Dataset Information

The N-P-K soil nutrient balance of Portuguese cropland in the 1950s: The transition from organic to chemical fertilization.

ABSTRACT: Agricultural nutrient balances have been receiving increasing attention in both historical and nutrient management research. The main objectives of this study were to further develop balance methodologies and to carry out a comprehensive assessment of the functioning and nutrient cycling of 1950s agroecosystems in Portugal. Additionally, the main implications for the history of agriculture in Portugal were discussed from the standpoint of soil fertility. We used a mass balance approach that comprises virtually all nitrogen (N), phosphorus (P) and potassium (K) inputs and outputs from cropland topsoil for average conditions in the period 1951-56. We found a consistent deficit in N, both for nationwide (-2.1?kg.ha^-1.yr^-1) and arable crops (-1.6?kg.ha^-1.yr^-1) estimates, that was rectified in the turn to the 1960 decade. P and K were, in contrast, accumulating in the soil (4.2-4.6?kg.ha^-1.yr^-1 and 1.0-3.0?kg.ha^-1.yr^-1, respectively). We observed that the 1950s is the very moment of inflection from an agriculture fertilized predominantly through reused N in biomass (livestock excretions plus marine, plant and human waste sources) to one where chemical fertilizers prevailed. It is suggested that N deficiency played an important role in this transition.

SUBMITTER: Carmo M

PROVIDER: S-EPMC5556002 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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The N-P-K soil nutrient balance of Portuguese cropland in the 1950s: The transition from organic to chemical fertilization.

Carmo Miguel M García-Ruiz Roberto R Ferreira Maria Isabel MI Domingos Tiago T

Scientific reports 20170814 1

Agricultural nutrient balances have been receiving increasing attention in both historical and nutrient management research. The main objectives of this study were to further develop balance methodologies and to carry out a comprehensive assessment of the functioning and nutrient cycling of 1950s agroecosystems in Portugal. Additionally, the main implications for the history of agriculture in Portugal were discussed from the standpoint of soil fertility. We used a mass balance approach that comp ...[more]

PMID: 28808244

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Dataset Information

The N-P-K soil nutrient balance of Portuguese cropland in the 1950s: The transition from organic to chemical fertilization.

Publications

The N-P-K soil nutrient balance of Portuguese cropland in the 1950s: The transition from organic to chemical fertilization.

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