Abstract
Leaf samples were taken for analysis, from the entire group of French prune trees starved for various elements (2), at three dates during 1930, the second year of starvation. The first collections were on May 15, the second on July 25, and the third and last on November 5. By the time of the last collection, several groups of trees (-Ca, -P, -N) had dropped all of their leaves, and therefore no analyses are reported for leaves of these groups, and for this date. In most respects, the second year analyses (tables I, II; figs. 1, 2) agree with the analyses of the leaves taken at the close of the 1929 season. Leaves from -K cultures were consistently high (on dry-weight basis) in N and P2O5 throughout the entire season of 1930. 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. The CaO content of leaves starved for calcium started at 51 per cent, of normal (on May 15), and fell to 38.6 per cent, normal by July 25. They were low in N and in ash, and high in MgO and K2O throughout the season.
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Claims 7
Claim · model-written summary
Leaves of -K trees were consistently high in N and P2O5 throughout the 1930 season.
- Taxon
- French prune treest0
- Treatment
- -K culturese1
- Outcome
- N and P2O5e1
- Direction
- highe1
- Qualifier
- on dry-weight basise1
- Setting
- culture solutionst0
Not reportedComparator
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”
Claim · model-written summary
Leaves of -K trees were about 30 per cent above normal in CaO and MgO.
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”
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”
Claim · model-written summary
The CaO content of calcium-starved leaves started at 51 per cent of normal on May 15.
Verbatim
t0“FRENCH PRUNE TREES GROWN IN CULTURE SOLUTIONS”
e3“The CaO content of leaves starved for calcium started at 51 per cent”
Claim · model-written summary
Calcium-starved leaves were low in N and ash.
Not reportedComparator
Verbatim
t0“FRENCH PRUNE TREES GROWN IN CULTURE SOLUTIONS”
e3“The CaO content of leaves starved for calcium started at 51 per cent”
e5“They were low in N and in ash, and high in MgO and K2O throughout the season”
Claim · model-written summary
Calcium-starved leaves were high in MgO and K2O throughout the season.
Not reportedComparator
Verbatim
t0“FRENCH PRUNE TREES GROWN IN CULTURE SOLUTIONS”
e3“The CaO content of leaves starved for calcium started at 51 per cent”
e5“They were low in N and in ash, and high in MgO and K2O throughout the season”
Claim · model-written summary
Trees starved for Ca, P and N had dropped all their leaves by the last collection.
Verbatim
t0“FRENCH PRUNE TREES GROWN IN CULTURE SOLUTIONS”
e0“several groups of trees (-Ca, -P, -N) had dropped all of their leaves”