This is a preview. Log in through your library . Abstract Soybean stems were grafted between the first and second nodes 6 weeks after planting. Three or 5 weeks after grafting, one root system was cut ...

Feeding experiments using 15N2 or 15NO3 are described investigating the transport of nitrogen in the field pea (Pisum arvense L.). Nitrogen assimilated by root or nodules moves preferentially upwards ...