Effect of lime, zinc and copper rates on the nutrient content and growth of corn (Zea mays L.) - (FAO fellowship report)

amendement calcique cinc cobre contenido de materia seca copper crecimiento croissance cuivre dry matter content enmiendas calizas growth liming materials mais maize minerales minerals nutrientes nutrients rendement rendimiento soil chemicophysical properties substance nutritive yields zea mays zinc