搜索结果: 1-15 共查到“农学 sampling”相关记录19条 . 查询时间(0.163 秒)
Evaluation of conditioned Latin hypercube sampling for soil mapping based on a machine learning method
Conditioned Latin hypercube sampling Soil mapping Representativeness Sample randomness
2024/1/12
Sampling design plays an important role in soil survey and soil mapping. Conditioned Latin hypercube sampling (cLHS) has been proven as an efficient sampling strategy and used widely in digital soil m...
Efficiency of sector sampling for estimating juniper forest attributes vs. fixed area plot
accuracy crown cover density precision plot shape
2018/3/6
Juniper forests grow in mountain areas and many difficulties are encountered in their sampling. Sector sampling as
an unbiased and cost-effective method was tested for the sampling of a 12.5-ha junip...
Estimating red deer abundance using the pellet-based distance sampling method
cervidae distance sampling deer density pellet group counting rural areas
2015/11/26
Many European agricultural landscapes have been abandoned facilitating the comeback of large ungulates. In Portugal, the increase in red deer numbers caused local conflicts with landowners reporting e...
Economic aspects of the LTPD single sampling inspection plans
acceptance sampling economic effi ciency
2015/7/28
Th e paper deals with the LTPD (Lot Tolerance Percent Defective) single sampling plans when the remainder of
rejected lots is inspected. Th ere are considered two types of the LTPD plans – for inspe...
Sampling factors causing variability in milk constituents in early lactation cows
milk composition somatic cell count
2015/5/25
This study was conducted to evaluate effects of breed, parity, sampling day, and sampling time on
somatic cell count (SCC) and milk lipid and protein profiles in intra-mammary infection-free early l...
Sampling factors causing variability in milk constituents in early lactation cows
milk composition somatic cell count breed parity sampling day sampling hour
2015/4/30
This study was conducted to evaluate effects of breed, parity, sampling day, and sampling time on somatic cell count (SCC) and milk lipid and protein profiles in intra-mammary infection-free early lac...
Efficiency of adaptive cluster sampling and traditional sampling for coastal mangrove in Hainan of China
adaptive cluster sampling Horvitz-Thompson estimator Hansen-Hurwitz estimator simple random sampling systematic sampling
2015/4/14
Based on two species of Coastal Mangrove in Hainan of China, Sonneratia Apetala Buch-Ham and Sonneratia caseoli, we estimated the density of the two species to evaluate the efficiency of adaptive clus...
Monte Carlo simulation and remote sensing applied to agricultural survey sampling strategy in Taita Hills, Kenya
Agricultural survey Taita Hills Monte Carlo simulation remote sensing
2011/1/11
Remote sensing and Geographical Information Systems (GIS) are important tools used for assisting agricultural surveys. Such tools can be used to stratify the population samples in a study area, optimi...
A Basic Study on Field Experiment and Investigation Methods in Rice Plant:III. Precision of some sampling methods in sample survey of quantitative characters
Coefficient of variation Field experiment Quantitative character Rice plant Sampling method
2009/8/5
In sample survey on field experiment, samples have to be sampled at random in principle, but samples are often taken systematically due to restriction of time, labor and plot area. In order to get inf...
Power Core-sampling Method for Tea Root System Analysis
Core-sampling method Root system analysis Tea plants
2009/7/23
Power Core-sampling Method for Tea Root System Analysis.
Optimum Leaf Sampling to Evaluate Leaf Shape in Pears (Pyrus sp.)
Pears Leaf Sampling Leaf Shape
2009/7/13
Leaf shape was compared among leaf positions on the spur and the vegetative shoot, between trees of different ages and in different sampling seasons. For optimum leaf sampling, young trees should be a...
Linking ecologically based productivity information to timber supply analysis units using site series sampling
allowable annual cut analysis units ecological site series long-term harvesting level site index
2009/2/5
Timber supply analyses are used to estimate the possible harvest level of timber volume over the long term. Site index is one of the inputs of these analyses. When site index is underestimated, as is ...
Sampling Sunn Pest（Eurygaster integriceps Puton）in Overwintering Sites in Northern Syria
Sunn Pest Eurygaster integriceps sampling overwintering sites
2009/1/13
Sampling statistics for development of a sampling plan for adult Sunn Pest, Eurygaster integriceps Puton, in their overwintering habitat were generated based on numbers of live and total adults in 1 t...
Striking a balance：Safe sampling of partial stem cross-sections in British Columbia
cambial scars fire history partial sections safety criteria sampling procedures wildlife trees
2009/1/9
Dating cambial injury on a tree is an important objective of ecological research that determines the timing of disturbances such as fire, insect outbreaks, tree falls, or human modification of trees. ...
Influence of soil sampling for precision fertilizing
soil sampling methods differential global positioning system nutrient maps precision farming
2010/1/18
Influence of soil sampling for precision fertilizing.