KenSyn (version 0.3)

N2O: Meta-analysis dataset to estimate the response of N2O emissions to the applied N fertilizer rate.

Description

The data set consists of the data collected from litterature for a meta-analysis to estimate the response of N2O emissions (a greenhouse gas produced largely by agricultural activities, including nitrogen fertilization) to the applied N fertilizer rate. This dataset contains measurements of N2O emissions collected from 203 experimental studies (corresponding to different sites-years). In each study (Ref_num), several fertilizer doses (N_rate) were applied to different experimental plots and N2O emissions were measured (N2O, in kg ha-1 yr-1) on each. A total of 985 N2O emission data are available.

Usage

N2O

Format

a RangedData instance, 1 row per measurement. Type: , Ref_num: , Climate: , Texture_class: , Tex_act: , Carbon_content: , Nitrogen_content: , pH: , CEC: , Bulk_density: , Drainage: , Annual_Precipitation: , Mean_annual_temp: , crop_type: , Fertilizer_type: , Mode_of_application: , Timing_of_application: , N_rate: , N2O: , log_N2O: , duree_expe: , Method_N2O: , Freq_N2O

Examples

# NOT RUN {
summary(N2O)
# Examples of N2O emission measurements obtained on 9 experiments
# for different doses of N fertilizer applied.
par(mfrow=c(3,3), mar=c(4.1,4.1,1,1))
ListNum<-c(12,363,312,232,158,226,87,21,17)
null<-sapply(ListNum, function(Num){plot(N2O$N_rate[N2O$Ref_num==Num],N2O$N2O[N2O$Ref_num==Num],
xlab="Dose engrais N (kg/ha)", ylab="Emission de N2O (kg/ha/an)", pch=19, xlim=c(0,350))})
# }