[County land cover maps]

Mode of access: Internet.

Tuberculose bovine. Extrait du rapport présenté au ministre de d'agriculture [!]

Issued also in Spanish and English.

A graphic summary of American agriculture based largely on the census /

Includes index.

The slotted-templet method for controlling maps made from aerial photographs /

Contribution from Soil Conservation Service.

Recensement agricole national l'élevage et l'agriculture en 1908 ...

Also issued in Spanish and English.

Alabama as it is: or, The immigrant's and capitalist's guide book to Alabama. Furnishing the most accurate and detailed information concerning the varied elements of wealth in Alabama, whether of mine, field or forest, together with carefully prepared maps and charts illustrative of the numerous advantages possessed by the state.

Published by the state Department of agriculture.

Agricultural maps in the National Archives of the United States, ca. 1860-1930 /

Mode of access: Internet.

Economic indicator maps for rural development in the Pacific West /

"January 1996."

Economic indicator maps for rural development in the interior West /

"January 1996."

Economic indicator maps for rural development in the East /

"January 1996."

The impact on agriculture of the drawdown of shallow watertables

The promoters of the large groundwater developments implemented in the 1970's paid little attention to the effects of pumping on soil moisture. A field study, conducted in 1979 in the Tern Area of the Shropshire Groundwater Scheme, revealed that significant quantities of the available moisture could be removed from the root zone of vegetation when drawdown of shallow watertables occurred. Arguments to this effect, supported by the field study evidence, were successfully presented at the Shropshire Groundwater Scheme public inquiry. The aim of this study has been to expand the work which was undertaken in connection with the Shropshire Groundwater Scheme, and to develop a method whereby the effects of groundwater pumping on vegetation can be assessed, and hence the impacts minimised. Two concepts, the critical height and the soil sensitivity depth, formulated during the initial work are at the core of the Environmental Impact Assessment method whose development is described. A programme of laboratory experiments on soil columns is described, as is the derivation of relationships for determining critical heights and field capacity moisture profiles. These relationships are subsequently employed in evaluating the effects of groundwater drawdown. In employing the environmental assessment technique, digitised maps of relevant features of the Tern Area are combined to produce composite maps delineating the extent of the areas which are potentially sensitive to groundwater drawdown. A series of crop yield/moisture loss functions are then employed to estimate the impact of simulated pumping events on the agricultural community of the Tern Area. Finally, guidelines, based on experience gained through evaluation of the Tern Area case study, are presented for use in the design of soil moisture monitoring systems and in the siting of boreholes. In addition recommendations are made for development of the EIA technique, and further research needs are identified.

Half-degree gridded nitrogen and phosphorus fertilizer use for global agriculture production during 1900-2013

In addition to enhance agricultural productivity, synthetic nitrogen (N) and phosphorous (P) fertilizer application in croplands dramatically altered global nutrient budget, water quality, greenhouse gas balance, and their feedbacks to the climate system. However, due to the lack of geospatial fertilizer input data, current Earth system/land surface modeling studies have to ignore or use over-simplified data (e.g., static, spatially uniform fertilizer use) to characterize agricultural N and P input over decadal or century-long period. We therefore develop a global time-series gridded data of annual synthetic N and P fertilizer use rate in croplands, matched with HYDE 3,2 historical land use maps, at a resolution of 0.5º latitude by longitude during 1900-2013. Our data indicate N and P fertilizer use rates increased by approximately 8 times and 3 times, respectively, since the year 1961, when IFA (International Fertilizer Industry Association) and FAO (Food and Agricultural Organization) survey of country-level fertilizer input were available. Considering cropland expansion, increase of total fertilizer consumption amount is even larger. Hotspots of agricultural N fertilizer use shifted from the U.S. and Western Europe in the 1960s to East Asia in the early 21st century. P fertilizer input show the similar pattern with additional hotspot in Brazil. We find a global increase of fertilizer N/P ratio by 0.8 g N/g P per decade (p< 0.05) during 1961-2013, which may have important global implication of human impacts on agroecosystem functions in the long run. Our data can serve as one of critical input drivers for regional and global assessment on agricultural productivity, crop yield, agriculture-derived greenhouse gas balance, global nutrient budget, land-to-aquatic nutrient loss, and ecosystem feedback to the climate system.

Mapas ambientales : Tensiones en la comunicación de la preocupación ambiental en Argentina

Exploramos una serie de imágenes cartográficas que, producidas en dos contextos históricos diferentes, exponen una serie de tensiones en torno a la transformación social de la naturaleza en Argentina y a la comunicación de las problemáticas ambientales. Se trata de cinco mapas temáticos publicados en el Atlas Total de la República Argentina en la década de los años 1980 y dos mapas-afiche producidos en talleres de mapeo colectivo a fines de la primera década del siglo XXI. Analizamos el contexto de producción, circulación y la arquitectura visual de estas imágenes como una vía de entrada para identificar algunos de los cambios que se han dado en los significados y sentidos acerca de la apropiación, del uso y de la transformación de la naturaleza en los últimos treinta años.

Mapas ambientales : Tensiones en la comunicación de la preocupación ambiental en Argentina

Exploramos una serie de imágenes cartográficas que, producidas en dos contextos históricos diferentes, exponen una serie de tensiones en torno a la transformación social de la naturaleza en Argentina y a la comunicación de las problemáticas ambientales. Se trata de cinco mapas temáticos publicados en el Atlas Total de la República Argentina en la década de los años 1980 y dos mapas-afiche producidos en talleres de mapeo colectivo a fines de la primera década del siglo XXI. Analizamos el contexto de producción, circulación y la arquitectura visual de estas imágenes como una vía de entrada para identificar algunos de los cambios que se han dado en los significados y sentidos acerca de la apropiación, del uso y de la transformación de la naturaleza en los últimos treinta años.

La Ley de semillas en Argentina: la disputa por el control y el futuro de la agricultura

Desde la llegada de la revolución bioteconológica en la agricultura mundial, las corporaciones semilleras-agroquímicas han avanzado en el control del mercado internacional de alimentos, a partir de diversos mecanismos, entre ellos el de la legislación de derechos de propiedad intelectual. En América Latina, distintos gobiernos han procurado adecuar la legislación nacional a estas tendencias internacionales, con resultado dispar, ya que se ha generado una fuerte resistencia desde organizaciones populares. Argentina, un país de temprana inserción en el mercado internacional de alimentos y de rápida adopción de los derechos de obtentor, está atravesado hoy por una nueva fase de esta disputa, ante la posible sanción de una nueva Ley de Semillas, en la que empresa estadounidense Monsanto está involucrada. Este trabajo hace un repaso del panorama actual desde un punto de vista geográfico, prestando especial atención a las estrategias de las organizaciones que se oponen a la nueva legislación.