搜索结果: 1-15 共查到“农学 economics”相关记录33条 . 查询时间(0.089 秒)
Spray and economics assessment of a UAV-based ultra-low-volume application in olive and citrus orchards
Agrochemical application UAV Sprayer Economic analysis
2024/1/19
Automation is a new frontier in specialty agriculture equipment. Specifically, unmanned aerial vehicles (UAV), machine vision and robotics will increasingly appear in sustainable agricultural systems....
2022年10月18日，数据与经济所郭建鑫研究员团队和密歇根州立大学金松青教授合作的研究论文“E-commerce forbid supply chain resilience during COVID-19: Evidence forbid agricultural input e-stores in China”在农经杂志Journal of Agricultural Economics（4....
Statement on the Nobel Prize for Economics 2020（图）
Wildfires changing forest communities interior Alaska
2020/10/16
As boreal forest wildfires increase in severity and frequency, new patterns of post-fire recovery are emerging. Research led by Jill Johnstone and colleagues at the U.S. National Science Foundati...
Integrating Economics in the Critical Period for Weed Control Concept in Corn
Benin corn–weed competition Germany Gompertz logistic mechanical weeding
2015/12/21
The effect of weed interference on corn yield and the critical period for weed control (CPWC) were determined in Germany and Benin. Treatments with weed control starting at different crop growth stage...
Interaction of selected production indicators of the economics of pork production
pig fattening pig potential economics cista revenue profitability relationships
2015/6/8
Estimates of the effects influencing the economics of pig production are of primary importance for breeders. For this purpose, costs, revenues and profitability were determined on the basis of individ...
Modelling Pasture-based Automatic Milking System Herds: The Impact of Large Herd on Milk Yield and Economics
Walking Distance Milking Interval Milk Yield Profit
2016/5/18
The aim of this modelling study was to investigate the effect of large herd size (and land areas) on walking distances and milking interval (MI), and their impact on milk yield and economic penalties ...
Economics of a hydraulic hammer for forest road construction in a mountainous area
hydraulic hammer rock disintegration cut slope productivity costs
2015/3/27
This research deals with productivity and cost of rock disintegration and side casting of materials with the use of a hydraulic hammer mounted on a PC 220 Komatsu crawler excavator, which is used on r...
Analysis of some dynamic series of forest production and trends of forest economics in the Czech Republic
economics of forest management dynamic (time) series trend
2015/3/6
Functions of wood production in forestry are historically determined by felling possibilities of forest resources. Revenues from timber sales create a financial space for silvicultural operations thus...
The economics of modern plum orchards in the Czech Republic
plum cultivars yields costs duration of pruning economics returns
2015/1/22
This paper deals with an evaluation of the economics in two commercial plum orchards which were established between 1993–1997 using dense tree-spacing and modern principles of orchard management. This...
Established in 1958 under the name of Nordic Forest Economics Seminar.The SSFE is one of the research network groups connected to the Nordic Forest Research Co-operation Committee (SNS).
Effects of Partial or Total Replacement of Maize with Alternative Feed Source on Digestibility, Growth Performance, Blood Metabolites and Economics in Limousin Crossbred Cattle
Growing Performance Nutrient Digestibility Blood Metabolites
2016/5/17
Increasing cost and scarcity of maize has stimulated the use of alternative feed sources (AFS) in the diets of cattle. In this study, we investigated the effects of partial or total replacement of mai...
《Patterns of varietal adoption and economics of rice production in Asia》（图）
Patterns of varietal adoption and economics of rice production in Asia H. Wang, S. Pandey O. Velarde B. Hardy
2013/11/20
One of the major projects being implemented by the International Rice Research Institute (IRRI), in partnership with the Chinese Academy of Agricultural Sciences (CAAS), concerns developing "Green Sup...
Economics of Plantain Production in Edo State Nigeria
Economics Plantain Production Edo State Nigeria
2010/12/16
Economics of Plantain Production in Edo State Nigeria。
Economics and environmental analysis of Mediterranean greenhouse crops
Toxicity nitrogen water gross margin risk labour
2011/1/13
The aim of this paper is to show that intensive agriculture, as greenhouse crops that produce a high level of environmental pollution, both by nitrogen fertilization as pesticides used, may be distrib...
Economics of scale and cost efficiency in small scale maize production in Mubi North Local Government in Adamawa State, Nigeria
Economics of scale stochastic frontier cost function
2011/1/12
This study presents economics of scale and cost efficiency of small scale production of maize in Mubi North Local Government in Adamawa state, Nigeria. A multi stage sampling techniques was used to se...