1000 resultados para Agriculture
Resumo:
By reconstructing the nutrient balance of a Catalan v illage circa 1861-65 we examine the sustainability of organic agricultural sy stems in the northwest Mediterranean bioregion prior to the green rev olution and the question of whether the nutrients extracted f rom the soil were replenished. With a population density of 59 inhabitants per square km, similar to other northern European rural areas at that time, and a lower liv estock density per cropland unit, this v illage experienced a manure shortage. The gap was f illed by other labour-intensiv e way s of transf erring nutrients f rom uncultiv ated areas into the cropland. Key elements in this agricultural sy stem were v iney ards because they hav e f ew nutrient requirements, and woodland and scrublands as sources of relev ant amounts of nutrients collected in sev eral ways.
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1901 (A13).
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1893 (A5).
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1896 (A8).
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1897 (A9).
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1913 (A25).
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1890 (A2).
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1894 (A6).
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1908 (A20).
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1898 (A10).
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1895 (A7).
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1892 (A4).
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1891 (A3).
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1899 (A11).
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1909 (A21).
