A trial of investigating impacts of nitrogen dressing at different stage on feeding value and physiological characteristics of forage summer maize (Ludan50) has
Translocation of previously accumulated nitrogen and carbohydrates from vegetative tissue of the wheat plant is a major assimilate source for grain filling. Thi
The cryo-fracture electron microscope was used to study the micro-structure of pesticide microemuisions. The hydromechanical radius (Rh) and the distribution (f