The addition of biochar to agricultural soils has been shown to improve crop productivity and sequester carbon in soils over a millennial timeline. However, little formal research has assessed the logistics or economics of transitioning to a biochar economy. This paper examines the problem of biochar application to soil. Specifically, we look at two methods of application-broadcast-and-disk and...

Profit-maximizing land developers are hypothesized to configure subdivisions to minimize the effects of a conservation regulation on developed land values, subject to their expectations about the demand for developed building lots. This hypothesis allows development of a hedonic price model that takes account of production adjustments. The model is applied to the Maryland Forest Conservation Ac...

This article reports the results of an econometric evaluation of the effects of Plan Colombia, the largest US aid package ever received by a country in the western hemisphere. We assess how the aerial spraying of illegal crops affects both the size of the land cultivated with coca bushes as well as the dynamics of localized violence in the context of Colombia’s armed conflict. In particular, we...

The headwaters of the Amazon Basin harbor most of the world's last indigenous peoples who have limited contact with encroaching colonists. Knowledge of the geographic distribution of these isolated groups is essential to assist with the development of immediate protections for vulnerable indigenous settlements. We used remote sensing to document the locations of 28 isolated villages within the ...

Two on-farm commercial vegetable demonstrations were conducted in south-central Kentucky, along with three specialty melon observation plots in 2003. Grower/cooperators were located in Edmonson and Larue counties. The grower/cooperator in Edmonson County grew one acre of cantaloupes, marketed through Green River Produce Marketing Cooperative located in Horse Cave, Kentucky. In Larue County, the...

In Section 6.5 of the First Report of the Science Review, the Panel drew attention to a lack of detailed knowledge of the potential impacts on biodiversity following the introduction of GM herbicide tolerant (GMHT) crops. Studies that systematically compared the effects of GMHT and conventional management regimes were available, but usually confined to small-scale studies at research stations o...

Movement across the borders of the nation-state has always been uneven, but over the past few decades the unfettered movement of goods and images has been defended under the ideology of freedom and openness. At the same time, the movement of people, including refugees, has become increasingly administered and restricted in the name of ‘the national interest’. This article argues that Australia ...

When averaged across the three growing seasons of the study, regression analyses indicated that 25R47 had maximum yield at ~1,320,000 seeds/acre, close to the recommended rate of 1,400,000 seeds/acre (Table 1). In contrast, 25R62 had a maximum yield at ~ 1,030,000 seeds/acre, about 400,000 seeds/acre less than the current recommended rate (Table 1). Furthermore, this variety did not respond to ...

BACKGROUND The majority of human brucellosis cases in Israel are caused by the ingestion of unpasteurized dairy foods produced from unlicensed family-owned flocks whose products are sold door-to-door at low prices. Exposure to infected farm animals is another major cause of infection. OBJECTIVES To determine, by examining recent incidence data and brucellosis control programs, whether a reduc...

OBJECTIVE To assess the significant differences in the nymphal development of the Rhodnius robustus Larrousse, 1927 under different temperatures and humidity conditions. This is a species found in the northern region of Brazil (states of Acre, Amazonas, and Pará), Colombia, Equator, Peru and Venezuela. METHODS Three groups of triatominae were kept under the following laboratory conditions: 33...