms of growth in length. The study of the illumination effect has made possible to categorize these species into heliophilous, sciaphilous and indifferent plants. As far as flowering is concerned, a distinction is made between annual and perennial plants in this batch. Finally, sciaphilous plants have integrated the agroforestry system by making them evolve under woody species with multiple uses.