Maintaining Soil Fertility Research Articles

Substantiation of the Main Parameters of the Device for Intrasoil Application of Solid Mineral Fertilizers on Slopes

The main parameters of the device for the implementation of the intrasoil application of solid mineral fertilizers on the slopes, aimed at significantly reducing the washing off of the surface fertile layer and maintaining soil fertility, and increasing production volumes and the quality of crop production in general, are substantiated. Attention is paid to the interaction of the device with solid granular fertilizers on flat areas and simple slopes.

The Relationship and Influencing Factors between Endangered Plant Tetraena mongolica and Soil Microorganisms in West Ordos Desert Ecosystem, Northern China.

Soil microorganisms play crucial roles in improving nutrient cycling, maintaining soil fertility in desert ecosystems such as the West Ordos desert ecosystem in Northern China, which is home to a variety of endangered plants. However, the relationship between the plants-microorganisms-soil in the West Ordos desert ecosystem is still unclear. Tetraena mongolica, an endangered and dominant plant species in West Ordos, was selected as the research object in the present study. Results showed that (1) there were ten plant species in the Tetraena mongolica community, belonging to seven families and nine genera, respectively. The soil was strongly alkaline (pH = 9.22 ± 0.12) and the soil nutrients were relatively poor; (2) fungal diversity was more closely related to shrub diversity than bacterial and archaeal diversity; (3) among the fungal functional groups, endomycorrhizal led to a significant negative correlation between shrub diversity and fungal diversity, because endomycorrhizal had a significant positive effect on the dominance of T. mongolica, but had no significant effect on other shrubs; (4) plant diversity had a significant positive correlation with the soil inorganic carbon (SIC), total carbon (TC), available phosphorus (AVP) and available potassium (AVK). This study revealed the effects of soil properties and soil microorganisms on the community structure and the growth of T. mongolica and provided a theoretical basis for the conservation of T. mongolica and the maintenance of biodiversity in desert ecosystems.

Residual Effect of Organic and Inorganic Fertilizers on Growth, Yield and Nutrient Uptake in Wheat under a Basmati Rice–Wheat Cropping System in North-Western India

Restoring soil fertility in farming systems is essential to sustain a crop and its productivity. Thus, the present study was conducted to assess the residual effects of the combined application of fertilizers and manures on yield, concentration and uptake of nutrients in wheat under basmati rice-wheat cropping system. The treatments applied in the present study involve T1: control, T2: farmyard manure (15 t ha−1), T3: poultry manure (6 t ha−1), T4: press mud (15 t ha−1), T5: rice straw compost (6 t ha−1), T6: farmyard manure (15 t ha−1) + 50% recommended dose of nitrogen (RDN), T7: poultry manure (6 t ha−1) + 50% RDN, T8: press mud (15 t ha−1) + 50% RDN, T9: rice straw compost (6 t ha−1) + 50% RDN, T10: 75% RDN, T11: farmyard manure (15 t ha1) + 75% RDN, T12: poultry manure (6 t ha−1) + 75% RDN, T13: press mud (15 t ha−1) + 75% RDN, T14: rice straw compost (6 t ha−1) + 75% RDN, T15: 100% RDN. The residual effects of organic manures significantly improved the growth parameters and yield attributes. Among different residual treatments, the use of farmyard manure + 75% NPK showed maximum plant height (125.2 cm), number of tillers (68.0 m−1), chlorophyll content (45.0) and yield (50.84 q ha−1 for grain and 80.43 q ha−1 for straw, respectively). Additionally, the incorporation of farmyard manure + 75% RDN demonstrated the highest uptake of nitrogen, phosphorus and potassium in grain (7.37, 3.31 and 4.93 g ha−1, respectively) and straw (1.72, 1.05 and 12.63 g ha−1, respectively). The maximum zinc, copper, iron and manganese concentrations were observed to be 32.0, 3.1, 52.1 and 17.6 mg kg−1 in grain and 8.2, 2.1, 374.6 and 20.5 mg kg−1 in straw, respectively. Similarly, the highest uptakes were observed to be 67.6, 15.5, 263.8 and 89.6 g ha−1 in grain and 173.3, 16.8, 3026.9 and 170.6 g ha−1 in straw, respectively. Thus, the integrated application of farmyard manure with 75% RDN could be used to sustain wheat productivity and maintain soil fertility which otherwise deteriorates due to the sole application of inorganic fertilizers.

Achievements of the federal scientific center "all-Russian institute of forages V.R. Williams" in the study of fodder plants

Federal Williams Research Center of Forage Production & Agroecology for more than 100 years has been the largest scientific, methodological, research, intellectual center, which concentrates scientific knowledge, skills, and abilities related to the cultivation of fodder plants. Strategic areas of research for the period of activity of the Federal Williams Research Center of Forage Production & Agroecology, is the selection and seed production of fodder plants; meadow fodder production; field fodder production; development of technologies for procurement, storage and use of feed. The State Register of Breeding Achievements Approved for Use in the Russian Federation includes 227 varieties of forage crops (24 % of the total number of forage crops in Russia) bred by the Federal Williams Research Center of Forage Production & Agroecology, 57 varieties are released to all regions. Profound fundamental research is being carried out on meadow ecosystems, on the ontogeny of meadow grasses, and grassland technologies are being developed. Effective technologies for the restoration of degraded arid pastures and saline lands based on ecologically specialized plant species with extremely high salinity and drought resistance have been developed and put into practice. The total gene pool of halophytes and arid plants includes more than 1200 samples of 25 species. The result of bioresource and breeding work was the creation of 20 new varieties of drought-resistant fodder halophytes for arid territories from the families Chenopodiaceae, Tamaricaceae, Fabaceae, Asteraceae, Poaceae. Scientists of the Federal Williams Research Center of Forage Production & Agroecology developed the scientific foundations of field fodder production. It is shown that fodder crop rotations are the most important means of increasing the productivity of arable land, combating drought, erosion and soil dehumification. Perennial grasses on arable land are the most important means of protection against droughts, the basis for restoring and maintaining soil fertility. Experimental data on the preservative efficacy of compositions of experimental enzyme multisystems in combination with bacterial preparations have been obtained.

Perspectives on the Use of Biopolymeric Matrices as Carriers for Plant-Growth Promoting Bacteria in Agricultural Systems.

The subject of this review is to discuss some aspects related to the use of biopolymeric matrices as carriers for plant-growth promoting bacteria (PGPB) in agricultural systems as a possible technological solution for the establishment of agricultural production practices that result in fewer adverse impacts on the environment, reporting some promising and interesting results on the topic. Results from the encapsulation of different PGPB on alginate, starch, chitosan, and gelatin matrices are discussed, systematizing some advances made in this area of knowledge in recent years. Encapsulation of these bacteria has been shown to be an effective method for protecting them from unsuitable environments, and these new products that can act as biofertilizers and biopesticides play an important role in the establishment of a sustainable and modern agriculture. These new products are technological solutions for replacing deleterious chemical fertilizers and pesticides, maintaining soil fertility and stability, and improving crop productivity and food security. Finally, in the near future, scale-up studies will have to provide new information about the large-scale production of these materials as well as their application in the field under different biotic and abiotic stress conditions.

Effects of continuous straw returning on bacterial community structure and enzyme activities in rape-rice soil aggregates

Straw returning is an effective management measure to improve or maintain soil fertility in agricultural ecosystems. This study investigated the effects of straw returning combined with compound fertilizer on the bacterial community, enzyme activities, and soil nutrients’ contents in a rape-rice rotation soil aggregates. To do so, a 5-year field trial (November 2016 to October 2021) was carried out in a paddy soil with three treatments: no straw + no fertilization (CK), compound fertilizer (F), and straw returning + compound fertilizer (SF). Soil aggregates were classified into mega-aggregates (> 2 mm), macro-aggregates (0.25–2 mm), micro-aggregates (0.053–0.25 mm), and silt–clay (< 0.053 mm) using the wet sieve method. High-throughput sequencing was employed to characterize the bacterial community, and Pearson correlation coefficient was used to identify the relationships among bacterial community, organic carbon, nitrogen, phosphorus, and enzyme activities in soil aggregates. Compared with F, the results showed that straw returning increased the content of > 2 mm aggregates by 3.17% and significantly decreased the content of 0.053–0.25 mm aggregates by 20.27%. The contents of organic carbon and total nitrogen in > 0.053 mm straw amended aggregates increased by 15.29 and 18.25%, respectively. Straw returning significantly increased the urease activity of > 0.053 mm aggregates with an average of 43.08%, while it decreased the phosphatase and invertase activities of soil aggregates by 7.71–40.66%. The Shannon indices of the bacterial community in each particle sizes soil aggregates decreased by an average of 1.16% and the Chao indices of the bacterial community in < 2 mm aggregates increased by an average of 3.90% in straw amended soils. Nevertheless, the relative abundances of Chloroflexi and Nitrospirotain in all soil aggregates increased by 6.17–71.77% in straw amended soils. Altogether, our findings suggest that straw returning is an efficient approach to enhance soil structure, carbon and nitrogen contents, and the richness of soil bacterial diversity.

Influence of different organic amendments in modulation of soil physico-chemical characteristics and growth of marigold seedlings

Organic farming has emerged as a sustainable approach for increasing crop production while maintaining soil fertility. This eco-friendly practice relies on the use of various living microbes such as Rhizobia, arbuscular mycorrhiza fungi (AMF) and partially or fully decomposed biological materials like manure, compost, litter, coir, moss, and similar products used as soil supplements and/or conditioners for augmenting soil fertility. The present study was designed to evaluate the effect of these amendments on soil physico-chemical characteristics, and on germination and growth of marigold (Tagetes erecta) seedlings raised on these soils. The experiment was carried out in pots filled with garden soil amended with compost, moss, coir and NPK while un-amended garden soil served as control. Analysis of soil samples with organic materials show a slight change toward basic pH while inorganic fertilizer made the soil acidic. All the amendments led to increase in electrical conductivity while modulation of soil texture resulted in change in percolation rate. Amendments also resulted in changes in the soil nutrient content (organic C, N, P, K, Mg, Cu and Zn). However, coir and moss amendments did not bring about much change in nutrient status of the soil. There were notable changes in growth of marigold expressed in increased fresh weight, root length, shoot length as well number of nodes and number of leaves in amended soils. The study indicates that though coir and moss did not bring much change in nutrient status of soil but they altered the particle size for improved percolation.

ECOLOGICAL ROLE OF DIFFERENT SIDERATE CROPS IN IMPROVING SOIL PROPERTIES

The article describes the importance of various siderate crops in maintaining soil fertility. Biomass accumulated in the soil, level of preservation from erosion, effect on soil temperature in oil radish, rye and oil radish+rye options were studied.

Role of Agricultural Management in the Provision of Ecosystem Services in Warm Climate Vineyards: Functional Prediction of Genes Involved in Nutrient Cycling and Carbon Sequestration.

(1) Background: Maintaining soil fertility and crop productivity using natural microbial diversity could be a feasible approach for achieving sustainable development in agriculture. In this study, we compared soils from vineyards under organic and conventional management by predicting functional profiles through metagenomic analysis based on the 16S rRNA gene. (2) Methods: The structure, diversity and predictive functions of soil bacteria related to the biogeochemical cycle of the soil were analyzed, including oxidative and hydrolytic C-cycling enzymes, N-cycling enzymes and P-cycling enzymes. The inter-row spontaneous vegetation in the organic vineyards was also characterized. (3) Results: A clear effect of the farming system (organic vs. conventional) and cover management (herbicides plus tillage, mowing only and mowing plus tillage) on bacterial beta diversity and predicted functions was evidenced. While conventional viticulture increased the potential capacity of the soil to regulate the cycling of inorganic forms of N, organic viticulture in general enhanced those functions involving organic N, P and C substrates. Although the soil bacterial community responded differently to contrasting soil management strategies, nutrient cycling and carbon sequestration functions remained preserved, suggesting a high bacterial functional redundancy in the soil in any case. However, most of the predicted bacterial functions related to soil organic matter turnover were enhanced by organic management. (4) Conclusions: We posit the potential for organic viticulture to adequately address climate change adaptation in the context of sustainable agriculture.

Organic amendments with high proportion of heterocyclic compounds promote soil microbiome shift and microbial use efficiency of straw-C.

Soil microbial use efficiency of straw carbon (C), which is the proportion of straw-C microbes assimilate into new biosynthetic material relative to C lost out of the system as CO2, is critical in increasing soil organic C (SOC) content, and hence maintaining soil fertility and productivity. However, the effect of chemical structures of the organic amendments (OAs) on the microbial use efficiency of straw-C remains unclear. The effect of the chemical structure of the OAs on microbial use efficiency of straw-C was elucidated by a combination of 13C-straw labeling with high-throughput sequencing and pyrolysis-GC/MS. We found a strong positive correlation between the microbial use efficiency of straw-C and the proportion of heterocyclic compounds (Hete_C). The microbial use efficiency of straw-C was highest in soil supplemented with Hete_C-dominant OAs, which significantly shifted microbial community structure toward fungal dominance. Specifically, fungal-to-bacterial ratio, fungal richness, and the relative abundance of Ascomycota were higher in soil with a higher proportion of Hete_C-dominant OAs. Together, our study suggests that OAs with high proportion of Hete_C promote the microbial use efficiency of straw-C by increasing the dominance of fungi in the soil microbial community in agroecosystems.

Coupling Effects of Terracing and Vegetation on Soil Ecosystem Multifunctionality in the Loess Plateau, China

In semi-arid and arid terrestrial ecosystems, terracing and vegetation may improve soil conditions and enhance habitats. Considerable recent works have focused on evaluating how terracing and vegetation affect individual ecosystem function, but none of these evaluations included soil ecosystem multifunctionality (SEMF), which has a positive significance for optimizing soil ecosystem management. Based on the survey data of six different combinations of terracing and vegetation in the Chinese Loess Plateau, 15 functional indicators related to soil fertility, nutrient transformation/cycling, and water conservation were selected. The maximum conversion of the mean value method was employed to quantify SEMF. Concerning individual ecosystem services, the capacities of half-moon terraces-Pinus tabulaeformis (Ht-P. tabulaeformis) and level benches-Caragana korshinskii (Lb-C. korshinskii) to maintain soil fertility were 43.25% and 42.01% higher than those of counter-slope terraces-Platycladus orientalis (Ct-P. orientalis). On the contrary, Ct-P. orientalis showed better nutrient transformation and cycling services, which was 9.23% higher than those of Ht-P. tabulaeformis, therefore, we observed the highest SEMF in the Ht-P. tabulaeformis. Terracing, with a 29.2% explained variation, had a greater influence than that of vegetation (12.6%), while the coupling effect of terracing and vegetation (37.9%) was the most important factor that determined the SEMF. Thus, Ht-P. tabulaeformis and Lb-C. korshinskii should be promoted in the Loess Plateau area. The results of this study have significance in terms of understanding the interactions between terracing, vegetation, and soil ecosystems.

Phosphorus speciation and colloidal phosphorus responses to short-term cessation of fertilization in a lime concretion black soil

Long-term excessive mineral fertilizer application led to soil acidification and phosphorus (P) accumulation, increasing the risk of P loss and environmental pollution. The cessation of fertilization was widely considered as a cost-effective management strategy to relieve the situation, however, how the fertilization cessation influences the speciation and concentrations of P in bulk soil and the colloidal fractions, and whether the declining P concentration could maintain soil fertility are unclear. In this study, the effect of long-term fertilization (~40 years) and short-term cessation of fertilization (~16 months) on inorganic P, organic P, and colloidal P in lime concretion black soil were investigated with P sequential fractionation and 31P nuclear magnetic resonance spectroscopy (NMR). After long-term fertilization, available P, Ca2-P, Fe-P, orthophosphate monoesters, and orthophosphate diesters increased significantly, but soil pH decreased by ~2.8 pH units, indicating that long-term fertilization caused soil acidification and P accumulation as well as changed P speciation dramatically. In contrast, fertilization cessation in short term brought the increase of soil pH (~0.8 pH units) and decreased slightly for available P and inorganic P. The available P after fertilization cessation was 22.9-29.8 mg kg−1, which was still sufficient for crop growth requirements. In addition, fertilization cessation brought increases in the proportions of fine colloids (100-450 nm, including nontronite and some amorphous Fe oxides) and drove the significant release of Fe/Al oxides nanoparticles (1-100 nm) and associated P with the species of orthophosphate and pyrophosphate. In summary, fertilization cessation in short term could alleviate soil acidification and inorganic P accumulation effectively, at the same time maintain soil P fertility and improve the potential mobilization of P associated with microparticles.

Maintaining soil fertility by optimizing the use of nitrogen fertilizers in precision farming system

Maintaining soil fertility by optimizing the use of nitrogen fertilizers in precision farming system

Spectrophotometric indicators of “Zamin-M” biopreparation immobilized with gypan flocculinate

From the turn of the 20th century, biopreparations that quicken plant growth and development have been frequently employed. The accumulated knowledge of the mechanisms governing interactions between microorganisms and plants necessitates the use of minimal resources and energy in the targeted design of phytomicrobial systems and the optimization of their adaptability in order to increase soil fertility and plant productivity, increase plant yield, and increase plant resistance to diseases and unfavorable environmental conditions and stress factors. In the article today, enough experience has been collected on the scientific management of soil microorganism processes in the optimization of agricultural production and maintaining soil fertility, and it envisages the creation and use of microbiological preparations as the main link of intensive technologies in plant science. It is known that concentration of biomass of microorganisms using flocculants in the technological processes of production of bacterial preparations, after the stage of growth in enzymes, the stage of concentration of biomass of microorganisms from culture liquid is carried out.

Ecological assessment of the impact of vermicomposting on the growth and development of spring wheat in the soil and climatic conditions of the Republic of Karakalpakstan

The use of intensive technologies in agriculture, with the introduction of large amounts of mineral fertilizers, pesticides and a reduction in the application of organic fertilizers, has led to a shortage of humus balance in the soil. A progressive solution in this situation is the production and application of vermicomposting, which not only restores soil fertility, but also significantly increases the economic efficiency of agricultural industries. This article presents the results of a study that showed the reduction to a reasonable minimum of external anthropogenic impacts on the agro ecosystem and the activation of its own bio potential through the use of alternative fertilizers give a positive effect in maintaining soil fertility, protecting the natural environment and obtaining a sustainable harvest. The experience has shown that the degree of influence of fertilizer types turned out to be very significant in the variants where organic fertilizers and vermicomposting were applied, which clearly confirms that these types of fertilizers significantly affect the formation of plant biomass.

Environment-friendly synthesis of Feldspar-KH2PO4complexes by mechanochemical reactionMohammad Alrbaihat1,2*, Ehab AlShamaileh2and Aiman E. Al-Rawajfeh31Teacher Training Institute, Emirates School Establishment, Dubai, United Arab Emirates2Department of Chemistry, The University of Jordan, Amman, Jordan3Department of Chemical Engineering, Tafila Technical University, Tafila, Jordan*Correspondence:Mohammad Alrbaihat,moh.irbeihat83@hotmail.comReceived:02 January 2023;Accepted:06 January 2023;Published:30 January 2023Novel materials from Feldspar as clay material and KH2PO4(KHP) are prepared by grinding in a planetary

Novel materials from Feldspar as clay material and KH2PO4(KHP) are prepared by grinding in a planetary ball millin a mechanochemical process, one of the most effective ways to synthesize slow-release fertilizers. In two paths,tests were carried out with (3) weight ratio of Feldspar: KH2PO4contents, at mill the incorporation of KH2PO4andthe liberation of K + and PO43−ions into solution were assessed at rotating speeds ranging from 200 to 700 rpmfor 2◦h, and at milling periods ranging from 1, 2, and 3◦h. Thermal gravimetric analysis (TGA), X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), and ion chromatography (IC) were employed to analyze theproduced materials. The results confirmed that the mechanochemistry process is a sustainable chemistry methodto produce amorphous Feldspars containing KH2PO4. After dispersing Feldspar and KH2PO4in water for 24◦h,K+and PO43−ions were measured. Based on these studies, it has been demonstrated that intercalated Feldsparcould function as a carrier of K+ions and release PO34−ions as a slow fertilizer

Research on the Effectiveness of Some Fungicides and Insecticides in Combating of Some Diseases and Pests of Rape in Cristian Commune - Brașov County

In Romanian agricultural production, autumn rape is in present an indispensable component of crop rotations because helps to maintain soil fertility and contributes to sustainable production therefore. Behavior against fungal diseases and insect pests for modern rape varieties represents an essential agronomic property. Rape pest and disease control is a priority to minimize quantitative and qualitative production losses. In plant protection, fungicides and insecticides must to be used only when is necessary and at optimal times and doses. The notations were made during the vegetation period of 2020, 2021 and 2022. Both fungicides applied (125 g/l azoxistrobin + 125 g/l difenoconazol and 125g/l fluopiram + 125 g/l protioconazol) showed high efficacy against alternaria, black leg and powdery mildew, and in the variants where both fungicides were applied, the highest efficacy was 98.8% against black leg and 98.9% anti powdery-mildew. The effectiveness of the two insecticides applied (240 g/l tiacloprid and 5% lambda-cihalotrin) varied between 87.2 and 97.3 against Ceutorhynchus napi, C. assimilis, Phyllotreta atra, Ph. nemorum and Brevicoryne brassicae.

Pyrolysis-induced phosphorus transformations for biosolids from diverse sources.

Biosolids have been long used as a soil amendment to promote nutrient recovery. The readily releasable forms of nutrients present in this biowaste, such as phosphorus (P), along with their over application, can be detrimental to the environment, causing eutrophication. Pyrolysis, the thermal decomposition of organic materials at elevated temperature and low oxygen, seems to be a promising strategy to lower P release from biowastes such as biosolids. We pyrolyzed biosolids from various treatments and locations (Florida and Illinois; Galicia, Spain; and São Paulo, Brazil) to convert to biochar. Our objectives were (a) to use solid-state assessments, such as X-ray diffraction and scanning electron microscopy, and chemical assessments, such as water-soluble P (WSP), pH, Mehlich 3-extractable P (M3-P), total P (TP), and total Kjeldahl nitrogen, to evaluate changes caused by the conversion and (b) to compare P leaching potentials of biosolids and their corresponding biochars on two soils with varying P retention capacities. Pairwise comparisons indicated that biochar conversion significantly increased TP in the final material, but the absolute WSP decreased. However, M3-P remained the same after conversion to biochar. Cumulative P leached as a fraction of TP was greater for biosolids than their corresponding biochars. Two soils with contrasting P retention capacities predictably differed in P leaching behaviors as amended with biosolids and biochars. Differences suggest that future research could evaluate the efficacy of using mixtures of biosolids and biochar for a given soil to maintain soil fertility while reducing environmental P loss risk.

Using Nitrogen Stable Isotopes to Authenticate Organically and Conventionally Grown Vegetables: A New Tracking Framework

The demand for organic food products has increased in recent years due to them being perceived healthier, safer, and eco-friendlier by consumers, boosting the development of this industry. The higher retailing price of organic products increases the risk of fraudulent practices, making it necessary to establish control mechanisms to authenticate these products. However, the authentication of organic foodstuffs is a great analytical challenge that still requires further research. In the case of organic agriculture, regulations mainly determine the nutrient inputs that can be used by farmers, and generally prohibit the use of pesticides and/or synthetic fertilisers, aiming at maintaining soil fertility using green manures, composts, animal manures, etc. These inputs affect the final food product, and numerous analytical attempts, based on the measurement of multiple markers or complex chemical/physical profiles, have been tested over recent years. However, the high variability of these measurements due to weather condition factors reduces their efficiency and limits their use. In this sense, stable isotopes have emerged as an analytical technique with great potential for the authentication of organic agricultural products, due to their lower dependence on weather conditions and capability to reflect the origin of plant nitrogen, in the case of stable nitrogen isotopes. In this work, the feasibility was assessed using stable isotopes of bulk nitrogen for the organic authentication of four important horticultural crops (zucchini, cucumber, tomato, and pepper) produced in Almeria, southern Spain, which is the largest producing region with the highest export levels in Europe. To this end, 360 samples of vegetables were collected and their δ15N values were determined by combustion coupled to stable isotope ratio mass spectrometry (EA/IRMS). The results allowed an authentication framework to be established based on three ranges delimited by δ15N = 2‰ and δ15N = 5‰, which made it possible to detect with a high degree of confidence vegetables produced under proper organic practices (δ15N &gt; 5‰), conventional practices (δ15N &lt; 2‰), and samples that should be tracked over time to be considered organically produced (middle range). The results of this study demonstrated the potential of using δ15N as a single measure to authenticate organic vegetables, providing official bodies with a tool to make decisions about the organic accreditation of regularly inspected farmers.

Phosphate Solubilizing Bacteria (PSB) Isolation from Tomato Rhizospheres at Koka District, Ethiopia

Phosphorous is an essential macronutrient for plant growth and development. Most of the soil is deficient in plant available phosphorous and due to economic limitations majority of Ethiopian farmers applied inadequate fertilizers. It is essential to stabilize a mechanism to access P for plants with an efficient, cheap, and eco-friendly approach for enhanced crop growth and production. The main objective of this study was to screen efficient phosphate solubilizing bacteria from tomato rhizosphere soil. Using halo zone formation on PVK agar medium, more than 400 PSB isolates were isolated from 13 rhizosphere soil samples. By evaluating SI, texture in the culture-re-culturing process, liquid medium pH change efficiency and growth rate, upmost three promising PSB isolates (K-1-29, K-10-27, and K-10-41) were selected. Incubation of the isolates in PVK broth for five days showed significant pH reduction. For instance, isolate K-10-41 showed significant pH change (4.02) which indicates the organic acid production. Isolation and evaluation of efficient phosphate solubilizing bacteria maintain soil fertility, promote plant growth, induce plant response to pathogens, reduce agrochemical consumption and promote sustainable agriculture. Therefore, these selected PSB isolates need further detailed study for taxonomic identification, plant growth promotion, host range, and phytopathogen response. Local isolation improves environmental adaptation and indigenous competition.