Researches on the influence of sowing density on sweet lupine yield

Lupine is cultivated on quite limited areas in Romania, the information about the culture of this legume is scarce and may be one of the reasons why lupine is not found in the crop structure. Through the experience established, during 2016-2017, at the Turda Agricultural Development Research Station (ARDS), located in the hilly area of ​​the Transylvanian Plain, the behavior of two varieties of white lupine (sweet) and the productivity of the plants under the influence of pedoclimatic conditions of the years 2016-2017 and some technological elements, in the present case - sowing density. Of the two varieties, the Romanian variety recorded a slightly higher yield than the variety of foreign origin. Lupine reacts positively to density of 15-22 pl/sqm, recording yields of 3828 kg/ha (22 pl/sqm) and 3223 kg/ha (15 pl/sqm), respectively. At the density of 11 pl/sqm the yield drops significantly. The rainfall deficit during the period of flowering-pod formation, calendrically the first half of June - the first half of August, also contributes to the decrease in yield.