Abstract
Research was conducted at two locations in 2009 and 2010 to evaluate the effect of various K rates and application methods on the yield and quality of flue‐cured tobacco ( Nicotiana tabacum L.). Treatments included five rates of K from sulfate of potash magnesia (0–0–22): 0, 84, 140, 196, and 252 kg K 2 O ha −1 that were applied: broadcast 1 mo before transplanting, broadcast 1 wk before transplanting, banded at transplanting, and a split application with one‐half rate banded at transplanting followed by one‐half rate banded at layby. Tissue samples were collected throughout the season at three separate growth stages: layby, topping, and after curing. Tissue samples were analyzed for total alkaloid and reducing sugars, N, P, K, and Mg content. Soil samples were collected the same day as K fertilizer application from plots not receiving supplemental K. Data were subjected to ANOVA using the PROC GLM procedure in SAS. Treatment means were separated using Fisher’s Protected LSD test at p ≤ 0.05. Application method and timing had no effect on any measured parameters; furthermore, crop yield and quality was not affected by K rates >0 kg K 2 O ha −1 at three of four locations. It is likely that early broadcast applications of K 2 O with current rate recommendations would only be of concern with combinations of conditions that included coarse soil textures, low K indices, and/or excessive leaching rainfall.
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Claims 3
Claim · model-written summary
Application method and timing of potassium had no effect on any measured parameter of flue-cured tobacco.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume2 - Treatment
- Application method and timinge1
- Outcome
- measured parameterse1
- Direction
- had no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Application method and timing had no effect on any measured parameters”
e2“Nicotiana tabacum L.”
Claim · model-written summary
Potassium rates above 0 kg K2O/ha did not affect crop yield or quality at three of four locations.
- Taxon
- Nicotiana tabacumNicotiana tabacume2
- Treatment
- K rates >0 kg K 2 O ha −1e3
- Outcome
- crop yield and qualitye3
- Direction
- not affectede3
- Qualifier
- at three of four locationse3
- Comparator
- 0 kg K 2 O ha −1e3
- Setting
- two locations in 2009 and 2010e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nicotiana tabacum L.”
e3“crop yield and quality was not affected by K rates >0 kg K 2 O ha −1 at three of four locations”
e4“Research was conducted at two locations in 2009 and 2010”
Claim · model-written summary
Early broadcast potassium applications would be of concern only under coarse soil textures, low K indices and/or excessive leaching rainfall.
- Taxon
- Nicotiana tabacumNicotiana tabacume2
- Treatment
- early broadcast applications of K 2 Oe5
- Outcome
- be of concerne5
- Qualifier
- coarse soil textures, low K indices, and/or excessive leaching rainfalle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nicotiana tabacum L.”
e5“It is likely that early broadcast applications of K 2 O with current rate recommendations would only be of concern with combinations of conditions that included coarse soil textures, low K indices, and/or excessive leaching rainfall”
The same questions in other papers
potassium · quality: general · Nicotiana tabacum (tobacco)Positive and negative results
2 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 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.