Period of crop rotation
precipitation time series of crop growth period
feed crop of after crop
grain crop-cash crop-forage rotation
Carboniferous Period—Permian Period
Demand charge shift from the on-peak period to the off-peak period
middle_period and last_period state_mines
Paleogeng Period-Neogene Period
period shut-down (period trip)
period-to-period value changes
Spring and Autumn period and Warring States period
the Spring and Autumn Period and the Period of War
A REVIEW TO TREE-CROP INTERCROPPING IN CHINA
ability of salt-tolerance of crop
Above ground standing crop