Claim · model-written summary
In silt loam soil, NO3-N concentrations beneath the root zone were considerably lower than at 30 cm deep for all irrigation procedures.
- Taxon
- apple
Malus domesticae0 - Treatment
- irrigation procedurese6
- Outcome
- concentrations of NO 3- Ne6
- Direction
- lowere6
- Comparator
- at 30 cm deepe6
- Setting
- silt loam soile6
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high density apple plantings of either `Gala' or `Empire' apple”
e6“In the silt loam soil, considerably lower concentrations of NO 3- N were found beneath the root zone than at 30 cm deep for all of irrigation procedures”
Title
D. Neilsen; P. Parchomchuk; G.H. Neilsen; et al. Journal of the American Society for Horticultural Science 1998. doi:10.21273/jashs.123.4.706
Other claims from this paper (15)
- Intervention effect Weekly fertigation with daily drip irrigation kept soil solution nitrate-N higher over more of the growing season than a single broadcast application with sprinkler irrigation in apple orchards.
- Intervention effect Daily Ca(NO3)2 fertigation increased soil solution NO3-N concentrations with the onset of fertigation.
- Intervention effect Soil solution NO3-N concentrations decreased rapidly with the end of Ca(NO3)2 fertigation.
- Intervention effect Soil solution NO3-N concentrations remained relatively constant during the intervening period of daily Ca(NO3)2 fertigation.
- Association Soil solution NO3-N concentrations were directly proportional to the amount of N added.
- Association Soil solution NO3-N concentrations were directly proportional to the amount of irrigation water added.
- Intervention effect Daily fertigation with (NH4)2SO4 gave less control of root-zone NO3-N availability than Ca(NO3)2 fertigation in apple.
- Intervention effect Soil solution NO3-N concentrations at 30 cm beneath the emitter were similar to the average concentrations in the fertigating solution across irrigation management methods, except at the fixed rate on loamy sand.
- Observation NO3-N concentrations below the root zone (75 cm deep) were elevated in the loamy sand regardless of N application and irrigation methods.
- Association Tree growth in the loamy sand was less than in the silt loam soil.
- Intervention effect Tree growth was limited by low irrigation water application in 1992 and 1993.
- Intervention effect Tree growth was unaffected by NO3-N concentration in the root zone.
- Recommendation N inputs in apple could be minimized by adding N to maintain NO3-N concentrations of 75 μg·mL -1 or possibly less.
- Recommendation Nitrogen inputs in apple may be reduced if fertilizer N and irrigation water are retained within the root zone.
- Recommendation Coarse-textured soils under apple will require precise water additions and possibly soil amendments to improve water holding capacity.