A	Aggressivity
ATER	Area–time equivalent ratio
AYL	Actual yield loss
C	Mixtures of crimson clover and red clover 50:50
Cb	Competitive balance index
CR	Competitive ratio
DMY	Dry matter yield
DMYM	Dry matter yield of the whole aboveground biomass of maize
GYM	Dry matter grain yield of maize
IR	Italian ryegrass
KDMY	Potassium content in dry matter grain yield of maize
LEC	Land equivalent coefficient
LMERs	Linear mixed-effects models
LSAV	Land saved
LUE	Land-use efficiency
N	Nitrogen
NDMY	Nitrogen content in dry matter grain yield of maize
NMS	Nitrogen content in maize stover;
KMS	Potassium content in maize stover
PDMY	Phosphorus content in dry matter grain yield of maize
PMS	Phosphorus content in maize stover
PYD	Percentage yield difference
RCC	Relative crowding coefficient
RYT	Relative yield total
SPI	System productivity index
TKC	Total potassium content in the whole aboveground dry matter of maize
TNC	Total nitrogen content in the whole aboveground dry matter of maize
TPC	Total phosphorus content in the whole aboveground dry matter of maize
WCCs	Winter catch crops