The Role of Organic Wastes in Enhancing Soil Organic Matter and Promoting Crops Growth in Vegetable Production

A Special Issue of Agriculture (ISSN 2077-0472) belonging to the section "Agricultural Soils".

Deadline for manuscript submissions: 20 September 2026 | Viewed by 1463

Editors


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Guest Editor
Institute of Agriculture and Horticulture, Faculty of Agricultural Sciences, University of Siedlce, Bolesława Prusa 14, 08-110 Siedlce, Poland
Interests: organic fertilizers; green manures; organic waste materials; vegetable production; yield quality; soil quality; organic horticulture; organic agriculture; biostimulants

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Guest Editor
Institute of Agriculture and Horticulture, Faculty of Agricultural Sciences, University of Siedlce, Bolesława Prusa 14, 08-110 Siedlce, Poland
Interests: soil quality; chemical composition of soil; soil organic matter; speciation of heavy metals; organic fertilizers; organic waste materials; plant nutrition; yield quality; environmental protection

Special Issue Information

Dear Colleagues,

Soil is one of the main factors influencing food production. The natural ability of soil to meet plant nutritional needs depends on its mechanical composition, physicochemical and biological properties, and also on fertilizer management. At the same time, soil is a readily degradable natural resource, and due to plant and animal production, it is of key value to humans. Long-term use of mineral fertilizers leads to soil contamination, reducing humus content and degrading structure and physicochemical properties.

One way to reduce the negative impact of intensive agriculture and horticulture on the environment is to fertilize soil with natural and organic fertilizers, as well as organic waste materials from sources such as agriculture and the food industry. Applying them at the appropriate doses and timing can improve soil health, increase soil organic matter, improve soil water retention and cation exchange, and promote soil biodiversity.

Organic waste materials can also be an excellent organic fertilizer in vegetable production, positively impacting plant growth and crop quality. Agricultural management of organic waste also aligns with the idea of ​​a circular economy and can be a response to the growing waste crisis, coupled with widespread soil degradation and the urgent need for sustainable agricultural and horticultural practices.

We invite you to submit original research, reviews, and recent developments on the role of organic waste materials in increasing soil organic matter and improving soil quality, as well as the use of waste materials in vegetable crops.

Prof. Dr. Robert Rosa
Prof. Dr. Krzysztof Pakuła
Guest Editors

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Keywords

  • soil organic matter
  • soil quality
  • organic waste materials
  • waste management
  • vegetable production
  • yield
  • crop quality
  • growth promotion
  • sustainable development

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Published Papers (1 paper)

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Research

24 pages, 1103 KB  
Article
Vermicomposting of Camel (Camelus dromedarius) Manure with Fly Ash and Microbial Inoculants: Effects on Nutrients and Heavy Metals
by Hupenyu A. Mupambwa, Elia N. M. Ruben, Nils H. Haneklaus, Bethold Handura, Veronica A. Howoses, Jamal Ait Brahim, Redouane Beniazza, Hynek Roubík, Wayne F. Truter, Elizabet M. van der Merwe and Hendrik Brink
Agriculture 2026, 16(6), 654; https://doi.org/10.3390/agriculture16060654 - 13 Mar 2026
Viewed by 1010
Abstract
This study evaluated the effects of fly ash (F) and effective microorganisms (EM) on nutrient dynamics and heavy metal transformations during vermicomposting of camel manure (CM). Four treatments (CM, CM + F, CM + EM, and CM + F + EM) were arranged [...] Read more.
This study evaluated the effects of fly ash (F) and effective microorganisms (EM) on nutrient dynamics and heavy metal transformations during vermicomposting of camel manure (CM). Four treatments (CM, CM + F, CM + EM, and CM + F + EM) were arranged in a completely randomized design and monitored over 12 weeks. Significant (p < 0.05) treatment and time interactions were observed for pH, NH4-N, Mn, Pb, and Mo. The addition of EM resulted in a greater decline in pH compared to other treatments. After 12 weeks, Olsen P increased from 300.62 to 398.71 mg/kg in CM + EM, while NH4-N increased markedly from 22.74 to 86.62 mg/kg. In contrast, NO3/NO2-N declined in EM-amended treatments but increased in the control and CM + F. Trace metal concentrations generally increased due to mass reduction during vermicomposting yet remained within internationally acceptable limits. Germination index (GI) values varied significantly among crops and treatments, ranging from phytotoxic to non-phytotoxic responses. Although CM + EM produced superior nutrient enrichment, several vegetables exhibited GI values below 50%, indicating potential phytotoxicity for sensitive crops. In case of established crops for which nutrient supply outweighs early phytotoxic concerns, CM + EM represents the most agronomically beneficial option. Future studies should explore blending CM + EM and CM + F with stabilizing amendments such as biochar to optimize nutrient availability while minimizing salinity and phytotoxic risks. Full article
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