Abstract
At present on the agricultural battlefront on the agricultural plains surrounding Beijing, there is debate about the question of which cropping system to adopt. One alternative is the system of interplanting and relaying three crops [with three plantings and three harvests total]. The other system is two monoculture plantings in sequence [with two plantings and two harvests]. There are three focal points of the argument: (1) How can the interplanting and relay cropping system be evaluated?
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