Claim · model-written summary
Leaves of -K trees had only 31 per cent of normal K2O on November 5.
Verbatim
t0“FRENCH PRUNE TREES GROWN IN CULTURE SOLUTIONS”
e1“Leaves from -K cultures were consistently high (on dry-weight basis) in N and P2O5 throughout the entire season of 1930”
e2“These leaves were about 30 per cent, above normal in CaO and MgO, but showed only 31 per cent, of normal K2O on November 5”
Title
H. L. Colby PLANT PHYSIOLOGY 1933. doi:10.1104/pp.8.3.357
Other claims from this paper (6)
- Intervention effect Leaves of -K trees were consistently high in N and P2O5 throughout the 1930 season.
- Intervention effect Leaves of -K trees were about 30 per cent above normal in CaO and MgO.
- Observation The CaO content of calcium-starved leaves started at 51 per cent of normal on May 15.
- Intervention effect Calcium-starved leaves were low in N and ash.
- Intervention effect Calcium-starved leaves were high in MgO and K2O throughout the season.
- Observation Trees starved for Ca, P and N had dropped all their leaves by the last collection.