Three nutrients are recognized from the quantitative point of view as main: nitrogen (N), phosphorus (P) and potassium (K), followed by sulfur (S), calcium (Ca) and magnesium (Mg) as secondary elements and another group of which plants need only small amounts and are known as trace elements; iron (Fe), zinc (Zn), manganese (Mn), copper (Cu), boron (B) and molybdenum (Mo)....

The soil system is complex, dynamic and diverse, in it are mineral substances, gaseous elements and a large number of living and decomposing plant and animal organisms. Soil organic matter influences almost all important properties that contribute to soil quality, despite representing a small percentage of the weight of most soils (1% – 6%). The quality and quantity...

Among the most significant demands and mandates that are being received by research institutions, technology transfer centers, municipal organizations, non-governmental organizations and international cooperation agencies, is the development and transfer of appropriate technology. for food production in cities or their peripheries. Within this context, the generation and...

Plants and crops need nutrients for their proper development and optimal crop performance. These nutrients are taken from the air through the leaves (CO2 and O2) and, mainly, from the soil through the roots (macronutrients: N, P, K, Ca, Mg, S and micronutrients: Fe, Mn, Zn, Cu, B…). For a soil or substrate to have and provide all the nutrients that the plant needs, it is...

For the action of microorganisms to be efficient, environmental requirements must be known, including humidity, temperature and pH. There is a greater diversity of microorganisms in environments with a neutral pH between values of 6 to 8 and with temperatures between 15-45°C (50-113°F). The reproduction or inoculation of ME is carried out under anaerobic fermentation....

The estimates of poisonings and deaths made by the World Health Organization (WHO) and the United Nations over three decades dramatically reflect the growing tragedy that, for millions of people, particularly in southern countries, has signified the agricultural production model known as the green revolution. This crisis is deepening under the so-called new green...