搜索结果: 1-15 共查到“农学 Estimates”相关记录20条 . 查询时间(0.046 秒)
Improving Estimates and Change Detection of Forest Above-Ground Biomass Using Statistical Methods
above-ground biomass remote sensing statistics modelling spatial modelling machine learning
2023/11/29
Forests store approximately as much carbon as is in the atmosphere, with potential to take in or release carbon rapidly based on growth, climate change and human disturbance. Above-ground biomass (AGB...
Variance components,heritability estimates,and breeding values for performance test traits in Old Kladruber horses
harness horse genetic parameters performance test genetic resource
2016/9/1
The Old Kladruber horse is an important Czech genetic resource. In the current study, two categories of traits were evaluated – the first, a numerical score for Type and Gender Expression and the seco...
Casein Supplementation Does Not Affect the Estimates of True Total Tract Digestibility of Phosphorus in Soybean Meal for Growing Pigs Determined by the Regression Method
Casein Phosphorus Pig Soybean Meal True Total Tract Digestibility
2016/11/10
Forty-eight barrows with an average initial body weight of 25.5±0.3 kg were assigned to 6 dietary treatments arranged in a 3×2 factorial of 3 graded levels of P at 1.42, 2.07, or 2.72 g/kg, and 2 leve...
Genetic parameter estimates for birth and weaning weights in Raeini goats
body weight growth heritability maternal effects goat
2015/6/8
The aim of the present study was to estimate variance components and genetic parameters for birth and weaning weights in Raeini goats. The data were collected from the Breeding Centre of Raeini (BCR) ...
Breeding value evaluation in Polish fur animals: Estimates of (co)variances due to direct and litter effects for fur coat and reproduction traits
arctic fox fur coat traits genetic parameters normal probability scale transformation reproductive traits
2015/6/2
5 540 records of the arctic fox fur coat and reproductive traits collected in 1983–1999 were studied. The analyzed traits were: body size (BS), colour type (CT), colour purity (CP), coat density (CD),...
Breeding value evaluation in Polish fur animals: Estimates of direct heritability and portion of litter variation of fur coat and reproduction traits
arctic fox fur coat heritability
2015/6/1
The study presents estimates of heritability for fur coat and reproduction traits in arctic and silver foxes kept on Polish farms. The estimates of variance components were calculated using the DFREML...
Improving RBS estimates − effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimates
randomized branch sampling multistage sampling unequal selection probabilities
2015/3/6
Randomized Branch Sampling (RBS) is a multistage sampling procedure using natural branching in order to select samples for the estimation of tree characteristics. The existing variants of the RBS meth...
Estimates of genetic variability in vegetable amaranth (A. tricolor) over different cuttings
A. tricolor foliage yield heritability genetic advance selection
2015/1/21
The present investigation was carried out to study different selection parameters for foliage yield and its important yield contributing traits in 29 strains of vegetable amaranth (A. tricolor). The d...
Trends and Projected Estimates of GHG Emissions from Indian Livestock in Comparisons with GHG Emissions from World and Developing Countries
Greenhouse Gas Methane Nitrous Oxide Livestock India Developing Countries
2016/5/16
This study presents trends and projected estimates of methane and nitrous oxide emissions from livestock of India vis-à-vis world and developing countries over the period 1961 to 2010 estimated based ...
Estimates of genetic parameters for yield and yield attributes in elite lines and popular cultivars of India’s pearl millet
PCV GCV heritability genetic advance
2011/1/13
Estimation of genetic parameters would be useful in developing appropriate selection strategies. Heritability is a measure of possible genetic advancement under selection. The research work pertaining...
Ecological descriptions of Pacific golden chanterelle (Cantharellus formosus) habitat and estimates of its extent in Haida Gwaii
biogeoclimatic ecosystem classification Cantharellus formosus commercial mushroom harvest non-timber forest products
2010/8/31
Ecologically based information on golden chanterelle (Cantharellus formosus) habitat is needed to guide decision making by forest managers. We described soils, plant communities, and stand characteris...
Cost efficiency estimates of maize production in Nepal: a case study of the Chitwan district
Ehime University Faculty of Agriculture
2014/3/3
This study was carried out to analyze the cost efficiency of maize production in the chitwan district, nepal
with a view to predict economic efficiencies using stochastic frontier cost function. The...
Making sense of site index estimates in British Columbia：A quick look at the big picture
site index estimates British Columbia big picture
2009/2/5
Site index remains the primary estimate of forest site productivity used throughout British Columbia and around the world. Forest managers often need a better understanding of how various site ind...
Estimates of Broad-Sense Heritability for Seed Yield and Yield Components of Grass Pea（Lathyrus sativus L.）
Grass pea heritability seed yield 1000-seed weight
2009/1/9
This study was carried out to estimate the broad-sense heritability for seed yield and some yield components of 15 grass pea (Lathyrus sativus L.) genotypes in 2000-2002 at Bursa, in the Marmara regio...
Using OAF1 estimates to rank areas for supplemental planting
OAF1 estimates rank areas supplemental planting
2009/1/8
Supplemental planting (planting trees into areas of low stocking within young stands)—also known as fill-planting, blanking, or beeting—is a common silviculture practice. This extension note describes...