Yield Gap and Front-Line Demonstration Indices

Yield gap between actual and potential yields. When an attainable yield (for example the yield of an improved-practice or front-line demonstration plot) is supplied, the gap is split into a technology gap and an extension gap and the technology index is given.

Usage

yield_gap_analysis(
  actual_yield,
  potential_yield,
  attainable_yield = NULL,
  verbose = TRUE
)

Arguments

actual_yield

Actual (farmers' practice) yield.

potential_yield

Potential yield of the crop or variety.

attainable_yield

Attainable or demonstration yield (optional).

verbose

Logical. If TRUE (default), prints the table.

Value

A data frame of class aridagri_yield_gap.

Details

Total gap = potential - actual; yield efficiency = 100 x actual / potential. With attainable yield (Samui et al., 2000): technology gap = potential - attainable; extension gap = attainable - actual; technology index = 100 x technology gap / potential; yield increase over farmers' practice = 100 x (attainable - actual) / actual.

References

Samui, S.K., Maitra, S., Roy, D.K., Mondal, A.K. and Saha, D. (2000). Evaluation of front line demonstration on groundnut (Arachis hypogaea L.). Journal of the Indian Society of Coastal Agricultural Research, 18(2), 180-183.

Author

Lalit Kumar Rolaniya, Ram Lal Jat, Monika Punia, Raja Ram Choudhary, Hemant Poonia

Examples

yield_gap_analysis(actual_yield = c(800, 950, 720), potential_yield = 1500)
#> 
#> ======================================================================
#>  YIELD GAP ANALYSIS
#> ======================================================================
#>  Mean yield gap = 676.7 (45.1% of potential)   Mean yield efficiency = 54.9%
#> 
#>  Actual_Yield Potential_Yield Yield_Gap Gap_Percent Yield_Efficiency
#>           800            1500       700        46.7             53.3
#>           950            1500       550        36.7             63.3
#>           720            1500       780        52.0             48.0
# Front-line demonstrations: farmers' practice vs demonstration plots
yield_gap_analysis(actual_yield = c(820, 760, 905),
                   potential_yield = 1500,
                   attainable_yield = c(1080, 1010, 1150))
#> 
#> ======================================================================
#>  YIELD GAP ANALYSIS
#> ======================================================================
#>  Mean yield gap = 671.7 (44.8% of potential)   Mean yield efficiency = 55.2%
#>  Mean technology gap = 420.0   Mean extension gap = 251.7   Mean technology index = 28.0%
#> 
#>  Actual_Yield Potential_Yield Yield_Gap Gap_Percent Yield_Efficiency
#>           820            1500       680        45.3             54.7
#>           760            1500       740        49.3             50.7
#>           905            1500       595        39.7             60.3
#>  Attainable_Yield Technology_Gap Extension_Gap Technology_Index
#>              1080            420           260             28.0
#>              1010            490           250             32.7
#>              1150            350           245             23.3
#>  Increase_over_Actual_pct
#>                      31.7
#>                      32.9
#>                      27.1