Heavy metal contamination, particularly copper (Cu) toxicity, poses a severe threat to global agricultural productivity and soil ecosystem stability. This study evaluated the effects of different doses (D0: control, D0.5: 0.5

Bu çalışmanın amacı, artan su stresi koşulları altında farklı piroliz sıcaklıklarında (350°C ve 550°C) üretilen çeltik kavuzu biyokömürünün marul (Lactuca sativa L.) bitkisinin verimi ve fizyolojik parametreleri ile toprak özellikleri üzerindeki etkilerinin araştırılmasıdır. Sera koşullarında, tesadüf parsellerinde faktöriyel deneme desenine göre kurulan çalışmada; üç farklı sulama rejimi (%50, %75 ve %100), iki farklı biyokömür tipi (B350 ve B550) ve üç farklı biyokömür dozu (%0, %1 ve %2) test edilmiştir. Elde edilen bulgular, artan sulama suyu seviyelerinin ve biyokömür dozlarının marulun taze ve kuru biyokütle verimi ile su kullanım randımanını istatistiksel olarak ileri düzeyde (p<0.01) artırdığını göstermektedir. Biyokömürün üretim sıcaklığının verim parametreleri üzerinde istatistiksel açıdan anlamlı bir ana etkisi bulunmamasına rağmen, %2 oranındaki biyokömür uygulaması kontrol grubuna kıyasla taze verimde %24, kuru verimde ise %30'luk bir artış sağlamıştır. Toprak özellikeri açısından değerlendirildiğinde, %2'lik biyokömür dozu toprağın değişebilir potasyum ve alınabilir fosfor konsantrasyonlarını sırasıyla %24 ve %18 oranında artırmıştır. Sonuç olarak bu çalışmada, çeltik kavuzu biyokömürünün üretim sıcaklığından bağımsız olarak %2 oranında toprağa uygulanmasının, kuraklık baskısı altındaki tarımsal sistemlerde su kullanım randımanını optimize etmek, bitki verimini korumak ve toprak verimliliğini sürdürülebilir bir şekilde artırmak için etkili, ekonomik ve çevre dostu bir strateji olduğu vurgulanmıştır.

This study evaluates the combined effects of biochar and seed priming on soil properties and physio-biochemical responses of sweet corn seedlings under different drought conditions. Three irrigation regimes were used to simulate drought stress: 100

Soil carbon sequestration and its monitoring is important to improve climate resilience and mitigate global warming. According to the European Environment Agency (EEA), soils in Europe are losing carbon that could hamper achieving the EU climate targets. Hence, it is necessary to explore the dynamics of soil organic carbon (SOC) storage in different ecosystems so that the EU policymakers can observe the progress towards achieving EU Green Deal objectives. The aim of this research was to quantify the Delta SOC-S in woodland and shrubland in the last decade (2009-2018) and to study the Delta SOC-S due to the land use conversion. In this regard, revisited sampling points between 2009 and 2018 from the topsoil (0-20 cm) of woodland and shrubland of the EU + UK soil database named Land Use/Land Cover Area Frame Survey (LUCAS) was used. The analysis revealed that broadleaved-woodland to coniferous- or mixed-woodland conversion in 2018, and shrubland to woodland conversion in 2015 increased SOC-S. Overall, we found a net accumulation of SOC-S in woodland (2184.08 ton ha(-1)) and shrubland (302.78 ton ha(-1)) soil with 7.78% increment in woodland and 12.56% in shrubland between 2009/12 and 2018. Also, in central Europe, mean annual temperature (MAT) increased and precipitation (MAP) decreased between the study periods. The relationship between precipitation and temperature showed that precipitation and SOC-S in woodland had no relationship, but with the rising temperature, SOC-S in both land types significantly decreased revealing warming can significantly affect SOC-S.

Hazelnut is a nut species that is strategically important to Türkiye. Hazelnut cultivation has various cost factors, with the highest share belonging to the harvesting. Following harvesting, sucker management, and fertilization are the most significant cost factors. Due to high labor requirements and costs, sucker removal, which is recommended to be performed twice a year, is often conducted only once a year or every two years. This situation leads to reduced yield per hectare and income loss for producers. To reduce costs, some producers use herbicides to remove hazelnut suckers. However, the widespread use of herbicides causes irreversible environmental damage and can lead to erosion, particularly on sloped lands. Moreover, the continuous use of herbicides poses risks such as leaving residues in the soil, harming soil microorganisms, and threatening the health of hazelnut plants. This study aimed to determine the effects of the application frequency of a 15% salt (NaCl) solution on hazelnut sucker removal, focusing on its impact on soil EC and pH. The study was conducted at the Ondokuz Mayıs University Ali Nihat Gökyiğit Research Station from 2019 to 2021. NaCl solution applications were planned to be performed once, twice, and three times a year. The effects of application frequency on the drying rate of suckers, the number and length of newly emerged suckers, and changes in soil pH and EC were evaluated. The results revealed that applying the NaCl solution three times a year was the most effective method for sucker management and did not cause adverse changes in soil pH or EC levels.0

Biochar is the carbon-rich product obtained when organic material pyrolyzed in a limited supply of oxygen. Using of biochar as soil amendment has been reported with positive effects on soil quality and crop productivity. The objective of this study was to evaluate the effect of biochars generated from various agricultural wastes on soil chemical properties of moderate acidic clayey loam soil and wheat yield. 5 months greenhouse pot experiment was conducted to gain insight on effect of biochars originated from various agricultural biomasses on soil chemical quality and wheat yield. The four types of biochars used were rice husk biochar (RHB), hazelnut waste biochar (HWB), wheat straw biochar (WSB), and tea waste biochar (TWB). The design of experiment was completely randomized with three replicates. The biochar application rate was 2

Based on precipitation data from six weather stations covering the period 1960–2024, this study presents a retrospective analysis of drought dynamics in the Rostov Region, Russia, and evaluates the potential of the SARIMA model for forecasting moisture regime fluctuations. The Standardized Precipitation Index (SPI) was employed as the primary drought indicator. Two key phases of crop development were analyzed: the vegetation initiation period (March–May), assessed using the three-month SPI of May (SPI-3), and the full active growing season (April–September), assessed using the six-month SPI of September (SPI-6). The Mann-Kendall test revealed a non-significant positive trend in SPI-3 across all stations, while SPI-6 trends were non-significant and varied in direction. The highest frequency of drought events, based on both SPI-3 and SPI-6, occurred during 1960–1969, with a general decline in subsequent decades. The lowest drought frequency was observed during 2010–2019. Notably, the frequency of extreme droughts has shown an increasing trend, posing significant risks to agricultural productivity. Although SARIMA modeling proved useful for short-term forecasting, its application was limited by unrealistic long-term projections and deviations from climatic norms. Consequently, drought forecasts were restricted to a two-year horizon. Nonetheless, the SARIMA approach remains a valuable supplementary tool for anticipating precipitation dynamics and drought events.

Biochar application has gained attention as an effective soil amendment for improving soil quality and increasing crop productivity, particularly in clay-rich soils facing challenges such as compaction, poor drainage, and nutrient limitation. This two-year field study evaluated the effects of fresh and artificially aged biochar on soil chemical, physical, and biological properties and wheat (Triticum aestivum) yield. The experiment was conducted on clay soil with treatments including no biochar application as a control (CK), 5 and 10 t ha−1 fresh biochar (B5, B10) and 5 and 10 t ha−1 aged biochar (AB5, AB10). The results showed significant improvements in soil pH, soil organic carbon, cation exchange capacity, total nitrogen, and plant-available water capacity, particularly with higher doses of biochar. In both years, the effects of the treatments on the soil quality index area (SQI-area) were found to be statistically significant. The AB10 treatment increased SQI-area by 19% compared to the CK in the first year and by 33% in the second year. In the first year, the highest grain yield was obtained from the AB10 treatment, reaching 5.25 t ha−1, which was 13% higher than the CK. In the second year, the highest yield was obtained from the B10 treatment, reaching 4.09 t ha−1, which was 24% higher than the CK. Despite these positive changes, the correlation between SQI and yield was not statistically significant, suggesting that crop yield may also depend on other interacting variables. These results highlight the potential of biochar, particularly aged biochar, as a sustainable practice to improve soil health and productivity in clay soils.

Soil is an indispensable entity for agriculture, and its health is essential to ensure phenomenal and sustainable agricultural practices. However, the increasing need for food security and the growth of industrial urbanization have led to soil pollution posing a significant threat to soil health, the environment, and public health. This study investigates the effects of heavy metals on plant anatomy, physiology, and morphology, focusing on how these metals displace essential nutrient uptake. Despite considerable research on soil contamination, gaps remain in understanding the mechanisms involved in heavy metals influencing plant health and the soil properties that govern their transformation, transport, and bioavailability. This study addresses these gaps by examining the impacts and mechanisms of heavy metal contamination on plant growth and identifying soil conditions that can mitigate contamination risks and remediation mechanisms. Through a comprehensive analysis, this study finds that heavy metals displace essential metal ions, inhibiting enzyme activity and disrupting critical processes. High concentrations of heavy metals produce free radicals and reactive oxygen species (ROS) in plant cells. This results in uncontrolled oxidation and the initiation of chain reactions with cellular biomolecules, causing oxidative stress and cellular damage. Additionally, this study highlights phytoremediation, bioremediation, and biochar as potential frameworks for remediating heavy metals contamination in agricultural soils. It proposes recommendations for future research to understand the synergistic effects of combining phytoremediation, bioremediation, and biochar which could lead to comprehensive soil remediation frameworks that are both economically feasible and environmentally friendly.

Soil organic carbon (SOC) and nutrient stocks play a key role in climate change mitigation by influencing biogeochemical cycles, plant productivity, and greenhouse gas emissions; however, their responses to the future projected warming scenarios remain uncertain. The aim of this study was to estimate the SOC and nutrient stocks under different land uses across the European Union (EU) and the United Kingdom (UK) in 2018 and to predict these stocks under the different warming scenarios (RCP2.6, RCP4.5, and RCP8.5) to identify the best land uses that can steadily maintain and improve SOC and nutrient stocks. A random forest model (R2 = 0.66) was employed to estimate soil bulk density. To predict the stocks for 2050 and 2070 under the different RCPs, mean annual temperature (MAT), total precipitation (TP), sand content, and land use types were used as the predictor variables. The results revealed that SOC and nitrogen (N) stocks increased under RCP2.6, while they significantly decreased under RCP8.5, particularly in croplands. In contrast, phosphorus (P) and potassium (K) stocks increased with rising temperatures across all land uses. Grasslands and shrublands appeared to be more resistant compared with croplands and woodlands, as SOC and N stocks did not show any notable changes with warming. Woodland ecosystems, especially pine-dominated woodland, exhibited an increase in these stocks, while spruce-dominated woodland showed a significant decline in SOC and N stocks with increasing temperature. These findings reveal the most climate-resistant and effective land management strategies to improve SOC and nutrient stocks and provide a roadmap for policymakers by recommending the cultivation of root crops, vegetables, and flowers in agricultural lands, and the planting of pine and broadleaved species in woodland to optimize SOC and nutrient stocks under future climate scenarios.

Coastal areas are facing increasing heavy metal pollution as a result of various anthropogenic activities, posing a serious threat to ecosystems. Modeling and understanding the sorption behavior of heavy metals in soils are essential for assessing their mobility and risk in the coastal landscapes. The aim of this study was to examine the adsorption behavior of Pb²⁺, Ni²⁺, and Zn²⁺ by common soil types of the Lower Don and the Taganrog Bay coast in Russia to better understand their potential environmental implications. The soil capacities for heavy metal adsorption and retention were determined using isothermal models. The maximum adsorption capacity and the binding strength parameter for the heavy metals were calculated, revealing significant differences among the soils. Haplic Chernozem emerged with superior values, while Gleyic Solonchak Sulfidic and Umbric Fluvisol trailed the lowest. All soils exhibited a greater adsorption capacity and binding strength for Pb compared to the other metals. The influence of soil characteristics on sorption and retention was also examined. The Pseudo-second-order model provided a more accurate description of the adsorption kinetics of heavy metals by the studied soils. The co-presence of metals in the system affected their sorption by the soils due to competition: soils adsorbed fewer metals but retained them more strongly. These findings are important for developing effective strategies to reduce heavy metal pollution in coastal ecosystems.

A greenhouse pot experiment was conducted to investigate the impact of various types of biochars originated from agricultural biomass on wheat biological yield (BY), harvest index (HI) and water use efficiency (WUE) in two types of soils of dissimilar textural and chemical properties. Two types of soils were moderate acidic clayey loam soil (pH, 5.07) and non-acidic clay soil (pH; 7.25). The five types of biochars amendments namely, rice husk waste biochar (RHWB), hazelnut waste biochar (HWB), wheat straw waste biochar (WSWB), tea waste biochar (TWB) and mixed wood waste biochar (MWWB) were applied and their effects on water use efficiency (WUE), harvest index (HI) and biological yield (BY) of wheat evaluated. The design of experiment was completely randomized with three replications, the biochar application rates were 0% and 2%. Most of the applied biochars improved WUE, HI, and BY in moderate acidic clayey loam soil. Non-significant changes observed for non-acidic clay soil. The results implies that biochar amendments in moderate acidic clayey loam soil could modify physicochemical properties of soil and improve water use efficiency and yield of wheat. Our results further highlights that the primary textural characteristic and other physicochemical properties of soil might affect the biochars’ effectiveness on water use efficiency and yield of wheat.

Calcareous soils, typically characterized by low fertility, low organic matter and nitrogen content, and often deficient in phosphorus, zinc, and iron, as well as having low microbial activity, require the development of sustainable soil conditioners to improve fertility. To address these shortcomings and promote sustainable agriculture, biochar, especially with acidic character, may offer a promising solution. This study investigates the effects of modified biochar by H2SO4 and ZnSO4 on soil properties and wheat yield under field conditions. For this purpose, biochar (B), acidified biochar (AB), Zn enriched biochar (BZn), and acidified-Zn enriched biochar (ABZn) were applied to the field at two different doses (0.5 and 1.0%) together with the control treatment (Ck) without biochar application. AB1.0% was determined as the most effective treatment in decreasing soil pH (0.15 units), while B1.0% was determined as the most effective treatment in increasing organic carbon and cation exchange capacity, 13% and 32%, respectively. The effect of the treatments varied for specific nutrients. The highest antioxidant enzyme activities were found in acidified biochars where the lowest yields were obtained. Compared to the Ck, the highest catalase (CAT) (32%) was determined in ABZn1.0%, ascorbate peroxidase (APX) (56%) and glutathione peroxidase (GPX) (36%) were determined in ABZn0.5%, and superoxide dismutase (SOD) (28%) was determined in AB0.5%. The highest proline (PRO), with the least decrease in yield, was found in the AB1.0% application, which is 205% more than Ck. B and BZn treatments all increased the grain yield, and the highest increase was 20% in B1.0% when compared to the Ck.

Bu çalışmanın amacı, fındık zurufu ve budama atıklarından elde edilen kompostun farklı dozlarda fındık ocaklarına uygulanmasının yaprakta makro besin elementi içerikleri (N, P, K, Ca, Mg) ve fındık verimi üzerine etkisinin araştırılmasıdır. Kompost materyali, Giresun İli Bulancak İlçe’sinde Tombul fındık çeşidinin hakim olduğu üretici bahçesinde 0, 0.5, 1.0, 1.5 ve 2.0 ton/da dozlarında fındık ocaklarında bitki taç izdüşümüne 50 cm genişliğinde 15 cm derinliğinde karıştırılarak tesadüf blokları deneme desenine göre 6 tekerrürlü olarak uygulanmıştır. Yaprak örnekleri hasat öncesi temmuz ayında alınarak N, P, K, Ca ve Mg içerikleri ve hasatta verim değerleri kg/ocak olarak belirlenmiştir. Kompost uygulama dozu artışıyla yaprakların makro besin element içerikleri N hariç genelde kontrol uygulamasına göre azalmıştır. Fındık yapraklarının makro besin elementi içeriklerinin genelde yeterli düzeyde olduğu belirlenmiştir. Fındık verimi kontrol uygulamasına göre artan kompost doz uygulamasıyla azalan düzeylerde artış göstermiştir. En yüksek verim 3.68 kg/ocak ile 1.0 ton/da kompost uygulamasında sağlanırken, en düşük verim 1.89 kg/ocak ile kontrol uygulamasında belirlenmiştir. Fındık ocaklarına 0.5, 1.0, 1.5 ve 2.0 ton/da dozlarındaki kompost uygulaması ocak başına verimi kontrol uygulamasına göre sırasıyla %74.07, %94.71, %84.65 ve %72.48 oranlarında artırmıştır. Bu çalışmayla fındık bahçelerinde hasat sonrası atıklardan elde edilen kompostun 1.0 ton/da dozunda uygulanmasının fındıkta verim artışı için tavsiye edilebileceği, zuruf ve budama atıklarının kompost olarak toprağa karıştırılmasıyla geri dönüşümlerinin de sağlanabileceği sonucuna varılmıştır.

Analytical techniques for elemental analysis in the soil-plant system have significance importance, especially emerging techniques such as synchrotron radiation (SR). Improved techniques allow samples to be examined in a non-invasive manner at high speed and resolution, resulting in better sample data. By applying various analytical techniques based on SR, it is possible to gather different information about the structure of the studied samples. In mining ecology, such techniques are widely used in assessing heavy metal-polluted sites, i.e., overburden dumps and areas around operating and mothballed mines. The present review elaborated insights into different analytical techniques for applying SR in plant-soil samples. The review also compared traditional research techniques with SR-based emerging and improved techniques. The need to use SR techniques for the complex diagnostics of sample structures to study their elemental and phase composition is substantiated. Using an integrated approach with SR, we can study the dynamics and speciation of HMs with carrier phases and uncover the mechanisms underlying the interactions between the adsorption centers of minerals, organic components, and heavy metals. It also improves the efficiency and accuracy of analysis and broadens the range of information obtained, which could lead to a more precise analysis of samples.

Toprak kökenli protozoa Polymyxa betae ile taşınan beet necrotic yellow vein virus (BNYVV), tüm dünyada şeker pancarı üretim alanlarında en yaygın görülen ve en tahripkar virüstür. BNYVV, özellikle şeker pancarı lateral köklerinin anormal şekilde artışına yol açması dolayısıyla kök sakallanması veya rhizomania olarak bilinen hastalığa neden olmaktadır. BNYVV’nin yanı sıra, şeker pancarı alanlarında kist nematodu (Heterodera schachtii Schmidt)’na da sık rastlanmakta olup, her iki problem verimde önemli kayıplara neden olabilmektedir. Bu çalışma; rhizomania hastalığına ve namatoda karşı son yıllarda ıslah edilmiş olan farklı genotiplerdeki [Rz1, Rz1+Rz2, Rz1+Rz3, Rz2+Rz3 ve Rz1+nematoda tolerant (Rz1+NT)] şeker pancarı çeşit ve hatlarının verim ve kalite performanslarının değerlendirilmesi amacıyla tesadüf blokları deneme desenine göre dört tekerrürlü olarak yürütülmüştür. Çalışma, BNYVV ve H. schachtii ile bulaşık olduğu bilinen Türkiye Şeker Fabrikaları A.Ş. Şeker Enstitüsü’ne ait Ilgın (Konya) deneme istasyonunda 2017 ve 2018 yıllarında gerçekleştirilmiştir. Pancarda yetiştiricilik açısından önemli parametreler (verim, şeker oranı, arıtılmış şeker oranı ve arıtılmış şeker verimi) dikkate alındığında, araştırma sonucunda Rz1+NT genotipinin, diğer genotiplerden daha iyi performans gösterdiği tespit edilmiştir. Bu alanda, hassas genotip ile kıyaslandığında 2017 yılında Rz1+NT genotipinde 81.77 ton/ha ile 2.7 kat, 2018 yılında 68.95 ton/ha ile 3.8 kat daha fazla pancar verimi elde edilmiştir. Bu genotipte şeker verimi ise, ilk yıl 12.16 ton/ha, 2. yıl ise 10.69 ton/ha olmuştur. Ayrıca, rhizomania’ya dayanıklı şeker pancarı genotiplerinde virüsün enfeksiyon durumu DAS-ELISA testine göre değerlendirilmiştir. İncelenen bu genotiplerin bazı tekerrürlerinde virüs belirlenmesine rağmen, BNYVV-Ilgın populasyonunun dayanıklı şeker pancarı çeşit ve hatlarının hiçbirisinde dayanıklılığı kırmadığı saptanmıştır.

Abstract In this study, the electrical conductivity (EC) of cultivated fields were predicted by pedotransfer functions (PTFs) using basic soil properties as variables in stepwise analyses. Before using PTFs, 207 soil samples were divided into development and validation datasets. This division was done 10 times to assess the accuracy and reliability of the PTFs. According to the principal component analysis (PCA), the EC values had higher load in PC1 and PC2 with clay, exchangeable Na, Ca, Mg and K contents. The EC values had significant positive correlations with pH, clay, exchangeable Ca, Mg, K, Na content, and negative correlations with silt and sand content. According to the stepwise analyses, 10 PTFs or linear multiple regression models were obtained using development data sets. The accuracy in development data sets and reliability in the validation data sets for these PTF models were assessed with R2 and RMSE values. The higher mean R2 and the lower mean RMSE values were obtained in the development data set when compared to the validation data set. The PTF-7 including clay, exchangeable Na, Mg and Ca was suggested to predict soil EC values of cultivated fields. It was determined that clay and exchangeable Na, Mg and Ca content were the most effective soil properties on predicting the EC values of cultivated fields. Keywords: Salt, EC, exchangeable cations, soil texture

Implementing compost can assist in improving soil structure and enable nutrient mobilization to plants that initiate an appropriate soil balance. In a greenhouse experiment, the influence of hazelnut husk compost (HHC), both in single and in combination with the phosphate solubilizing bacteria (PSB) on the wheat yield, yield parameters, and soil biological properties were investigated. A significant increase in yield and its quality parameters was recorded when the soil was treated with different doses of compost and bacteria. It was observed copious improvements in the soil biological properties with these applications. The microbial biomass carbon and total organic carbon ratios (Cmic:Corg) ranged from 1.51 to 2.09, were also remarkable in the organic amended soils. However, in all the treatments, the co-inoculation of bacteria with compost enhanced all the parameters significantly more than their individual applications. The highest yield increase over control (22.12%) was recorded from the integrated application of organic source and bio-fertilizer. This reflects a synergistic relationship between the compost and bacteria that eventually enhanced wheat production. It is therefore concluded that using HHC and PSB in soil can unfold promising possibilities for better soil health, which in the long run can contribute to sustainable food production.

Biyoçar kavramı, modern anlamda sürdürülebilir atık kullanımı ve toprak kaynakları yönetimine katkı sağlamak amacıyla geliştirilmiştir. Biyoçarın kalitesi elde edildiği hammaddenin özellikleri ve bileşimi tarafından belirlenir. Bu çalışmanın amacı çay atığı, buğday samanı, fındık zurufu ve çeltik kavuzu atıklarından biyoçar üretmek ve üretilen biyoçarların özelliklerini belirlemektir. Organik atıkların 450°C'de 2 saat süreyle pirolizi sonucunda biyoçarlar elde edilmiştir. Biyoçarlara ait verim, pH, elektriksel iletkenlik, katyon değişim kapasitesi, değişebilir katyonlar (kalsiyum, magnezyum, potasyum ve sodyum), azot, fosfor, kül içeriği, toplam karbon, C:N oranı, alkalinite, su tutma kapasitesi ve mikro element (demir, bakır, manganez ve çinko) içerikleri belirlenmiştir. Biyoçar türleri arasındaki önemli karakteristik farklılıkların elde edildikleri hammadde türlerinin bir fonksiyonu olduğu sonucuna varılmıştır. Fındık zurufu (FZB) biyoçarının besin tutma kapasitesi ve alkalinitesinin diğerlerine oranla daha yüksek olduğu belirlenmiştir. Buğday samanı biyoçarının (BSB) en yüksek su tutma kapasitesine, çay atığı (ÇAB) biyoçarının en düşük C:N oranına, çeltik kavuzu (ÇKB) biyoçarının ise en yüksek kül içeriğine sahip olduğu bulunmuştur. Elde edilen tüm biyoçar çeşitlerinin, bitki besin kaynağı olmalarının yanı sıra toprak kalitesini iyileştirici düzenleyiciler olarak kullanılma potansiyellerine sahip oldukları belirlenmiştir.

Objective: The objective of this study was to determine the effect of hazelnut husk released after production on some physical and biological properties, nutrient content, and hazelnut yield of hazelnut orchard soil. Material and Methods: In experiments, each hazelnut ocak was planted at a 4.0 m x 4.5 m distance to form a parcel; Hazelnut husk was applied at doses of 0, 25, 50, and 75 kg/ocak in a randomized block design with three replications. In the first, second, and third years following the application, soil samples were taken after the hazelnut harvest in order to, determine some physical, chemical and biological properties, nutrient content, and hazelnut yields. Results: Statistically, significant differences were determined in the organic matter (OM), penetration resistance (PR), bulk density (BD), soil respiration (SR), microbial biomass carbon (Cmic), total N, available P2O5, K2O and hazelnut yields (p<0.01) of the soil depending on the hazelnut husk dose applications. Depending on the application dose, hazelnut husk application increased the organic matter content of the soil by an average of 29.84% as compared to the control. Conclusion: As a result of the positive changes in the physical and biological properties of the soils, increases were obtained in the applied doses in the total N, available P2O5, K2O, and hazelnut yields of the soils as compared to the control.