摘要：The ornamental horticulture and turfgrass industry’s contribution to the US economy has been growing at an impressive rate. The 1997 Census of Horticultural Specialties reports that in 1998 there were 23,758 firms nationwide involved in the production of floriculture products, nursery plants, unfinished plant and propagation materials, turfgrass, sod, sprigs or plugs, and other horticultural products. These firms had combined sales of $10.6 billion.1 The number of US businesses involved in the production of horticultural and turf products nearly doubled from 1970 (12,962) to 1998 and sales doubled from 1988 ($4.8 million) to 1998 alone.
