Soil properties and crop yields after 21 years of direct drilling trials in southern Spain

Ordóñez‐Fernández, Rafaela; Fernández, Pedro González; Cervera, Juan Vicente Giráldez; Torres, Francisco Perea

doi:10.1016/j.still.2006.07.003

Cited by 74 publications

(23 citation statements)

References 15 publications

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“…Also, after 21 years of trials, Ordóñez‐Fernández et al . () observe an increase of 18 Mg ha −1 in the SOC content under no‐till, whereas CT did not show any increase in the Andalusian countryside. However, the differences between the tillage systems disappeared with depth.…”

Section: Resultssupporting

confidence: 61%

“…Ordóñez‐Fernández et al . () show significant differences in the SOC content in the surface layer (13 cm) with an increase of 23% in comparison to CT. The growing trend was maintained for a longer period than the 4 years observed by Rhoton et al .…”

Section: Resultsmentioning

confidence: 92%

“…Rhoton (2000) finds the increase of SOC in the top 2Á5-cm layer under no-till. Ordóñez-Fernández et al (2007) show significant differences in the SOC content in the surface layer (13 cm) with an increase of 23% in comparison to CT. The growing trend was maintained for a longer period than the 4 years observed by Rhoton et al (2002), as SOC was still improving after 20 years.…”

Section: Soil Propertiesmentioning

confidence: 85%

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Organic Farming Affects C and N in Soils Under Olive Groves in Mediterranean Areas

2013

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Under semiarid climatic conditions, intensive tillage increases soil organic matter losses, reduces soil quality, and contributes to climate change due to increased CO2 emissions. There is a need for an agricultural management increasing soil organic matter. This paper presents the organic carbon (OC) and nitrogen (N) stocks, C:N ratio and stratification ratios (SRs) of these properties for olive groves soils under long‐term organic farming (OF), and conventional tillage (CT) in Los Pedroches valley, southern Spain. The results show that OF increased C and N stocks. The soil organic carbon (SOC) stock was 73·6 Mg ha−1 in OF and 54·4 Mg ha−1 in CT; and the total nitrogen (TN) stock was 7·1 Mg ha−1 and 5·8 Mg ha−1 for OF and CT, respectively. In the surface horizon (A: 0–16·9 cm in OF and Ap: 0–21·8 cm in CT) and Bw horizon (16·9–49·6 cm in OF and 21·8–56 cm in CT), SOC and TN concentrations and C:N ratios were higher in OF than in CT. Soil properties stratification in depth, expressed as a ratio, indicates the soil quality under different soil management systems. The SR of SOC ranged from 2·2 to 3·1 in OF and from 2·1 to 2·2 in CT. However, only SR2 (defined by Ap‐A/C) showed significant differences between CT and OF. The SR of TN showed similar trends to that of the SR of SOC. Organic farming contributes to a better soil quality and to increased carbon sequestration. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 92%

Section: Soil Propertiesmentioning

confidence: 85%

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Organic Farming Affects C and N in Soils Under Olive Groves in Mediterranean Areas

2013

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“…More detailed information about the experimental site and the soil properties is available elsewhere (Fernández, Fernández, Cervera, & Torres, 2007;Melero et al, 2009).…”

Section: Experimental Site and Soilmentioning

confidence: 99%

Relationship of soil fertility to biochemical properties under agricultural practices aimed at controlling land degradation

Santiago¹,

Recena

Perea-Torres

et al. 2019

Land Degrad Dev

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Conservation agriculture (CA) is an essential strategy to avoid agricultural land degradation. It affects nutrient availability to plants and soil biological activity. However, an integral view of the effects of CA on soil fertility and biological indicators has been rarely described. Here, we examined the long‐term effects of no‐till and residue mulching on chemical properties, biological functionality indicators (enzyme activity), and nutrient availability indices of soil, and also their potential relationships, in order to provide a comprehensive view of the effects of CA on soil quality improvement. To this end, we assessed the effects after 27 years of conventional tillage (CT) and no‐tillage (NT) on a vertisol. NT increased Fe and Mn bound to organic matter when compared with CT. P and K availability in the soil surface was greater under NT than under CT by effect of more marked fertilizer stratification, and in the case of P by a decreased precipitation rate of Ca phosphates ascribed to an increased soil organic matter (SOM). The availability indices for Fe, Mn, Cu, P, and B were correlated with some enzyme activities. Our results reveal a relationship of soil biological functionality indicators, which were higher under CA, to nutrient availability to plants. This was explained at least in part by changes in soil properties, in particular an increased SOM, affecting both biological properties and nutrient availability. Thus, enzyme activities can be considered effective indicators of change in soil fertility, that is, nutrient availability to plants, a crucial factor for soil quality and functioning.

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“…However, inadequate tillage practices accentuate erosion, leading to the degradation of soils. The different types of conservation tillage and notillage significantly reduce soil erosion in comparison with conventional intensive tillage (Go´mez et al 1999, Francia-Martı´nez et al 2006, Milgroom et al 2007, Ordo´n˜ez-Ferna´ndez et al 2007). Moreover, minimum or no-tillage reduces soil carbon emissions (Montanaro et al 2010).…”

Section: Introductionmentioning

confidence: 99%

The diffusion process of no-tillage with herbicides application in Southern Spain's olive groves

Franco

Calatrava

2012

Journal of Environmental Planning and Management

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This paper analyses the processes of both the adoption and diffusion of no-tillage and of the type of application of herbicides among Southern Spain's olive farmers, using data from a farm survey. We estimate several probit models to identify some socio-economic and institutional factors related to the decision to use each practice of no-tillage on a regular basis and several diffusion models to describe the spatial and temporal spread of no-tillage among farmers. Our results show that no-tillage is practised by 90% of surveyed farmers either with the localised (21%) or non-localised (69%) application of herbicides. The diffusion process of no-tillage has been very intense since the mid-1990s, and has been based on the interaction among farmers in the area of study rather than on external factors. Some characteristics related to the adoption of each practice are farm size, irrigation and the continuity of the farming activity by some relative.

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Soil properties and crop yields after 21 years of direct drilling trials in southern Spain

Cited by 74 publications

References 15 publications

Organic Farming Affects C and N in Soils Under Olive Groves in Mediterranean Areas

Organic Farming Affects C and N in Soils Under Olive Groves in Mediterranean Areas

Relationship of soil fertility to biochemical properties under agricultural practices aimed at controlling land degradation

The diffusion process of no-tillage with herbicides application in Southern Spain's olive groves

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