Fuente: WIPO "tobacco agriculture" The utility model discloses a sampling device for precise monitoring tobacco field soil nitrogen burst size, sampling device include soil sample pipe, former soil layer, first adsorbed layer, second adsorbed layer and unsettled adsorbed layer, soil sample pipe from upwards having set gradually second adsorbed layer, first adsorbed layer, former soil layer and unsettled adsorbed layer down, the unsettled setting of unsettled adsorbed layer in the top of former soil layer 1.3~1.7cm department. The utility model discloses can can't harm soil structure and take a sample, at utmost simulation soilfield structure, does adsorbed layer wherein contain exchangeable zwitterion (NO3 with NH4+) adsorbed particle, can absorb the N of the inorganic attitude that the soil mineralize mineralization cameout, stop especially that the N eluviation of inorganic attitude falls in the soil. The utility model discloses can supply the N ability to carry out the real -time supervision sample to soil to the field this season or in a period, be particularly useful for original state soil or no -tillage soil, it be accurate to take a sample, and the detection is high -efficient, simple structure, convenientto use.