Sandy soils are widely distributed in Egypt and are characterized by poor physical properties and a limited capacity to retain irrigation water and nutrients, which severely constrains agricultural productivity. Addressing these limitations has become increasingly critical to ensure sustainable crop production under arid and semi-arid conditions. Therefore, this study aimed to evaluate the effectiveness of biochar as a soil amendment for improving growth performance, yield, nutrient accumulation, photosynthetic pigments, and essential oil production of Mentha spicata cultivated under sandy soil conditions over two successive seasons (2024–2025). The field experiment consisted of four treatments: untreated control, NPK at 5 g L-1, biochar at 12.5 ton ha-1, and combined NPK (5 g L-1) and biochar (12.5 ton ha-1). The results showed that biochar application, either alone or in combination with mineral fertilizer, significantly improved all vegetative growth parameters, fresh and dry herbage yields, essential oil percentage and yield, leaf macronutrient content (N, P, and K), and chlorophyll b concentration. Biochar applied alone consistently outperformed mineral fertilizer alone, while the combined biochar–NPK treatment produced the highest values for all measured traits, with improvements exceeding the additive effects of individual applications. These enhancements were closely associated with increased nutrient accumulation and improved nutrient use efficiency, reflecting the ability of biochar to retain nutrients, reduce leaching losses, and synchronize nutrient availability with plant demand. The synergistic interaction between biochar and mineral fertilization highlights the potential of biochar as a sustainable soil amendment for improving productivity, quality, and resource-use efficiency of mint grown in low-fertility sandy soils.
Sandy soils are characterized by low organic matter content, weak nutrient retention, and limited water-holding capacity, which restrict crop productivity in arid and semi-arid regions. This study evaluated the individual and combined effects of biochar, Azolla pinnata, and eggshell powder on soil properties and the productivity of common bean (Phaseolus vulgaris L.) grown in sandy soil. Field experiments were conducted during two consecutive growing seasons (2021–2022) at the Ismailia Agricultural Research Station, Egypt, using a randomized complete block design with eight treatments and three replicates. Soil chemical properties, photosynthetic pigments, vegetative growth, biomass accumulation, and yield parameters were evaluated. The combined application of biochar, Azolla, and eggshell powder significantly improved soil fertility compared with the control treatment. Soil organic matter increased to 0.70%, while available nitrogen, phosphorus, and potassium reached 51.10, 6.67, and 200 mg kg⁻¹, respectively. The integrated treatment also enhanced chlorophyll content, plant growth, biomass production, and seed yield across both seasons. Correlation analysis indicated strong positive relationships between soil organic matter, nutrient availability, and crop productivity. These results demonstrate that the integrated application of biochar, Azolla pinnata, and eggshell powder can effectively improve soil fertility and enhance the productivity of Phaseolus vulgaris in sandy soil systems.
D. M. Khalifa, A. Alrashidi, Ammar Al-Farga et al.· Scientific Reports· 0 citations
This study explores the sustainable optimization of Valencia orange production in Egypt's arid regions by analyzing the dual effects of deficit irrigation and biochar soil conditioning. Multi-season field experiments demonstrated that Partial Root-zone Drying (PRD) combined with 1200 kg ha⁻¹ of biochar significantly enhances the vegetative growth, physiological traits, and final yield components of Valencia orange trees in degraded sandy soils. Severe water restriction (50% Full Irrigation [FI]) constrained canopy development and chlorophyll formation. In contrast, the PRD strategy produced superior growth responses, achieving an increased canopy volume of 4.1–4.3%, an expanded leaf area of 27.0–28.3 cm², and total chlorophyll levels up to 3.0 mg g⁻¹ F.W. The application of biochar showed a significant, dose-dependent improvement in soil water-holding capacity and nutrient retention. Under the optimal interaction treatment (PRD combined with 1200 kg ha⁻¹ biochar), the trees achieved peak agronomic performance. This synergistic combination maximized canopy volume increase to 5.5–5.8%, expanded leaf area to 37.9–40.1 cm², and elevated chlorophyll content to 3.7–4.0 mg g⁻¹ F.W. Furthermore, this treatment upgraded fruit development and quality indices; fruit weight reached 231.4–240.6 g, total yield peaked at 48.5–50 ton ha⁻¹, TSS reached 13.7–14.2%, and Vitamin C maximized at 48.8–51.3 mg 100 mL⁻¹ juice, confirming that biochar effectively mitigates drought stress. Complementing these findings, the treatments were simulated using the SALTMED model software to evaluate its predictive fidelity under local Egyptian conditions. The software demonstrated exceptional accuracy, establishing a robust correlation between field-collected data and model-generated values. This alignment was statistically validated by an outstanding coefficient of determination (R² ranging from 96% to 98%). Consequently, the study strongly recommends utilizing SALTMED for managing fruit crops in Egypt to save time, labor, and costs, while providing reliable predictive data to optimize export and import operations for vital commodities like citrus.
Unknown authors· the future of agriculture· 0 citations
Arid sandy soils are characterized by poor water retention, low nutrient availability, and limited productivity, posing major constraints to sustainable date palm cultivation under increasing water scarcity. A three-year field experiment was conducted to evaluate the combined effects of bentonite (BN), humic substances (HS), and Bacillus polymyxa (BP) under three irrigation regimes (70, 85, and 100% of crop evapotranspiration (ETc)) on soil hydro-physical properties, nutrient uptake, and fruit quality of ‘Siwi’ date palm (Phoenix dactylifera L.). Twelve treatment combinations (3 irrigation regimes × 4 soil amendment treatments) were evaluated over three consecutive growing seasons. The integrated application of BN, HS, and BP significantly improved soil hydro-physical properties by increasing field capacity and plant-available water while reducing bulk density. These improvements were associated with enhanced leaf N, P, and K concentrations and greater accumulation of total soluble solids, total and reducing sugars, phenolic compounds, flavonoids, and β-carotene compared with the untreated control. The combined application of BN (12 kg palm−1) + HS (1 L palm−1) + BP (28 mL palm−1) produced the most favorable overall responses. Moderate deficit irrigation (85% ETc) provided the best balance between fruit quality and water conservation, maintaining superior fruit biochemical quality while reducing irrigation water use by approximately 15% compared with full irrigation. Multivariate analyses further supported these findings by revealing strong positive associations among soil water availability, nutrient status, sugars, and antioxidant-related compounds, while climatic variables were closely associated with seasonal variation in fruit biochemical characteristics. Overall, the integrated application of bentonite, humic substances, and B. polymyxa under 85% ETc irrigation represents an effective management strategy for improving soil performance, enhancing fruit nutritional quality, and increasing water-use irrigation efficiency in sandy soils under arid conditions.
Nahed M. Rashed, Khairy H. Abd-El-Rahman, D. A. Elyazid et al.· Horticulturae· 0 citations
Mung bean (Vigna radiata L.) is a short-duration pulse crop of global importance, valued for its nutritional quality, nitrogen-fixing ability, and adaptability to semi-arid climates. In Afghanistan, particularly under Kabul agro-climatic conditions, productivity remains below global averages due to poor soil fertility, limited access to improved varieties, and inadequate nutrient management. This review synthesizes recent evidence (2022–2026) on organic and inorganic fertilizer practices in mung bean cultivation. Organic amendments such as poultry manure at higher application rates (8–10 t ha⁻¹) significantly enhance vegetative growth, pod formation, and grain yield [1,2,4]. Inorganic NPK fertilizers provide immediate nutrient availability but risk long-term soil degradation if applied alone [3,6]. Integrated nutrient management (INM), combining mineral fertilizers with organic inputs, improves soil fertility, microbial activity, and sustainability, offering superior productivity outcomes [7,11,12]. Improved varieties such as Enam demonstrate positive responses under INM strategies, underscoring the importance of genotype × environment × management interactions [2,5,9]. Recent studies highlight biofertilizers and micronutrient supplementation as promising approaches to further enhance nodulation, nitrogen fixation, and seed quality [3,8,10]. Key research gaps remain in varietal performance, soil fertility constraints, and region-specific INM practices. Adoption of integrated fertilizer management can substantially improve mung bean productivity and soil health in Kabul and similar semi-arid regions, contributing to food security and sustainable agriculture.
Shafiullah Mohmand, Prof. Mohammad Hamid Osmankhil· International Journal of Cur...· 0 citations
Increased food production has become a global urgency due to population growth and limited productive land. Efficient use of resources, particularly water, and optimization of marginal land such as peat soil are important strategies in sustainable agricultural production. This study introduces a novel combination of water depth management and biochar application to improve rice growth and yield on peat soils, an approach that has been rarely explored. The study was conducted using a Randomized Block Design with a 4 × 4 factorial pattern consisting of two factors. The first factor was water depth with four levels: 0, 3, 6, and 9 cm. The second factor was biochar dose with four levels: 0, 4, 6, and 8 tons ha−1. The results showed that water level did not significantly affect rice plant growth and yield. However, biochar dose treatment significantly affected plant height growth and plant productivity. The control treatment (without biochar) produced a yield of 1.47 ton ha−1, which falls within the typical range of rice yields on peat soils (1.1-1.9 tons ha−1). Application of 6 tons ha−1 of biochar increased yield by 1.12 tons ha−1 compared to the control, representing an improvement of approximately 76%. These findings indicate that the combination of water depth management and biochar application effectively improves rice productivity on peat soils. This study contributes new insights to peatland rice management by recommending a water depth of 0 cm combined with 6 tons ha−1 of biochar as an effective and sustainable strategy to enhance rice yield.
M. Fajarna, Helmi, M. Sayuthi· IOP Conference Series: Earth...· 0 citations
Wheat productivity is constrained by declining soil fertility and low nutrient-use efficiency resulting from the continuous dependence on chemical fertilizers. Integrated Nutrient Management, through the judicious integration of organic, inorganic, and biological nutrient sources, offers a sustainable approach to enhance crop growth, yield, soil health, and long-term productivity; however, its effectiveness in combination with nano-fertilizers requires further evaluation. Therefore, a field experiment was planned during the Rabi season of 2024-25 and 2025-26, at the research farm of Maharishi Markandeshwar (Deemed to be University), Mullana. The experiment was laid out in a two-factorial randomized block design with three replications. Factor A comprised two wheat varieties (WH 1270 and DBW 222), while Factor B consisted of eight nutrient management treatments involving RDF, vermicompost (2 t/ha), foliar nano urea (1250 mL/ha), foliar nano DAP (1250 mL/ha), and Azotobacter applied alone or in combination. The pooled data revealed that the variety DBW 222 showed significantly higher plant height (94.34 cm), number of tillers/meter row length (65.77), DMA/meter row length (224.82 g), LAI (5.56), spike length (9.84 cm), grains/spikes (48.31), effective tillers/m2 (300.80), test weight (40.27 g), grain yield (5042 kg/ha) and straw yield (6651 kg/ha) over variety WH 1270. Among various nutrient combinations, maximum plant height (104.65 cm), number of tillers/meter row length (70.51), DMA/meter row length (251.73 g), LAI (6.18), spike length (10.88 cm), grains/spikes (51.37), effective tillers/m2 (322.57), test weight (42.21 g), grain yield (5642 kg/ha) and straw yield (7439 kg/ha) was recorded with treatment T3 (100% RDF with vermicompost @ 2t/ha) which was found at par with T5 and T4. These treatments were found superior over T2, T6, T8 and T7. The least were found in T1
Sanjeev Kumar, I.S. Singh· Research on Crops· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
