Results 31 to 40 of about 1,847,045 (311)

Potential and Actual Yields of Seed from Black Spruce Cones

open access: yesThe Forestry Chronicle, 1988
Black spruce (Picea mariana [Mill.] B.S P.) trees have semi-serotinous cones and disperse seed over a period of years, a fact that suggests possible difficulty in seed release. Reported seed yields per cone are variable, and operational extraction yields are low. It is hypothesized that this could be attributed partially to incomplete extraction.
V. F. Haavisto   +2 more
openaire   +1 more source

Location of colorectal cancer: colonoscopy versus surgery. Yield of colonoscopy in predicting actual location [PDF]

open access: yesEndoscopy International Open, 2015
Abstract Background and study aims Recent studies suggest that differences in biological characteristics and risk factors across cancer site within the colon and rectum may translate to differences in survival. It can be challenging at times to determine the precise anatomical location of a lesion with a luminal view during colonoscopy.
Juan Pablo Blum-Guzman   +1 more
openaire   +3 more sources

Comparison among nine alfalfa breeding schemes based on actual biomass yield gains

open access: yesCrop Science, 2021
AbstractThe definition of efficient selection methods for biomass yield of alfalfa and other open‐pollinated forage crops has lagged behind, despite its crucial importance for breeders. This study, performed in northern Italy, aimed to compare nine breeding schemes encompassing the evaluation of replicated clones and half‐sib (HS), first selfing ...
Paolo Annicchiarico, Luciano Pecetti
openaire   +1 more source

Spatialization of Actual Grain Crop Yield Coupled with Cultivation Systems and Multiple Factors: From Survey Data to Grid

open access: yesAgronomy, 2020
The spatialization of actual grain crop yield helps to understand the spatial heterogeneity of yield and support for the precise farming and targeted farmland management.
Jingxin Li, Hongqi Zhang, Erqi Xu
doaj   +1 more source

Potential for quantifying general environmental resilience of dairy cattle in sub-Saharan Africa using deviations in milk yield

open access: yesFrontiers in Genetics, 2023
Introduction: Genetic improvement of general resilience of dairy cattle is deemed as a part of the solution to low dairy productivity and poor cattle adaptability in sub-Saharan Africa (SSA).
Richard D. Oloo   +9 more
doaj   +1 more source

Unveiling the Actual Functions of Awns in Grasses: From Yield Potential to Quality Traits [PDF]

open access: yesInternational Journal of Molecular Sciences, 2020
Awns, which are either bristles or hair-like outgrowths of lemmas in the florets, are one of the typical morphological characteristics of grass species. These stiff structures contribute to grain dispersal and burial and fend off animal predators. However, their phenotypic and genetic associations with traits deciding potential yield and quality are ...
Fabrice Ntakirutimana, Wengang Xie
openaire   +2 more sources

Comparison of methods for estimating continuous distributions of relaxation times [PDF]

open access: yes, 2005
The nonparametric estimation of the distribution of relaxation times approach is not as frequently used in the analysis of dispersed response of dielectric or conductive materials as are other immittance data analysis methods based on parametric curve ...
Butkov E.   +4 more
core   +3 more sources

Forecasting of wheat yield in various agro-climatic regions of Bihar by using CERES-Wheat model

open access: yesJournal of Agrometeorology, 2017
Forecasting yield of crops is important for planners in taking tactical decisions for ensuring food availability. Crop simulation models are useful tool to forecast the crop yield.
P.K.SINGH   +8 more
doaj   +1 more source

Dryland maize yield potentials and constraints: A case study in western Kansas

open access: yesFood and Energy Security, 2022
Water‐limited environments account for half of the earth's land surface, and dryland agriculture acreage is projected to expand due to climate changes.
Shuang Sun   +6 more
doaj   +1 more source

Analysis of the Spatial-Temporal Distribution Characteristics of Climate and Its Impact on Winter Wheat Production in Shanxi Province, China, 1964–2018

open access: yesPlants
The possible influence of global climate changes on agricultural production is becoming increasingly significant, necessitating greater attention to improving agricultural production in response to temperature rises and precipitation variability.
Donglin Wang   +9 more
doaj   +1 more source

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