Model analysis of forage response to split applications of nitrogen. I. Plant tops

The extended logistic model was developed to relate crop production (dry matter and plant nutrient uptake) to applied nutrient. In this article the model is used to analyze the effect of split applications of applied nitrogen to Pensacola bahiagrass (Paspalum notatum Flügge) on a poorly drained soil...

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Bibliographic Details
Published in:Communications in soil science and plant analysis 2003-01, Vol.34 (11-12), p.1529-1537
Main Authors: Overman, A.R, Scholtz, R.V. III
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
application timing
Biological and medical sciences
crop yield
dry matter accumulation
fertilizer application
forage grasses
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
growth models
logit analysis
mathematical models
nitrogen
nitrogen content
Nitrogen fertilization
nitrogen fertilizers
Nitrogen, phosphorus, potassium fertilizations
nutrient uptake
Paspalum notatum
shoots
Soil-plant relationships. Soil fertility. Fertilization. Amendments
split application
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Summary:The extended logistic model was developed to relate crop production (dry matter and plant nutrient uptake) to applied nutrient. In this article the model is used to analyze the effect of split applications of applied nitrogen to Pensacola bahiagrass (Paspalum notatum Flügge) on a poorly drained soil. The model describes the response curves for seasonal dry matter yield (Y), seasonal plant N uptake (N u ), and plant N concentration (N c ) to applied nitrogen (N), as well as the phase relations (Y and N c vs. N u ). Detailed analysis showed no clear benefit for split vs. single applications. This agrees with findings with other crops on different soils. # Florida Agricultural Experiment Station Journal Series No. R-08814.
ISSN:0010-3624
1532-2416
DOI:10.1081/CSS-120021294