Abstract
Abstract Zinc uptake from Ritzville fine sandy loam in pots was measured by successive cropping with two crops of milo, four cuttings of Ladino clover and a final crop of milo. The zinc treatments consisted of 4 pounds zinc (as sulfate) per acre applied initially, and none. The 4 nitrogen treatments in factorial combination with the zinc treatments applied to each of the first 2 crops of milo were none, and 200 pounds nitrogen per acre as (NH 4 ) 2 SO 4 , NH 4 NO 3 , and NaNO 3 , respectively. No nitrogen was applied to the clover; 200 pounds nitrogen per acre were applied uniformly to all treatments during the growth of the final milo crop. Significant yield increases due to zinc application were obtained on the second and third crops of milo and the first cutting of clover when NaNO 3 was used as a nitrogen source. A range in soil pH from 5 to 7.3 resulted depending on the nitrogen source. Zinc uptake by all crops was increased by the initial zinc application. Nitrogen application generally increased the uptake of both native and applied zinc, the effect depending on the change in pH brought about by the nitrogen carrier. NaNO 3 tended to decrease uptake of native zinc except on the first two crops of milo. Uptake of indigenous zinc where the soil pH had been lowered to 5 by use of (NH 4 ) 2 SO 4 was equal to that obtained with 4 pounds of ZnSO 4 when the soil pH was raised to 7.3 using NaNO 3 . Multiple regression analysis of the Zn uptake data indicated that the diverse effects of nitrogen sources could be explained by shifts in soil pH and by differences in plant growth. Only a small portion of the applied zinc was utilized by any one crop, and the utilization changed little with cropping. Zinc applied as sulfate remained available during the cropping sequence.
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Claims 10
Claim · model-written summary
Zinc increased second and third milo yields under NaNO 3.
- Taxon
- milo
Sorghum bicolore0 - Treatment
- zinc applicatione0
- Outcome
- yielde0
- Direction
- increasese0
- Qualifier
- second and third crops of miloe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant yield increases due to zinc application were obtained on the second and third crops of milo and the first cutting of clover when NaNO 3 was used as a nitrogen source.”
Claim · model-written summary
Zinc increased first-cutting clover yield under NaNO 3.
TrifoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant yield increases due to zinc application were obtained on the second and third crops of milo and the first cutting of clover when NaNO 3 was used as a nitrogen source.”
Claim · model-written summary
Initial zinc application increased crop zinc uptake.
- Taxon
- miloSorghum bicolore1
- Treatment
- initial zinc applicatione0
- Outcome
- Zinc uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc uptake by all crops was increased by the initial zinc application.”
e1“two crops of milo, four cuttings of Ladino clover”
Claim · model-written summary
Nitrogen application generally increased zinc uptake.
- Taxon
- miloSorghum bicolore1
- Treatment
- Nitrogen applicatione0
- Outcome
- uptake of both native and applied zince0
- Direction
- increasede0
- Qualifier
- depending on the change in pH brought about by the nitrogen carriere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application generally increased the uptake of both native and applied zinc, the effect depending on the change in pH brought about by the nitrogen carrier.”
e1“two crops of milo, four cuttings of Ladino clover”
Claim · model-written summary
NaNO 3 tended to decrease native zinc uptake except in first two milo crops.
- Taxon
- miloSorghum bicolore0
- Treatment
- NaNO 3e0
- Outcome
- uptake of native zince0
- Direction
- decreasee0
- Qualifier
- except on the first two crops of miloe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaNO 3 tended to decrease uptake of native zinc except on the first two crops of milo.”
Claim · model-written summary
Indigenous zinc uptake at pH 5 equaled uptake with applied ZnSO 4 at pH 7.3.
- Taxon
- miloSorghum bicolore1
- Outcome
- Uptake of indigenous zince0
- Direction
- equale0
- Qualifier
- soil pH had been lowered to 5e0
- Comparator
- 4 pounds of ZnSO 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake of indigenous zinc where the soil pH had been lowered to 5 by use of (NH 4 ) 2 SO 4 was equal to that obtained with 4 pounds of ZnSO 4 when the soil pH was raised to 7.3 using NaNO 3 .”
e1“two crops of milo, four cuttings of Ladino clover”
Claim · model-written summary
Regression attributed nitrogen source effects to soil pH and plant growth.
- Taxon
- miloSorghum bicolore1
- Outcome
- diverse effects of nitrogen sourcese0
- Qualifier
- shifts in soil pH and by differences in plant growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple regression analysis of the Zn uptake data indicated that the diverse effects of nitrogen sources could be explained by shifts in soil pH and by differences in plant growth.”
e1“two crops of milo, four cuttings of Ladino clover”
Claim · model-written summary
Each crop utilized only a small portion of applied zinc.
- Taxon
- miloSorghum bicolore1
- Outcome
- small portion of the applied zinc was utilizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only a small portion of the applied zinc was utilized by any one crop, and the utilization changed little with cropping.”
e1“two crops of milo, four cuttings of Ladino clover”
Claim · model-written summary
Utilization changed little with cropping.
- Taxon
- miloSorghum bicolore1
- Outcome
- utilizatione0
- Direction
- changed littlee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only a small portion of the applied zinc was utilized by any one crop, and the utilization changed little with cropping.”
e1“two crops of milo, four cuttings of Ladino clover”
Claim · model-written summary
Zinc applied as sulfate remained available through cropping.
- Taxon
- miloSorghum bicolore1
- Outcome
- Zinc applied as sulfate remained availablee0
- Qualifier
- during the cropping sequencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc applied as sulfate remained available during the cropping sequence.”
e1“two crops of milo, four cuttings of Ladino clover”
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