
https://smallfarms.cornell.edu/2016/07/crucifer-cover-crops-for-small-farms/
Scientific Name: Brassica rapa
Life Cycle: Cool Season Annual
Growth Habit: Upright
Preferred Soil pH: 5.3-6.8 Min.
Germination Temp.: 45F
Upright, cool-season annual or biennial in areas where winter-kill fails to reliably occur. Has broad leaves with prominent midribs.
For more region specific information, each cover crop species can be found in the cover crop decision tool by name.
Brassicas & mustards overview: Managing Cover Crops Profitably (SARE Handbook Series Book 9) by Andy Clark (2007, 3rd ed.)