Claim · model-written summary
At high nitrogen rate in no-till, plants near the diagonal band tended to be smaller and lower yielding.
- Treatment
- higher N rate (202 kg N ha-1)e0
- Outcome
- individual plant size and yieldse0
- Direction
- lowere0
- Qualifier
- no-till systeme0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a similar trend for lower individual plant size and yields close to the diagonal NH3 band each year at the higher N rate (202 kg N ha-1) in the no-till system”
t0“Maize”
Title
Péter Kovács Purdue e-Pubs (Purdue University System) 2013
Other claims from this paper (19)
- Intervention effect Parallel ammonia placement did not generally improve plant growth uniformity relative to diagonal placement.
- Intervention effect Parallel ammonia placement did not generally improve leaf SPAD uniformity relative to diagonal placement.
- Intervention effect Parallel ammonia placement did not generally improve final grain-weight uniformity relative to diagonal placement.
- Observation In 2011, plant-to-plant variability was present at emergence and persisted through growth.
- Observation In 2011, more barren plants occurred than in 2010 and 2012.
- Observation In 2011, variation in kernel number and per-plant grain weight exceeded 2010 and 2012.
- Intervention effect Conventional tillage generally lowered plant-to-plant variation.
- Intervention effect Conventional tillage produced consistently higher yields than no-till.
- Association Within-row distance from a diagonal ammonia band explained up to 5% of plant-to-plant morphophysiological variation.
- Association In 2011, grain weight per plant was lower near the diagonal ammonia band.
- Association Silk emergence timing, stem volume at V15 or R1, and stalk diameter at R3 were the most influential predictors of per-plant grain weight.
- Association Variation in emergence thermal units and plant spacing had almost zero impact on final yields.
- Intervention effect Parallel placement improved whole-season nitrogen uptake at 145 kg N ha-1 in no-till relative to diagonal placement.
- Intervention effect No-till lowered reproductive leaf SPAD and mature whole-plant N after diagonal ammonia application, while parallel application showed no tillage effect.
- Intervention effect Lowering pre-plant N rate from 202 to 145 kg N ha-1 lowered mature maize biomass and N accumulation under diagonal placement but not parallel placement.
- Intervention effect Maize grain yield and mature whole-plant N accumulation almost doubled with increasing N rates in 2010-2011.
- Observation Drought limited maize response to ammonia in 2012.
- Observation The highest grain yield occurred with side-dress 202 kg N ha-1 in 2010-2011 and pre-plant 202 kg N ha-1 in 2012.
- Observation Pre-plant 202 kg N ha-1 consistently gave the highest whole-plant N uptake.