Intensively managed plants cultivated for food or for esthetic purposes. Plant agriculture is divided traditionally into the fields of agronomy (herbaceous field crops, mainly grains, forages, oilseeds, and fiber crops), forestry (forest trees and products), and horticulture (garden crops, particularly fruits, vegetables, spices and herbs, and all plants grown for ornamental use). Most horticultural plants are utilized in the living state, with water essential to quality; thus most horticultural plants and products are highly perishable.