Abstract:
Agrochemical mapping aims to monitor soil fertility to determine fertilizer requirements and includes field research,
laboratory determination and mapping of the distribution and range of pH and essential nutrients by conventional signs
and colors. Soil fertility is its fundamental and specific ability or capacity to provide plants with the necessary and
balanced amounts of nutrients, permanently and simultaneously, in the context of the other vegetation factors (water,
light, temperature, other physical and biological factors). Basically, fertility results from the complex and dynamic
interaction of soil constituents (primary and secondary minerals, clay minerals, humus, salts, etc.) with some physical
properties (texture, structure, aerobic regime) and other soil-specific processes (humification - mineralization,
adsorption - desorption - ion exchange, solubilization and nutrient cycling between ecosystem components). The
composite agrochemical sample consists of a number of subsamples, as follows: 25 for uniformly fertilized soils, 30 for
weakly and moderately eroded soils and 40 for strongly eroded soils, non-uniformly fertilized, depleted and organic
soils, soils from orchards, greenhouses and solariums. Geomorphologically, the territory of Probota village belongs to
the Moldavian Plain. This geomorphologic unit is a broad-veined hilly plain consisting of more or less fragmented hilly
interfluves. The Moldavian Plain is of sculptural origin, formed in the presence of a slightly erosive sandy-clay
substratum, unlike the oolitic sandstones and limestones of the neighboring regions. The land is situated in the Prut
valley, bounded on the long side by drainage canals, and another partly divides the plot in two. The altitude is between
39 and 41 m.
