The objectives of the study were: to emphasize the public goods associated to soybean crop; and to qualitatively appreciate the multi-annual variation of soil biodiversity cohabitating with the soybean roots and the Rhizobium bacteria. The researchers were performed in the Eastern part of the Romanian Plain, in Southern Bărăgan Plain, Perișoru region. The soil is Vermic Chernozem (according to SRTS-2012 and WRB-SR-2014) formed in carbonate loess like deposits. The climate is temperate continental with the average annual temperature of 10.8°C, and the average annual precipitation of 480 mm. The main environmental public goods associated with the soybean crop and analyzed in this paper were: 1) soil quality and land capability; 2) water quality and availability; 3) biodiversity of agricultural land. Soil quality was analyzed based on the analytical data of physical, hydro-physical and chemical parameters of the soil. The land capability was quantified based on the values of the ecopedological indicators used for the land evaluation, both for land favourability and land quality. In this respect, for soybean, 72 points were obtained, which included the land from the studied site in the third class of favourability. The quality and the availability of water resources are also public goods associated with soybean crop, thus the water from the wells (located in the studied plot) was analyzed, the data showing normal limits for all analyzed water parameters. Regarding the multi-annual variation of the biodiversity, under intensive/irrigated soybean crop, the soil biodiversity did not change, while the upper-ground biodiversity was closely related to the plant changes into the crop rotation and consequently, many species being specialized accompany each crop within the crop rotation.

No abstract