Claim · model-written summary
Nitrogen fertilization increased grass crude protein concentration in 1997 from 5.3% to 6.3%.
- Taxon
- Rangelandt0
- Treatment
- N fertilizatione0
- Outcome
- Crude protein concentratione0
- Direction
- increasede0
- Value
- 6.3e0
- Comparator
- 5.3%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Verbatim
e0“Crude protein concentration was increased by N fertilization in 1997 (6.3 vs 5.3%, P < 0.05)”
t0“Rangeland Production”
Title
N and P Fertilization on Rangeland Production in Midwest Argentina
Juan C. Guevara; Carlos R. Stasi; Oscar R. Estevez; et al. Journal of Range Management 2000. doi:10.2307/4003752
Other claims from this paper (10)
- Intervention effect N plus P fertilization increased forage production only in 1998, from 980 to 1,390 kg ha-1.
- Observation The 1998 N plus P application produced 16.5 kg forage per kg N applied.
- Intervention effect Nitrogen plus phosphorus increased grass crude protein concentration in 1998 from 5.7% to 6.8%.
- Intervention effect Nitrogen and phosphorus application increased seasonal rain-use efficiency when rainfall exceeded 300 mm.
- Observation In 1998 grass production per kg N applied increased by 18.4 kg with P.
- Observation In 1998 grass production per kg N applied increased by 12.4 kg without P.
- Observation The rain–nutrient break-even point for primary production on sandy soils of central Mendoza is around 400 mm year-1.
- Observation The estimated meat value derived from nitrogen fertilization was below fertilizer cost.
- Observation A fivefold forage yield increase would be needed to cover fertilizer cost.
- Observation At current fertilizer and meat prices, fertilization was not profitable for cattle production.