Abstract:
The investigations
conducted during 1995-2010 at the Podu-
Iloaiei Agricultural Research Station, Iași
County, have studied the influence of
different mineral fertilizers rates on wheat
and maize yield and soil agrochemical
characteristics. Soil erosion caused a
reduction in the percentage of aggregate by
14.5% to slightly eroded soil and 37.7% in
the strongly eroded soil. The percentage of
water stable aggregates was comprised
between 73.5% in non eroded soil, at the
bottom of slope land and 45.7% at the
highly eroded soil. On weakly and highly
eroded lands the content of organic carbon
from soil, after 44 years of experiences, has
decreased by 16.8-24.9% (3.3-4.9 g/kg soil)
at the unfertilized control and by 12.2-
18.3% (2.4-3.6 g/kg soil) at the rate of
N120P80. On weakly and highly eroded lands
the mean yield increases, obtained for each
kg of a.i. of applied fertilizer, were
comprised between 9.6 and 11.3 kg in wheat
and between 11.9 and 13.06 kg in maize
(N80P60-N160P100).
