Abstract
The effect of different amounts of phosphorus, potassium, nitrogen, and calcium upon the development of the foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B. was studied in the greenhouse. The wheat grains were planted in sterilized pure quartz sand to which the necessary nutrients and spore suspension of the pathogen were added. The experiments were maintained under aseptic conditions during the first ten days. The disease increased when the ionic concentration of potassium, nitrogen, and calcium was decreased below that of the complete nutrient solution, but no significant reduction of the disease was observed when the concentrations of all of the elements, including phosphorus, were increased above those in the complete nutrient solution. Apparently extremely small concentrations of phosphorus had no effect on the disease one way or the other. These conclusions apply to the disease on the seedling stage of wheat.
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Claims 5
Claim · model-written summary
Lower potassium concentration increased wheat foot rot.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- potassiume0
- Interactor
- Helminthosporium sativum P. K. & B.e1pathogen
- Outcome
- foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.e1
- Direction
- increasede0
- Comparator
- complete nutrient solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease increased when the ionic concentration of potassium, nitrogen, and calcium was decreased below that of the complete nutrient solution”
e1“foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.”
Claim · model-written summary
Lower nitrogen concentration increased wheat foot rot.
- Taxon
- wheatTriticum aestivume1
- Treatment
- nitrogene0
- Interactor
- Helminthosporium sativum P. K. & B.e1pathogen
- Outcome
- foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.e1
- Direction
- increasede0
- Comparator
- complete nutrient solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease increased when the ionic concentration of potassium, nitrogen, and calcium was decreased below that of the complete nutrient solution”
e1“foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.”
Claim · model-written summary
Lower calcium concentration increased wheat foot rot.
- Taxon
- wheatTriticum aestivume1
- Treatment
- calciume0
- Interactor
- Helminthosporium sativum P. K. & B.e1pathogen
- Outcome
- foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.e1
- Direction
- increasede0
- Comparator
- complete nutrient solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease increased when the ionic concentration of potassium, nitrogen, and calcium was decreased below that of the complete nutrient solution”
e1“foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.”
Claim · model-written summary
Increasing all nutrient concentrations above the complete solution did not significantly reduce foot rot.
- Taxon
- wheatTriticum aestivume1
- Treatment
- concentrations of all of the elements, including phosphoruse0
- Outcome
- foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.e1
- Direction
- no significant reductione0
- Comparator
- complete nutrient solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant reduction of the disease was observed when the concentrations of all of the elements, including phosphorus, were increased above those in the complete nutrient solution”
e1“foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.”
Claim · model-written summary
Extremely small phosphorus concentrations apparently had no effect on wheat foot rot.
- Taxon
- wheatTriticum aestivume1
- Treatment
- extremely small concentrations of phosphoruse0
- Outcome
- foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.e1
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparently extremely small concentrations of phosphorus had no effect on the disease one way or the other.”
e1“foot-rot disease of wheat caused by Helminthosporium sativum P. K. & B.”
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See all 54 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.