soilassessment (version 0.3.0)

LGPSuit: A function for assessing Length of Growing Period (LGP) suitability requirements for certain crops and trees

Description

This function determines the suitability classes for length of growing period (LGP) requirements for selected agricultural crops and forest trees

Usage

LGPSuit(value, crop)

Value

The output is LGP suitability class for the crop. The output is an integer for suitability class: 1- highly suitable; 2 - moderately suitable; 3 - marginally suitable; 4 - currently not suitable; 5 - not suitable

Arguments

value

Input length of growing period (LGP) in days.

crop

The crop of interest for which length of growing period (LGP) suitability class is sought

Author

Christian Thine Omuto

Details

The input value can be map or an integer value of LGP in days

References

Sys, C., Van Ranst, E., Debaveye, J. and Beerneaert, F.1993. Land evaluation: Part III: Crop requirements. Development Cooperation, Belgium.

Naidu, L.G.K., Ramamurthy, V., Challa O., Hegde, R. and Krishnan, P. 2006. Manual, Soil-site Suitability Criteria for Major Crops, National Bureau of Soil Survey and Land Use Planning, ICAR, Nagpur, India

FAO Crop Suitability Requirements: http://ecocrop.fao.org/ecocrop/srv/en/home

See Also

suitability, PHSuit, fertilitySuit

Examples

library(sp)
LGPSuit(138,"cotton")
newmap = data.frame(LGP = c(1:6,158,160,211),
                    lon = c(1,1,1,2,2,2,3,3,3),
                    lat = c(rep(c(0, 1.5, 3),3)))
coordinates(newmap) = ~lon+lat
gridded(newmap) = TRUE
newmap = as(newmap, "SpatialGridDataFrame")
newmap$LGPmillet=LGPSuit(newmap$LGP,"millet")
spplot(newmap["LGPmillet"], main="LGP suitability map for finger millet")