Prediction of Vegetable Supply in Henan Province Based on PSO-GM (1, N) Model

Table 1

Set of influencing factors for the first selection.

Factors influencing the first choice	Unit
Application amount of pesticide	10 thousand tons
Usage of plastic film	10 thousand tons
Plastic film coverage area	1 thousand hectares
Number of rural employees	10 thousand people
Investment in transportation, storage, and postal industry	100 million RMB
Highway mileage	10 thousand km
Tonnage of road truck	10 thousand tons