\'Jin-kai 2\' was used to study the effects of six kinds of planting densities on agronomic traits, filling characteristics, photosynthetic and yield characteristics of maize with whole covering on double ridges and planting in catchment furrows , which can provide high-yielding cultivation theory of maize with whole covering on double ridges and planting in catchment furrows .

The mechanization technology of full plastic-film mulching on double furrow is the application of a kind of combined machine which integrates with the ridging,shaping,fertilizing,film mulching,covering soil,pressing plastic film.

The technique of whole plastic-film mulching in corn planting with double ridges and furrows on dryland before sowing has been failed to conserve sufficient soil moisture and use the autumn rain in the next spring.

Study on corn no-till planting mode of double ridge mulching "one film used for two years" on dryland;