《Winter cover crops in a vegetable cropping system: Impacts on nitrate leaching, soil water, crop yield, pests and management costs》

http://ucce.ucdavis.edu/files/filelibrary/5472/2 1426.pdf

《Impact of soil health management practices on soilborne pathogens, nematodes and root diseases of vegetable crops》

http://search.nal.usda.gov/bitstream/ 10 1 13/934/ 1/IND22068650.pdf