This study tests the hypothesis that lakes in watersheds dominated by row-crop agriculture (e.g., maize or soybeans) have systematically higher N : P than lakes in watersheds with large tracts of pasturelands. Current biogeochemical models of eutrophication suggest that agricultural nitrogen and phosphorus fluxes lead to a systematic decline in the N : P of receiving waters. In contrast, differ...

With the rapid progress of information technology more and more people utilize high technology to boost the fast development of the national economy. Since the project of agricultural science and technology to farmer was put into practice by Ministry of Agriculture in 2005, 212 representative counties have been set, 200,000 typical households have been added, and 4 million peasants have enhance...

this paper aims to analyze tariff protection policies in the agricultural sector of developing countries. the agricultural tariff structure in developing countries is characterized by: i) high average tariffs, ii) the existence of tariff escalation, iii) dispersion of nominal tariffs across tariff lines, and iv) a wide gap between average nominal tariffs and import-weighted average tariffs. con...

_________________________________________________ James Oehmke is an Associate Professor in the Department of Agricultural Economics and L. H. Bailey Scholar at Michigan State University. This research was sponsored in part by the Michigan Agricultural Experiment Station. Research assistance was provided by Ben Chaffin. I would like to thank four anonymous referees for comments on an earlier ve...

We developed a single-equation decomposed negative binomial regression model (NBRM) of the U.S. farm sector to simultaneously evaluate structural changes in the U.S. agricultural sector and the strength of several economic forces that influenced the changes in farm structure during the 1960–96 period. We found all these forces reinforced economic incentives to increase the size and decrease the...

As a kind of advanced productive forces, the advantage and potential of E-commerce could not be ignored for upgrading the industrialization degree of agriculture, adjusting the agricultura structure, reducing the transaction cost of agricultural products and enlarging the market sale range and channels of agricultural products. This paper analyzes the present status and problems of application ...

The National Agricultural Biotechnology Information Center developed an access portal to search, visualize, and share agricultural genomics data with a focus on South Korean information and resources. The portal features an agricultural biotechnology database containing a wide range of omics data from public and proprietary sources. We collected 28.4 TB of data from 162 agricultural organisms, ...

Understanding the diversity and community structure of arbuscular mycorrhizal fungi (AMF) is important for potentially optimizing their role in mining phosphorus (P) in agricultural ecosystems. Here, we conduct a comprehensive study to investigate the vertical distribution of AMF in a calcareous field and their temporal structure in maize-roots with fertilizer P application over a three-year pe...