In our country, the problem of the structure crops has an important place, since the proportion of large grains which required by the national economy and the decreased number of agricultural species grown since 1990 at the country level. This requires systemic thinking and a complex view from the experts and practitioners, as regards the rational crop rotation respecting the principles of modern and efficient agriculture. Regarding maize, the data obtained in 9 years of testing shows that have a better behavior in monoculture than wheat. Borcean I., (1992) show that in the extended monoculture of corn reduces humus content, the structure degrades, a progressive acidification of the soil, the soil is exhausted in the macro and micro elements recommending the use of rotation for 4-6 years. Results from the world shows that fertilization contributes 30-50% to increase yields per unit area, the most cultivated plants and products from various countries of the world are closely correlated with the types and doses of fertilizers used.

maize; fertilization; yields

Presentation: oral