Using the panchromatic wave band of high spatial resolution remote sensing image——QuickBird as the data source, the crown of pure Populus simonii×P.

Using the panchromatic wave band of high spatial resolution remote sensing image-QuickBird as the data source, the crown of plantation White Bark Pine (Pinus bungeana) with relative high crown closure was accurately estimated by applying the semivariogram theory of spatial statistics.

Studies on relationship between individual yield and crown with soil nutrition by stepwise regression and path analysis showed that 4 nutritional factors such as organic matters, hydrolyzable nitrogen, available phosphorus and available potassium had evident and significant relations with individual yield and crown, especially available phosphorus.

Research On the Correlation Between Crown Width and D.B.H of Pinus sylvestris var.in Yulin Desert Area;

The paper also proposes mathematical models for measuring Rosa roxburghii yield based on cluster number, cluster height, or crown width.

The traits measured were height,diameter at breast height(dbh),stem straightness,crown width,branch angle,branch diameter,branch number.

Using regression analysis method, the early crown diameter growth models of slash pine ( Pinus elliottii Engelm.

Detection mechanism for fruiter crown diameter;

Based on the results from the investigation of 100 trees in the plantation of Poplar Zhonglin-46 ,the paper gives a description on the relationship between crown size and tree diameter at breast height.