Abstract
1. The interaction of physical conditions of the soil and the establishment of plant together with its subsequent growth and yield have been studied for wheat and swedes on a variable piece of land, maintained as a uniformity trial. 2. Ploughing draught was taken as a criterion of the physical condition of the soil and various simple measurements on the crop were made from time to time during growth. 3. The establishment of wheat showed substantial negative correlations with ploughing draught but the correlations between ploughing draught and the performance of the plant diminished as growth progressed. This was shown to be the result of the overwhelming importance of the spacing factor operating beneficially on plots where the plant was abnormally poor. The effect of this factor is traced step by step. 4. Swedes differing from wheat in almost every detail of cultivation and growth, cycle showed no correlation between soil conditions and germination or between the various growth stages and physical soil conditions. The highest significant correlation was between the number of roots per plot after singling and ploughing draught and an explanation of this is given. 5. There was a significant but only moderate correlation between the yields of the two crops.
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Claims 7
Claim · model-written summary
Wheat establishment correlated negatively with ploughing draught.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- establishment of wheate0
- Direction
- negative correlationse0
- Setting
- ploughing draughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The establishment of wheat showed substantial negative correlations with ploughing draught”
Claim · model-written summary
Correlations between ploughing draught and wheat performance diminished as growth progressed.
- Taxon
- wheatTriticum aestivume1
- Outcome
- correlations between ploughing draught and the performance of the plante0
- Direction
- diminishede0
- Setting
- ploughing draughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the correlations between ploughing draught and the performance of the plant diminished as growth progressed”
e1“The establishment of wheat”
Claim · model-written summary
Spacing benefited wheat plots with abnormally poor plant stands.
- Taxon
- wheatTriticum aestivume1
- Outcome
- operating beneficially on plots where the plant was abnormally poore0
- Qualifier
- spacing factore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the overwhelming importance of the spacing factor operating beneficially on plots where the plant was abnormally poor”
e1“The establishment of wheat”
Claim · model-written summary
Swede germination did not correlate with soil conditions.
Verbatim
e0“Swedes differing from wheat in almost every detail of cultivation and growth, cycle showed no correlation between soil conditions and germination”
Claim · model-written summary
Swede growth stages did not correlate with physical soil conditions.
Verbatim
e0“no correlation between soil conditions and germination or between the various growth stages and physical soil conditions”
e1“Swedes differing from wheat”
Claim · model-written summary
Number of swede roots after singling correlated significantly with ploughing draught.
Not reportedDirection
Verbatim
e0“The highest significant correlation was between the number of roots per plot after singling and ploughing draught”
e1“Swedes differing from wheat”
Claim · model-written summary
The yields of wheat and swedes had a significant moderate correlation.
Not reportedDirection
Verbatim
e0“There was a significant but only moderate correlation between the yields of the two crops.”
e1“wheat and swedes”