forestry centre
2.through the breeding test of 25 species excellent broadleaf in Jian Shuangjiang forestry centre and Nanchang trees garden,appling the general method of seeding can breed the tree seedling up to grade,but the method of seed stratification and the time of sowing are difference,in the time we discuss the root system and the producing capacity of tree seedling preliminarily.
3.According to the guidelines for plant protection equipment tests established by the German Federal(Biological) Research Centre for Agriculture and Forestry(BBA),measurements of the drift potential under(different) wind tunnel conditions(spray pressure,wind speed,temperature and relative humidity) were made for five typical nozzles.
