1000 resultados para Agriculture-extractive Residue
Resumo:
1868 (T8).
Resumo:
1867.
Resumo:
1864.
Resumo:
1862.
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.
Resumo:
1901 (A13).
Resumo:
1893 (A5).
Resumo:
1896 (A8).
Resumo:
1897 (A9).
Resumo:
1913 (A25).
Resumo:
1890 (A2).
Resumo:
1894 (A6).