Specifically, the effect of flood water application frequency on mineralization of organic N to inorganic forms should be investigated to assess the full N loading amount to groundwater under AgMAR. Although our study was exclusively focused on the impact of AgMAR on groundwater nitrate quality, we believe these findings to be applicable to other similar settings, …
Tag Archives: hydroponic
High levels of standing variation are one mechanism for rapid evolutionary change
Some gene families associated with plant detoxifcation and insecticide resistance have rapidly expanded , whereas others have contracted . Finally, gene families associated with immune defense exhibit expansions that may be linked to defense against pathogens and parasitoids that commonly attack exposed herbivores. A substantial proportion of the rapidly evolving gene families include proteins with transposable …
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Nathan McClintock of Cultivating the Commons was one of these founding members
This addendum called for the establishment of an Urban Agriculture Program to coordinate public efforts to encourage and develop urban gardens . The legislation also updated city goals for urban agriculture to facilitate incentive programs and resource distribution to urban gardens . In April 2013, the City Administrator’s Office initiated a task force to gather …
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The Hayes Valley Farm was a high profile urban garden located in downtown San Francisco
While squatting and the politicized aims of land reclamation remain in common, gardens have become an important part of oppositional spatial politics of radical urban movements not necessarily interested in long-term gardening. Today organized garden projects engaged in occupations may have momentary, short-term, or long-term aspirations of access to garden space. Guerilla gardening continues to …
Socially acceptable solutions help determine and limit the problem definition of obesity
While other scholars have traced these tendencies, like that of localism, to libertarian and neoliberal ideologies, this chapter emphasizes the autonomous Marxist and social anarchists framings of strategies towards justice, many originating out of broader global social movements. Alternative economic analyses are complicated and thickened with the increase in the importance of cultural and racial …
Historical movements have shaped a terrain of discourse and desire that stoke the fires of contemporary gardeners
Harvey claimed, “if the seeds of revolutionary transformation must be found in the present and if no society can launch upon a task of radical reorganization for which it is not at least partially prepared, then those internal contradictions provide raw material for growing an alternative” . To construct a utopian dialectics that engages concerns …
Matching eliminates 105 observations by dropping 86 treated observations and 19 untreated respondents
Our estimation strategy follows Angrist and Pischke , who advocate the use of two alternative approaches for dealing with omitted variable bias in panel data. The first employs a lagged dependent variable to account for the possibility that the subsidy was targeted based on pre-treatment trends in party support. The second uses a difference-in-difference model that …
The chief exceptions are medium and large commercial households in El Salvador
Wages fall by only 0.5% in El Salvador but nearly 3% in Guatemala, 8.5% in Nicaragua and 26% in Honduras. Because of these wage decreases and an imperfect transmission of output price changes across households, subsistence grain production increases by 1.8% and 2.1% in Guatemala and Nicaragua, respectively, while remaining almost unchanged in El Salvador …
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Benefits from elevated CO2 concentrations depend upon plant type and irrigation level
Consistent with scientific theory, empirical research suggests that warmer climates, such as those projected for the Southwest, will lead to more extreme precipitation intensity and frequency , particularly during the winter season . Since annual precipitation is projected to decline , more extreme events do not translate into higher total rainfall for a given year. Instead, …
The overwhelming implication of hybrid and genetically-modified seed is monoculture
Smallholders cannot compete. Under these conditions, they struggle to recoup the expenses of producing crops that require intensive agriculture. It is, therefore, vital that the rural poor continue to participate in self-sufficient agriculture, at least in part, given the precariousness of their ability to secure buyers at prices that will benefit them, even domestically. Risks …