Biosolarization provides a sustainable, organic method to soil disinfection and control of nematodes, phytoparasitic fungi and weeds in preparation for crop planting. The high temperatures that are produced during the decomposition process in addition to solar radiation create an effect that controls pathogenic microorganisms in the soil. In applying and incorporating organic matter into the soil, there is a series of microbiological changes that are produced. There is a proliferation of microorganisms that feed off of and obtain energy from the decomposing material, which facilitates its growth and accelerates the process. The organic material decomposition stimulates the development of both beneficial and pathological organisms in the soil, which reproduce and die. They thereby generate organic products (like amonia, nitrate, hydrogen sulphide, etc.) that help control soil pathogens. These products primarily produce a nematicidal effect on egg incubation and on the mobility of these species. Some types of organic material that can be used include cow manure, sheep manure and fowl droppings, as well as leftover scraps from cruciferous plants and mulch made of tomato plants.