IRRI Flashcards
ratio of amount of water stored in the rootzone due to irrigation application to the amount of water delivered or applied to the area
Application Efficiency
ratio of amount of water delivered by a distribution system to the ratio of amount of water introduced into the distribution system
Conveyance efficiency
ratio of amount of water beneficially used to the amount of water delivered or applied to the area
Net Depth of Application
Dn= MAD(AWHC)drz
Dn=MAD(FC-PWP)drzAs
Gross depth of application
Dg=Dn/Ea
Irrigation Perion
DgA/Q
Irrigation Interval
Dn/ETcrop
LSR
LSR=(n-RMCxAs)drz/t
LPWR after LSR
LPWR= SnP+E+SW
LPWR for entire land preparation
LPWR= LSR+SnP+E+SW
Crop water requirement
CWR= Etcrop+P Etcrop = kcEto
FIR during land prep
LPWR-ER
FIR after transplanting
FIR=CWR-ER
1LPS/ha = 8.64 mm/day
FWR
FWR= FIR/Ea