2.7.1 All deciduous trees shall be a minimum of 1-inch caliper, with a minimum height of 6 feet and a maximum height of 10 feet, unless otherwise specified. 2.7.2 All material shall be single-stemmed, No. 1 grade trees unless otherwise specified. 2.7.3 If balled and burlapped stock is used, trees shall be dug and balled with heavy-duty burlap and laced with twine and/or a wire basket package. The ball shall have sufficient moisture according to best nursery practices. If wire baskets are used to support the root ball, a “low profile” basket shall be used. 2.7.4 If container stock is used, the container class size shall conform to ANSI Z60.1 for container stock and shall have a well-established root system reaching the sides of the container to maintain a firm ball, but shall not have excessive root growth encircling the inside of the container. Further, a container tree’s root system must be developed to hold its soil together, firm, whole and moist when taken from the container. 2.7.5 Only vigorous, healthy plants with a well-developed fibrous root system with no encircling roots, a well-formed canopy with a strong, intact central leader, straight trunk and specific characteristics of the species shall be accepted. Trees shall be stout,show good twig growth for the past 3-5 years, normal twig development shall have 4 to 18 inches of growth per year characteristic to the species. Branches shall diverge from the main trunk with good U-shaped crotches. The bark shall be firm on the trunk with no indication that the trees have suffered from frost cracks, sun scald, lightning, mechanical injury, suckers or improper pruning. All trees shall be free from insects, insect damage, diseases and disease damage. Material found lacking in any ofthese characteristicsshall be rejected at time of delivery or during the quality control check
