Woody-plant Seed Manual

60 days acid black locust California cleaned seed collected Commercial seed cones cost of commercial cultivated Date of earliest days at 41 deciduous dormancy Douglas-fir dried drupe eastern eastern white pine embryo endosperm epigeous epigeous fig erosion control Exterior view EXTRACTION fall FIGURE flowers Forestry Fruit ripening game food germination germination data germination tests Germinative capacity Germinative energy given in table Growth habit illus inch longitudinal section moist sand moisture content Natural range nigra Norway spruce Number NURSERY AND FIELD occidentalis ornamental ornamental planting peat Percent Percent pine seeds Pinus pretreated seeds purity samples sand flats sealed containers seed coat seed crops Seed dispersal seed per pound seedbed SEEDING HABITS.-The seedlings seeds per test shrub soaking soil soundness southern sowing sown species spring spruce storage stored stratification stratified seed sulfuric acid tion treatment U. S. Dept usually viability viburnum virginiana wildlife food winter