Effects of Fertilisation Using Organic Waste Products with Mineral Complementation on Sugarcane Yields and Soil Properties in a 4 Year Field Experiment

Sugarcane cultivation is suitable for the exploitation of organic waste products. However, minimum complementary mineral input is necessary for optimal fertilisation. Control mineral fertilisation treatments with mulch (MCM) or without mulch (MC) were compared with two organic waste treatments, a pig slurry with mulch (PSM) and without mulch (PS), and a sugarcane vinasse with mulch (SVM) and without mulch (SV) on a Nitisol in French Reunion Island. The sugarcane yields obtained with the different treatments differed each year. However, no trend was observed and no significant and recurrent effect of the presence of mulch or of the different treatments was identified over the course of the 4 year experiment. Soil pHw and pH KCl measured in the different treatments increased from year 3 in with the treatments including organic waste products (PS, PSM, SV and SVM) but remained constant with the treatments including only mineral fertilisation (MC and MCM). With the exception of PS and PSM, which were significantly higher in year 4, soil organic carbon content was not modified by the treatments. Soil cation exchange capacity increased only slightly with the PS and PSM treatments from year 3 on. The differences in yields and soil properties can be explained by the nature of the organic waste products, the accumulation of nutrients after several applications, and the specific characteristics of the sugarcane crop. The improvement in soil properties from the third year on was not reflected in the yield of sugarcane because it was too weak, and the crop explores a much larger volume of soil.

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Effects of De-inking Sludge on soil Properties and Corn Growth

HortScience ◽

10.21273/hortsci.30.4.894c ◽

1995 ◽

Vol 30 (4) ◽

pp. 894C-894

Author(s):

Mohamed Badrane Erhioui ◽

A. Karam ◽

S. Yelle

Keyword(s):

Soil Properties ◽

Agricultural Soils ◽

C:N Ratio ◽

Chemical Properties ◽

Organic Soil ◽

Exchange Capacity ◽

Limiting Factor ◽

Organic Carbon Content ◽

Application Rates ◽

N Rates

The large amount of organic carbon content present in de-inking residues makes them attractive for use in agricultural soils as an organic soil amendment. Greenhouse bioessays were undertaken to evaluate the agronomic value of de-inking sludge (DS). It was incorporated in a sandy soil to study the effects of different rates of de-inking residue amendments and N fertilizer combinations on soil properties and growth of corn. Particular attention was given to trace element concentrations. In a split factorial design, three variables were investigated: harvest time (after 20, 40, and 60 days), application rates of DS (0, 35, 70, and 105 t·ha–1), and four N rates (0, 140, 280, and 420 kg·ha–1). Chemical analyses of the fresh residues did not indicate the presence of heavy metals at levels potentially toxic to the environment. Soil chemical properties were clearly improved following the incorporation of DS. For example, adding different amounts of DS had a significant impact on the pH, the cation exchange capacity, and soil moisture. In addition, salinity was not affected with DS application. Seed germination was high in all the treatments and was not significantly influenced by DS application. Moreover, results on vegetative growth indicated a good relationship between the C:N ratio and biomass production. The DS combined with supplemental fertilizer seems to have a positive effect on plant growth. Overall, these results suggest that the limiting factor in de-inking paper sludge valorization is the amount of N available to the plant. Also, no other toxic products were found that could be harmful to the environment.

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SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty

SOIL ◽

10.5194/soil-7-217-2021 ◽

2021 ◽

Vol 7 (1) ◽

pp. 217-240

Author(s):

Laura Poggio ◽

Luis M. de Sousa ◽

Niels H. Batjes ◽

Gerard B. M. Heuvelink ◽

Bas Kempen ◽

...

Keyword(s):

Soil Properties ◽

State Of The Art ◽

Qualitative Evaluation ◽

Global Scale ◽

Exchange Capacity ◽

Spatial Uncertainty ◽

Organic Carbon Content ◽

M Cell ◽

Global Environmental ◽

Version 2.0

Abstract. SoilGrids produces maps of soil properties for the entire globe at medium spatial resolution (250 m cell size) using state-of-the-art machine learning methods to generate the necessary models. It takes as inputs soil observations from about 240 000 locations worldwide and over 400 global environmental covariates describing vegetation, terrain morphology, climate, geology and hydrology. The aim of this work was the production of global maps of soil properties, with cross-validation, hyper-parameter selection and quantification of spatially explicit uncertainty, as implemented in the SoilGrids version 2.0 product incorporating state-of-the-art practices and adapting them for global digital soil mapping with legacy data. The paper presents the evaluation of the global predictions produced for soil organic carbon content, total nitrogen, coarse fragments, pH (water), cation exchange capacity, bulk density and texture fractions at six standard depths (up to 200 cm). The quantitative evaluation showed metrics in line with previous global, continental and large-region studies. The qualitative evaluation showed that coarse-scale patterns are well reproduced. The spatial uncertainty at global scale highlighted the need for more soil observations, especially in high-latitude regions.

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Phytoavailability of Cd, Cr, Cu, Hg, Mn, Mo, Ni, Pb, Tl and Zn in Arable Crop Systems Amended for 13 to 15 Years with Organic Waste Products

Agronomy ◽

10.3390/agronomy11040664 ◽

2021 ◽

Vol 11 (4) ◽

pp. 664

Author(s):

Aurélia Marcelline Michaud ◽

Valérie Sappin-Didier ◽

Philippe Cambier ◽

Christophe Nguyen ◽

Noémie Janot ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Carbon Content ◽

Organic Waste ◽

Field Experiments ◽

Chemical Properties ◽

Growth Stages ◽

Organic Carbon Content ◽

Waste Products ◽

Soil Organic Carbon Content

Repeated applications of organic waste products (OWP) are a source of trace elements (TE) inputs to agricultural topsoils. The present study aimed at (i) assessing the effects of repeated OWP inputs on the chemical properties of topsoils in two long-term field experiments (13 and 15 years; calcareous and non-calcareous soils), (ii) evaluating TE phytoavailability and their transfer to grain (winter wheat and maize) and (iii) identifying the underlying factors causing alterations of TE phytoavailability. In both field experiments, receiving compliant or slightly high doses of OWP in compliance with regulations, OWP and soil physicochemical properties and TE concentrations in soils and grains were determined. In situ phytoavailability of TE was assessed at two juvenile crop growth stages by analyzing TE concentrations in shoot plantlets. Depending on the OWP input amount, results showed that compared to the soil receiving no organic amendment, repeated OWP inputs significantly increased soil organic carbon content, pH, cation exchange capacity, total soil Cu, Mo and Zn concentration and the phytoavailability of Mo, while the phytoavailability of Cd, Mn, Ni and Tl was significantly reduced. No notable effect was observed for Cr, Cu, Hg, Pb and Zn phytoavailability. Statistical approaches suggested that due to the repeated OWP applications, increased soil organic carbon content and pH, were likely responsible for decreased TE phytoavailability (e.g., Cd).

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Effect of Different Manure Sources on Soil Chemical Properties, Performance and Yield of Maize on a Degraded Land

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2020/v32i1330358 ◽

2020 ◽

pp. 48-58

Author(s):

O. A. Denton ◽

I. O. Fademi ◽

K. S. Are ◽

A. O. Ojo ◽

O. D. Adeoyolanu

Keyword(s):

Soil Properties ◽

Block Design ◽

Poultry Manure ◽

Chemical Properties ◽

Exchange Capacity ◽

Soil Chemical Properties ◽

Control Treatment ◽

Organic Carbon Content ◽

Degraded Land ◽

Positive Effects

Application of manure for soil amendment plays important roles in reclaiming and improving soil properties of degraded soils. This study assessed the effects of composted and non-composted manures on a degraded soil under continuous maize production. The treatments applied consisted of composted manures in form of cassava based compost (CBM) and verticompost (VC) at the rate of 0, 30, 60 and 120 tons/ha, non-composted manure (NC) applied as poultry manure (PM), and an un-amended control plot. These treatments were laid out in a randomized complete block design replicated three times. Soil physical and chemical properties were determined for two consecutive seasons, with maize (SUWAN 1-SYR) planted as test crop. The CBM, VC and PM treatments increased the soil organic carbon content by 18.2, 24.1, and 22.3 % respectively. Corresponding increases observed in cation exchange capacity (CEC) were 13.6, 15.7, and 15.2 %. The comparison of the soil chemical properties measured indicated positive effects from the amendments on the soil properties in the order: CBM < PM < VC. The maize grain yield of cassava based fertilized plot consistently and significantly was higher than the other treatments in both cropping seasons. However, both the composted and non-composted manures favored improved maize growth and resulted in higher grain yields (4.62 – 6.03 t ha-1) than the un-amended control treatment (3.69 t ha-1). The study therefore showed that the incorporation of manures, whether composted or non-composted, is beneﬁcial to soils, improving one or more essential soil attributes thus reducing soil degradation.

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Assessment of the spatial variability of soil chemical properties along a transect using multifractal analysis

Cadernos do Laboratorio Xeolóxico de Laxe. Revista de Xeoloxía Galega e do Hercínico Peninsular ◽

10.17979/cadlaxe.2015.38.0.3580 ◽

2015 ◽

Vol 38 ◽

pp. 11-24

Author(s):

Jorge Dafonte Dafonte ◽

Montserrat Valcárcel Armesto ◽

Rosane Da Silva Dias ◽

Eva Vidal Vázquez ◽

Antonio Paz González

Keyword(s):

Spatial Variability ◽

Soil Properties ◽

Chemical Properties ◽

Field Measurements ◽

Structural Heterogeneity ◽

Exchange Capacity ◽

Soil Chemical Properties ◽

Organic Carbon Content ◽

Exchangeable Acidity ◽

Extractable P

The spatial variability of soil properties can be assessed through concepts of scale invariance, fractals and multifractals. The aim of this study was to characterize the scaling patterns and structural heterogeneity properties of general soil chemical properties along a short (i.e. 52 m large) transect. Field measurements were carried out at the experimental farm of CIAM located in Mabegondo, A Coruña, Spain. The studied transect was marked following land slope, and 66 soil samples were collected at the 0-20 cm depth every 0.8 m. The soil properties analyzed were: pH (H2O ), organic carbon content, exchangeable Ca, Mg and K, exchangeable acidity (H + Al), exchangeable bases (SB), cation exchange capacity (CEC), percent base saturation (V) and extractable P. The soil properties studied showed various degrees of multifractality. The spatial distribution of pH was characterized by quasi-monofractal behaviour; CEC, (H+Al) and OM, presented a relatively low degree of multifractality, and the other soil properties studied showed stronger degrees of multifractality, being the highest one for Olsen extractable P. In general, the scaling features of the properties studied implied a multifractal nature, where the low and high density regions scaled differently.

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SoilGrids 2.0: producing quality-assessed soil information for the globe

10.5194/soil-2020-65 ◽

2020 ◽

Author(s):

Luis M. de Sousa ◽

Laura Poggio ◽

Niels H. Batjes ◽

Gerard B. M. Heuvelink ◽

Bas Kempen ◽

...

Keyword(s):

Soil Properties ◽

State Of The Art ◽

Qualitative Evaluation ◽

Global Scale ◽

Exchange Capacity ◽

Spatial Uncertainty ◽

Organic Carbon Content ◽

Global Environmental ◽

Parameters Selection ◽

Version 2.0

Abstract. SoilGrids produces maps of soil properties for the entire globe at medium spatial resolution (250 metres cell size) using state-of-the-art machine learning methods to generate the necessary models. It takes as inputs soil observations from about 240 000 locations worldwide and over 400 global environmental covariates describing vegetation, terrain morphology, climate, geology and hydrology. The aim of this work was the production of quality-assessed global maps of soil properties, with cross-validation, hyper-parameters selection and quantification of spatially explicit uncertainty, as implemented in the SoilGrids version 2.0 product incorporating state of the art practices and adapting them for global digital soil mapping with legacy data. The paper presents the evaluation of the global predictions produced for soil organic carbon content, total nitrogen, coarse fragments, pH(water), cation exchange capacity, bulk density and texture fractions at six standard depths (up to 200 cm). The quantitative evaluation showed metrics in line with previous global, continental and large regions studies. The qualitative evaluation showed that coarse scale patterns are well reproduced. The spatial uncertainty at global scale highlighted the need for more soil observations, especially in high latitude regions.

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