Cropping Systems in the Main LTRAS Experiment
 
Cropping System
Even Years
Odd Years
Rainfed wheat control (RWC)
unfertilized rainfed wheat
fallow
Rainfed wheat/legume (RWL)
unfertilized rainfed wheat
rainfed legume cover crop
Rainfed wheat/fallow (RWF)
fertilized rainfed wheat
fallow
Irrigated wheat control (IWC)
unfertilized irrigated wheat
fallow
Irrigated wheat/legume (IWL)
unfertilized irrigated wheat
rainfed legume cover crop
Irrigated wheat/fallow (IWF)
fertilized irrigated wheat
fallow
Conventional wheat/tomato (CWT)
fertilized irrigated wheat
fertilized irrigated tomato
Conventional corn/tomato (CCT)
fertilized irrigated corn
fertilized irrigated tomato
Legume/corn/tomato (LCT)
winter legume then irrigated corn
fertilized irrigated tomato
Organic corn/tomato (OCT)
winter legume then irrigated corn
with compost and no pesticides 
winter legume then irrigated tomato
with compost and no pesticides 

There are 6 one-acre plots per system, 3 for each of the two phases.  For example, there are also 3 plots in the RWC system that are fallow in even years and planted to wheat in odd years.