Eff orts to exclude disease organisms from farms growing irrigated lettuce and leafy vegetables on California’s central coast are confl icting with traditionally accepted strategies to protect surface water quality. To begin resolving this dilemma, over 100 offi cials, researchers, and industry representatives gathered in April 2007 to set research priorities that could lead to eff ective co-ma...

It is probable that ‘The Farm Beneath the Sand’ will come to stand for a revolution in archaeological investigation. The authors show that a core of soil from an open field can provide a narrative of grazing animals, human occupation and their departure, just using DNA and AMS dating. In this case the conventional archaeological remains were nearby, and the sequence obtained by the old methods ...

Despite remaining the most important type of animal production, pig production in Poland and Hungary declined after their accession to European Union (EU) 2004. This paper investigated evolution technical efficiency pork industry both countries. We applied stochastic frontier analysis, which takes into account heterogeneity environment functions countries—true random effects, a metafrontier mod...

Agricultural structures are quite heterogeneous across the European Union (EU), and it is likely that underlying technology also differs regions. In this article, we claim heterogeneity of agriculture EU affects process income creation (i.e. relative importance factors farm differ for different agricultural models). A panel farms representative 125 regions reporting to Farm Accountancy Data Net...

A growing number of studies have shown that adequate spatial access to healthy foods leads to increased fresh produce consumption and reduced risk of chronic diseases. Annual dynamics of spatial access to 1,539 vendors of fresh produce (including farmers markets and roadside farm stands) are analyzed in Massachusetts. Travel distance to the nearest fresh produce vendor was calculated for each c...

This chapter analyzes the technical efficiency of banana production among Ugandan smallholders by estimating a stochastic production frontier model with inefficiency effects. The empirical models are formulated within the overarching framework of the agricultural household specified in Chapter 2. The data design is also summarized in Chapter 2, although additional information about soil quality...

The practical implementation of the employment promotion effect digital economy is closely linked to rural laborers’ skills (DS). Therefore, this study uses Mprobit model empirically test impact DS on labor choices. results show that: (1) acquisition by force significantly increases rate off-farm and entrepreneurship but has no significant farm employment, with work having most positive online ...

intestinal stem cells (iscs) are a group of rare cells located in the intestinal crypts which are responsible for the maintenance of the intestinal homeostasis and intestinal regeneration following injury or inflammation. lineage tracing experiments in mice have proven that iscs can repopulate the entire intestinal crypt. it is noteworthy that in such experiments, only a subset of intestinal cr...

This note generalizes Chao's estimator of population size for closed capture-recapture studies if covariates are available. Chao's estimator was developed under unobserved heterogeneity in which case it represents a lower bound of the population size. If observed heterogeneity is available in form of covariates we show how this information can be used to reduce the bias of Chao's estimator. The...

The economic well-being of most U.S. farm households depends on income from both onfarm and off-farm activities. Consequently, for many farm households, economic decisions (including technology adoption and other production decisions) are likely to be shaped by the allocation of managerial time among such activities. While time allocation decisions are usually not measured directly, we observe ...