Abstract
A technique is presented which permits the quantitative estimation of fertilizer phosphorus in plants at any desired time during the growth cycle without harvesting the plants. The radioactivity of the growing plants was determined in situ by a thin-walled aluminum Geiger-Mueller tube assembly. The in-situ activity was found to be highly correlated with the fertilizer-phosphorus content (mg./pot) at any one stage of growth of oats (r = 0.975), corn (r = 0.966), and sugar beets (r = 0.813). The relationship between the in-situ activity and the fertilizer-phosphorus content varied with plant height. Regression equations are presented relating the fertilizer-phosphorus content to the in-situ activity and plant height. Correlation coefficients for the regression equations were 0.943, 0.914, and 0.902 for oats, corn, and sugar beets respectively. The coefficient of variation of the fertilizer-phosphorus content of sugar beets using the regression equation was 15.3 per cent, whereas that using the briquet technique was 16.1 per cent.
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Claims 8
Claim · model-written summary
In-situ radioactivity correlated with fertilizer phosphorus content in oats at r = 0.975.
- Taxon
- oats
Avena sativae0 - Outcome
- fertilizer-phosphorus contente0
- Value
- r = 0.975e0
- Qualifier
- in-situ activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The in-situ activity was found to be highly correlated with the fertilizer-phosphorus content (mg./pot) at any one stage of growth of oats (r = 0.975), corn (r = 0.966), and sugar beets (r = 0.813).”
Claim · model-written summary
In-situ radioactivity correlated with fertilizer phosphorus content in corn at r = 0.966.
- Taxon
- corn
Zea mays subsp. mayse0 - Outcome
- fertilizer-phosphorus contente0
- Value
- r = 0.966e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The in-situ activity was found to be highly correlated with the fertilizer-phosphorus content (mg./pot) at any one stage of growth of oats (r = 0.975), corn (r = 0.966), and sugar beets (r = 0.813).”
Claim · model-written summary
In-situ radioactivity correlated with fertilizer phosphorus content in sugar beets at r = 0.813.
- Taxon
- sugar beets
Beta vulgaris subsp. vulgarise0 - Outcome
- fertilizer-phosphorus contente0
- Value
- r = 0.813e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The in-situ activity was found to be highly correlated with the fertilizer-phosphorus content (mg./pot) at any one stage of growth of oats (r = 0.975), corn (r = 0.966), and sugar beets (r = 0.813).”
Claim · model-written summary
The relationship between in-situ activity and fertilizer phosphorus content varied with plant height.
- Taxon
- plantsViridiplantaet0
- Organ / stage
- plant heighte0
- Outcome
- relationship between the in-situ activity and the fertilizer-phosphorus contente0
Not reportedDirection
Verbatim
e0“The relationship between the in-situ activity and the fertilizer-phosphorus content varied with plant height.”
t0“GROWING PLANTS”
Claim · model-written summary
The regression correlation coefficient was 0.943 for oats.
- Taxon
- oatsAvena sativae0
- Outcome
- Correlation coefficients for the regression equationse0
- Value
- 0.943e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation coefficients for the regression equations were 0.943, 0.914, and 0.902 for oats, corn, and sugar beets respectively.”
Claim · model-written summary
The regression correlation coefficient was 0.914 for corn.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Correlation coefficients for the regression equationse0
- Value
- 0.914e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation coefficients for the regression equations were 0.943, 0.914, and 0.902 for oats, corn, and sugar beets respectively.”
Claim · model-written summary
The regression correlation coefficient was 0.902 for sugar beets.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarise0
- Outcome
- Correlation coefficients for the regression equationse0
- Value
- 0.902e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation coefficients for the regression equations were 0.943, 0.914, and 0.902 for oats, corn, and sugar beets respectively.”
Claim · model-written summary
The regression equation gave 15.3 per cent coefficient of variation for sugar-beet phosphorus content, versus 16.1 per cent for the briquet technique.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarise0
- Outcome
- coefficient of variation of the fertilizer-phosphorus contente0
- Value
- 15.3 per cente0
- Qualifier
- 16.1 per cente0
- Comparator
- briquet techniquee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The coefficient of variation of the fertilizer-phosphorus content of sugar beets using the regression equation was 15.3 per cent, whereas that using the briquet technique was 16.1 per cent.”