搜索结果: 1-15 共查到“林学 performance”相关记录15条 . 查询时间(0.237 秒)
Aerodynamic Performance of Hex-Rotor UAV Considering the Horizontal Airflow
aerodynamic model dynamic model transition flight trim method transition strategy calculation case
2024/1/23
A vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV) can meet both VTOL and horizontal flight performance, but how to achieve a safe and stable transition is a research focus of this t...
Evaluation of a UAV-mounted consumer grade camera with different spectral modifications and two handheld spectral sensors for rapeseed growth monitoring: performance and influencing factors
Modified consumer grade camera Unmanned aerial vehicle (UAV) Field-based hyperspectral data GreenSeeker crop sensor Image quality Band combination
2024/1/19
The objective of this study was to evaluate the crop monitoring performance of a consumer-grade camera with non-modified and modified spectral ranges which are commonly used in low-altitude unmanned a...
Altering Plant Architecture to Improve Performance and Resistance
gene regulatory network hormones ideal plant architecture miRNAs stress resistance yield parameters
2023/12/18
High-stress resistance and yield are major goals in crop cultivation, which can be addressed by modifying plant architecture. Significant progress has been made in recent years to understand how plant...
Growth performance and resistance to ground late frosts of Fagus sylvatica L. plantation treated with a brassinosteroid compound
European beech brassinolide frost events vitality of trees forest plantations
2017/4/6
We measured the initial growth performance of a young plantation of European beech treated with a brassinosteroid compound prior to planting and compared it with a control treatment: we assessed heigh...
Application of the Economic Value Added index in the performance evaluation of forest enterprise
cost of capital net present value
2016/6/3
The paper aims at pointing to possibilities of using the Economic Value Added index in evaluating the forest enterprise performance. The given index ranks among the indices of fourth-generation evalua...
Influence of pulverized limestone and amphibolite mixture on the growth performance of Alnus incana (L.) Moench plantation on an acidified mountain site
Jizersk?hory Mts. chemical amelioration biological amelioration
2015/3/16
A young speckled alder (Alnus incana [L.] Moench) stand was planted on a tract clear-felled due to air pollution and located on a summit plateau of the Jizersk?hory Mts. (Central Europe, Czech Republi...
Orchard performance of new plum cultivars on two rootstocks in a trial at Holovousy in 1998–2003
plum cultivars tree vigour yields
2015/1/21
Thirteen plum cultivars on two rootstocks (Myrobalan and Wangenheim Prune seedlings) were studied in a trial established in the spring of 1998 at spacings 5 × 1.5 m. Trees were trained as spindles. &#...
China Bamboo Product Trade: Performance and Prospects
China Bamboo Product Trade Performance Prospects
2014/5/6
The Chinese bamboo sector has grown dramatically over the past twenty years, and in 2000 China? bamboo exports reached approximately US$ 300 million, with bamboo shoots accounting for approximately ha...
A study comparing the performance of bamboo mat corrugated board with other corrugated boards
bamboo mat other corrugated boards
2014/5/7
The physical-mechanical performances of four kinds of corrugated roofing boards (bamboo, plastic, asbestos and steel) have been determined in the paper. The performance of the bamboo mat corrugated bo...
Determination of performance evaluation criteria’s in forestry organization: A Turkish forest district case study
Performance evaluation performance evaluation criteria forest district
2011/1/12
Performance Evaluation has become a favoured topic in recent years. Particularly, there has been a remarkable augmentation of organizations using this kind of management agent for two decades.
Determination of Oxytetracycline in Elaeocarpus sylvestris var.ellipticus Leaf by High Performance Liquid Chromatography
Elaeocarpus yellows high performance liquid chromatography intra-leaf concentration oxytetracycline quantitative analysis
2009/8/27
To develop a method of quantitating oxytetracycline (OTC), which is being considered as a promising agent for the control of Elaeocarpus yellows, I measured OTC in the leaves by high performance liqui...
Growth performance of bamboo in tobacco-growing regions in South Nyanza, Kenya
Tobacco bamboo growth performance Kenya
2009/3/4
The study was carried out on 120 field experimentation sites where 2420 bamboo cuttings were planted under the same natural tobacco growing conditions in five different zones (that is, zone A = hillsi...
Improvement of wheel skidder tractive performance by tire inflation pressure and tire chains
wheel skidder tire inflation pressure tire chains tractive performance motion resistance
2009/2/7
The motion resistance ratio, gross traction ratio and net traction ratio of a wheel cable skidder were determined and mathematical models derived for three tire inflation pressure values with or wit...
Field performance of pine stock types：Two-year results of a trial on interior lodgepole pine seedlings grown in Styroblocks, Copperblocks, or AirBlocks
Field performance of pine stock types trial interior lodgepole pine seedlings Styroblocks Copperblocks AirBlocks
2009/2/6
Copper-treated Styrofoam containers and containers with side slits have been designed to modify the root systems of seedlings grown in hardwall containers. By chemical- or air-pruning major lateral ro...
Two-year field performance of lodgepole pine seedlings：Effects of container type, mycorrhizal fungal inoculants, and site preparation
container type Copperblock™ AirBlock™ Styroblock™ ectomycorrhizae inoculation lodgepole
2009/1/8
Interior lodgepole pine (Pinus contorta var. latifolia) seedlings were grown in Styroblocks™, Copperblocks™,
or AirBlocks™, and inoculated with Rhizopogon rubescens or Hebeloma long...
