Durum Wheat Production Research Articles

Improvement of cultivation technology of winter durum wheat in the conditions of the Kabardino-Balkarian Republic

Plants' nutritional elements have great opportunities to increase the yield of cereals, which contribute to the activation of initial growth and accelerate plants' development, stimulate the plumpness and grain formation, increase grain resistance to adverse soil and climatic conditions, increase productivity and biochemical qualitative indicators. In modern conditions, designing a technological system for regulating the growth and development of winter durum wheat by complex mineral fertilizers' application in steppe conditions of CBR is very relevant. The positive influence of nutritional elements on the development and root system of cereals has been revealed. Seeds of modern durum wheat varieties have high nutritional and taste qualities. The main direction of increasing winter durum wheat production is the introduction of new high-yielding varieties into production and their cultivation according to intensive technology with reasonable doses and norms of nutrients.

Évaluation de la rentabilité et de la productivité totale des facteurs de production des exploitations céréalières : cas de la culture du blé dur au Nord de la Tunisie

The main objectives of this paper are to assess the production costs and to measure the total factor productivity (TFP) of durum wheat production for a sample of cereal farmers in the North of Tunisia. Our hypothesis is that improvement of these indicators can reduce the production costs and consequently the improvement of producers' incomes. To test this hypothesis, a survey was carried out with 232 cereal farms in the subhumid region in the North of Tunisia cultivating durum wheat. The reconstituted costs approach was used to estimate the production costs. The results obtained show that total costs, production costs and net margins of durum wheat vary according to the farm size. About 67% of surveyed farms make a positive net margin. The empirical results of the regression reveal that productivity is negatively affected by the farm size, the new varieties demanding water and the investments made by the farm while it is affected positively by crop rotations

Evaluation of The Diversity of Durum Wheat Coleoptera (Triticum Durum Desf.) in the Region of Sigus Oum El Bouaghi (Eastern Algeria)

The Oum El Bouaghi region in Eastern Algeria, long considered as a cereal-growing area is nowadays a durum wheat production region par excellence. Although the damage caused by Coleoptera is very significant, studies on the knowledge of their diversity are few and remain limited for some entomological groups. Our work is the first step to evaluate the diversity of Coleoptera and the long-term impact of taking biological management measures against harmful fauna in favour of more environment friendly agriculture. To assess the beetle community, different sampling methods were combined (Barber trap, coloured traps, mowing net and sight hunting). Evaluation of the results of a single campaign showed that Coleoptera infested with durum wheat vary in abundance and diversity. We identified more than 100 species of Coleoptera belonging to 22 different families for a total number of 5698 individuals belonging mainly to the Carabidae, Curculionidae, Chrysomelidae, Scarabidae and Staphylinidae families. Although the majority of Coleoptera collected are pests of durum wheat crops (47.57%) the case of Tropinota hirta, Notaris sp or Oulema melanopus in particular, there was an interesting presence of predators (28.15%) the case of Carabidae or Staphylinidae in particular even with low relative abundance. The temporal evolution of the Coleoptera showed that the species diversity indicated a peak of abundance at the full tillering stage following an accentuated vegetative development of the host plant, and the presence of weeds. The data collected in this way constitute a basis for a preliminary knowledge of the durum wheat Coleoptera and can thus be used to design pest control strategies.

Improvements of Durum Wheat Main Crop in Weed Control, Productivity and Grain Quality through the Inclusion of FenuGreek and Clover as Companion Plants: Effect of N FertilizaTion Regime

Assessing the performance of legume species as companion plants is a prerequisite for promoting a low chemical-input durum wheat production system. This study aims to evaluate fenugreek (IC-Fen), clover (IC-Clo) and their mixture (IC-Mix) performances on weed control, productivity, and grain quality of durum wheat main crop under different N fertilization regimes, as compared to durum wheat alone with (SC-H) and without (SC-NH) herbicide. On-field experimentations were carried out in humid and semi-arid conditions. Results showed that legumes offer significant advantages in terms of weed control, soil moisture conservation, productivity, and grain quality for durum wheat cash crops. Results explain that these benefits depend on the legume part and the adopted N fertilization regime. Most significant improvements occurred with the IC-Mix under unfertilized conditions (N0) and relatively low and late N regimes (N1 and N2) where, for example, the partial land equivalent ratio of durum wheat grain yield (PLER) reached 1.25 compared to the SC-NH, with no need to sort the raw grain product (legumes seeds not exceeding 4.3%). Our study illustrates that under low and late N-fertilization condition using promising legumes species combinations result in the improvement of N fertilizer land-use efficiency and hence help to reduce N-fertilization inputs.

Correlation between productivity and grain quality of spring durum wheat and meteorological factors in the southern forest-steppe of the Western Siberia

The purpose of the current study was to identify the effect of meteorological factors on productivity and grain quality indicators of spring durum wheat in the conditions of Western Siberia. The research was carried out in the FSBSI “Omsk Agricultural Research Center” in 1981-2019. The object of the study was the durum spring wheat variety ‘Almaz', which was tested in the nurseries of the Competitive Variety Testing according to such traits as productivity, nature weight, hardness of grain, protein and gluten percentage, IDK, pasta color. The average productivity through the years of study was 2.51 t/ha, the differences between indicators in the unfavorable (1.54 t/ha) and favorable (3.48 t/ha) years were 1.94 t/ha. The grain nature weight in the years with good humidity was on 22g/l larger than in the arid years, the hardness of grain was on 5% larger. The protein and gluten percentage, the pasta color value was larger in the unfavorable climatic years (on 1.60%, 4.3%, 0.2 points, respectively), compared with favorable ones. There has been found that the productivity was positively associated with the precipitation in May and the 1st decade of July, relative humidity in May and June; there was established a negative correlation with air temperature in June. The nature weight of grain had a negative dependence on precipitation (1st and 2nd decades) and relative humidity in August for all decades. The hardness of grain was positively affected by temperature in May and precipitation in July (1st decade). The protein percentage in grain was negatively affected with precipitation and relative air humidity in May, June and July (1st and 3rd decades). Average daily temperatures in May and July had a positive effect on the protein percentage in grain. The gluten percentage had a positive correlation with the temperature in May and in the third decade of July. A negative dependence of this indicator was established with precipitation in May, June and the 3rd decade of July, with the relative humidity in May, June, July (1st and 3rd decades), August (3rd decade). The pasta color was negatively dependent on precipitation and relative humidity in July (3rd decade) and August (1-2nd decades).

Evaluation of durum wheat lines derived from interspecific crosses under drought and heat stress

AbstractThe productivity of durum wheat [Triticum turgidum subsp. durum (Desf.) van Slageren] is affected by drought and/or high temperatures, challenges to be amplified by climate change. Pre‐breeding using wild relatives can supply useful traits for durum wheat improvement to adapt to major abiotic and biotic stresses. Sixty‐seven lines issued from backcrosses of Cham5 and Haurani durum wheat varieties with accessions of Triticum aegilopoides (Link) Bal. ex Koern., T. dicoccoides Koern. ex Schweinf., T. urartu Thumanian ex Gandilyan, and Aegilops speltoides Tausch were evaluated for drought and heat tolerance. The trials were conducted during two seasons (2016−2017 and 2017–2018) at Tessaout, Morocco, under full irrigation (optimal conditions) and rainfed conditions (drought stressed) and at Wed Medani, Sudan, under full irrigation combined with heat stress. The recurrent parents, along with eight best cultivars and elite breeding lines, were used as checks. Drought reduced the grain yield by 62%. Grain yield and drought tolerance index were used to identify lines to be used by breeding programs to enhance drought and heat tolerance. The derivatives lines 142014 (Cham5*3/T. aegilopoides), 142074 (Cham5*3/T. dicoccoides), and 142015 along with the checks Icarachaz and Gidara 2 ranked among the best under heat stress. Under drought stress, the lines 141972 (Haurani*2/T. urartu) and 141973 (Cham5*2/T. dicoccoides) yielded 196 and 142% of their recurrent parents’ yield, respectively. High variation was found for agronomic and phenology traits, with heading time explaining 16% of grain yield under drought, while thousand kernel weight accounted for 18% of the yield under heat. We conclude that gene introgression from wild relatives pays off and can increase wheat resilience to cope with climate change effects.

Effect of Animal ByProducts Fertilization on Durum Wheat in Mediterranean Conditions: Preliminary Results.

This study aims to evaluate the effects of new-BioFertilizing Amendments (BFAs) deriving from fast organic matter decomposition of Animal ByProducts (ABPs) in comparison with ordinary soil organic amendments (compost), mineral N-fertilizers and no fertilization, on durum wheat development and production in a field trial under Mediterranean conditions. Results showed taller plants with heavier spikes and greater vigor in plots fertilized with BFAs when compared to no fertilization and N-fertilization, respectively. Likewise, BFAs fertilization resulted in higher protein content, gluten content, protein yields and higher values of yellow index with respect to no fertilization and N-fertilization. In contrast, lower values for test weight in correspondence of BFAs fertilization as well as no statistically significant differences on grain yield and gluten index were found. These preliminary results suggest that replacing N-fertilization with BFAs can be effective to ensure crop quality and yield stability in Mediterranean conditions.

Effect of Silicon Supply Methods on Durum Wheat (Triticum durum Desf.) Response to Drought Stress

Drought is a limiting factor of durum wheat production. Silicon (Si) is known by its positives effects on plant growth and development under these conditions. Thus, the current study was designed first to i) assess silicon impact on 11 durum wheat varieties performance under osmotic stress using four treatments in hydroponic trial: T1 = no stress, T2 = no stress +150 mg/l Si, T3 = osmotic stress at −0.3 Mpa and T4 = osmotic stress (−0.3 Mpa) + 150 mg/l Si. For the same objective, a pot trial was conducted with four treatments T1 = Water Stress; T2 = Water Stress + Si; T3 = Well Watered; T4 = Well Watered + Si. Results showed that in the presence of Si, the decrease of chlorophyll content, relative water content, shoot length and root length were less pronounced: 21.81%, 31.08%, 51.31% and 54.62% as compared to the control treatment (T1). Electrolyte leakage increases by 25.19% with Si addition. Also, under pot experiment, Si application improves chlorophyll content, relative water content and leaf area. Second, in order to identify the efficient method of Si supply i) seed priming ii) foliar spray iii) fertigation, another pot experiment was carried out with six treatments: T1 = Seed Priming +50% Field Capacity; T2 = Foliar Spray +50% Field Capacity; T3 = Fertigation +50% Field Capacity; T4 = Seed Priming +100% Field Capacity; T5 = Foliar Spray +100% Field Capacity; T6 = Fertigation +100% Field Capacity. The most effective Si supply method was Si foliar application.

Effect of Tillage, Previous Crop, and N Fertilization on Agronomic and Economic Performances of Durum Wheat (Triticum durum Desf.) under Rainfed Semi-Arid Environment

The implementation of conservation agriculture (CA) remains crucial for facing interannual variability in climatic conditions that impact durum wheat production and food security. The current work was conducted to assess the effects of the tillage practice, previous crop, and nitrogen (N) fertilization rate on the agronomic and economic performances of rainfed durum wheat in a semi-arid environment in Tunisia. Tillage practices included no-tillage (NT) and conventional tillage (CT). Preceding crops were either a common vetch or a bread wheat. The N rates applied were: 0, 75, 100, 120, and 140 kg N ha−1. Our results show that, based on a 2-year experiment, tillage practices are not affecting grain yield, grain N, and gross margins. However, the N-use efficiency of durum wheat was significantly higher when wheat was grown using NT. Grain yield and N content in grain were 340 kg ha−1 and 0.34%; much higher after vetch than after bread wheat. For both tillage practices, the merit of 75 kg N ha−1 is paramount to maximize yield through a more efficient use of available N. Our results highlight the importance of no-tillage-based CA combined with rotation, including vetch, on enhanced yields, N-use efficiency, and gross margins. These findings provide the evidence of the positive impact of CA for rainfed durum wheat under semi-arid Mediterranean conditions.

Adaptive Traits to Improve Durum Wheat Yield in Drought and Crown Rot Environments.

Durum wheat (Triticum turgidum L. ssp. durum) production can experience significant yield losses due to crown rot (CR) disease. Losses are usually exacerbated when disease infection coincides with terminal drought. Durum wheat is very susceptible to CR, and resistant germplasm is not currently available in elite breeding pools. We hypothesize that deploying physiological traits for drought adaptation, such as optimal root system architecture to reduce water stress, might minimize losses due to CR infection. This study evaluated a subset of lines from a nested association mapping population for stay-green traits, CR incidence and yield in field experiments as well as root traits under controlled conditions. Weekly measurements of normalized difference vegetative index (NDVI) in the field were used to model canopy senescence and to determine stay-green traits for each genotype. Genome-wide association studies using DArTseq molecular markers identified quantitative trait loci (QTLs) on chromosome 6B (qCR-6B) associated with CR tolerance and stay-green. We explored the value of qCR-6B and a major QTL for root angle QTL qSRA-6A using yield datasets from six rainfed environments, including two environments with high CR disease pressure. In the absence of CR, the favorable allele for qSRA-6A provided an average yield advantage of 0.57 t·ha−1, whereas in the presence of CR, the combination of favorable alleles for both qSRA-6A and qCR-6B resulted in a yield advantage of 0.90 t·ha−1. Results of this study highlight the value of combining above- and belowground physiological traits to enhance yield potential. We anticipate that these insights will assist breeders to design improved durum varieties that mitigate production losses due to water deficit and CR.

Efficient models for predicting durum wheat grain Cd conformity using soil variables and cultivars

Contamination of durum wheat grain by cadmium (Cd) threatens food safety and is of increasing concern because regulations concerning Cd are becoming stricter due to its toxicity. This work aimed at using soil variables and cultivar types to build models to predict whether durum wheat grain Cd will conform with current and possibly lower regulatory thresholds. We combined multiple Gaussian and logistic regressions and the random forest algorithm to take advantage of their strength. Models tested using cross-validation produced excellent performances including for the lowest regulatory threshold of 0.1 mg Cd/kg, half of the current one: 79–85% of the non-conformity cases were detected and the reliability of predictions was 69–82%. The models enabled identification of a x1.4 variability in grain Cd content between cultivars that do not have the low Cd accumulation allele of the Cdu1 gene. The models confirmed that for the grain Cd content, the between-cultivar variability had much less influence than the phytoavailability of Cd in soil, the critical contexts of which were characterized by the models. For farmers, these models are valuable tools to predict whether durum wheat production will conform with existing and future Cd regulation in foodstuffs.

The contractual relationships in the Italian durum wheat chain: empirical survey evidence

The paper investigates the vertical relations along the Italian durum wheat chain and the factors affecting farmers’ behavior in adopting contractual agreements. Sale/crop-growing contracts in the durum wheat sector are analyzed through a direct survey to a sample of 261 durum wheat farmers. The questionnaire collected data on downstream relations and contract terms between farmers and processing and/or marketing firms along the durum wheat chain. A logit model is used to identify factors affecting the likelihood of contract farming between farms and processors. One of the main issues emerging is the low frequency of written contractual forms between durum wheat farmers and downstream operators. In most cases the farmers do not want constraints and reveal a lack of trust in contracts. They prefer to sell their product to a local downstream operator with whom they have a long-standing and solid relationship of trust. Moreover, results of a logistic model show that certain farm features, such as turnover and degree of specialization in durum wheat production, play an important role in driving the decision to adopt written contracts.

Nitrogen Type and Availability Drive Mycorrhizal Effects on Wheat Performance, Nitrogen Uptake and Recovery, and Production Sustainability.

Plant performance is strongly dependent on nitrogen (N), and thus increasing N nutrition is of great relevance for the productivity of agroecosystems. The effects of arbuscular mycorrhizal (AM) fungi on plant N acquisition are debated because contradictory results have been reported. Using 15N-labeled fertilizers as a tracer, we evaluated the effects of AM fungi on N uptake and recovery from mineral or organic sources in durum wheat. Under sufficient N availability, AM fungi had no effects on plant biomass but increased N concentrations in plant tissue, plant N uptake, and total N recovered from the fertilizer. In N-deficient soil, AM fungi led to decreased aboveground biomass, which suggests that plants and AM fungi may have competed for N. When the organic source had a low C:N ratio, AM fungi favored both plant N uptake and N recovery. In contrast, when the organic source had a high C:N ratio, a clear reduction in N recovery from the fertilizer was observed. Overall, the results indicate an active role of arbuscular mycorrhizae in favoring plant N-related traits when N is not a limiting factor and show that these fungi help in N recovery from the fertilizer. These results hold great potential for increasing the sustainability of durum wheat production.

The effect of bio products Bloom & Grow and Immune system on spring durum and bread wheat productivity in the Chuvash republic

The current paper has presented experimental data on the growth, development, productivity and grain quality of spring durum and bread wheat after use of bio products Bloom & Grow and Immune System on light-gray forest soils of the north of the Chuvash Republic. The trials on the durum wheat cultivation in the conditions of the Chuvash Republic were carried out for the first time. The results of two-year study have showed that the plants treated with bio products had a 7–8 days’ shorter vegetation period. At the same time, the height of the treated bread wheat plants significantly has exceeded the control variant on 12.5 cm; the main head was on 0.4 cm longer, the number of grains in it was 6.1 pieces more, and the grain weight was larger on 0.23 grams. The height of the spring durum wheat plants treated with micronutrients has exceeded the control variant on 25.1 cm, and the length of the main head, the number of grains in it and the grain weight have significantly exceeded the indices of the control variant. 1000-grain weight has exceeded the value of the control variant on 7.28 grams. It has been established that the productivity increase of spring bread wheat was 0.89 t/ha (26.3%) and that of durum wheat was 0.93 t/ha (28.6%) compared with the control variant. The use of bio products Bloom & Grow and Immune System has resulted in an increase of gluten content in spring bread and durum wheat, and in an improvement of the gluten deformation rate to group 1 with the accumulation of minerals. The current study conducted in the vegetation period of 2018–2019 has showed that the bio products Bloom & Grow and Immune System are effective, and combine the properties of a growth stimulator and an immune modulator.

Combining QTL Analysis and Genomic Predictions for Four Durum Wheat Populations Under Drought Conditions.

Durum wheat is an important crop for the human diet and its consumption is gaining popularity. In order to ensure that durum wheat production maintains the pace with the increase in demand, it is necessary to raise productivity by approximately 1.5% per year. To deliver this level of annual genetic gain the incorporation of molecular strategies has been proposed as a key solution. Here, four RILs populations were used to conduct QTL discovery for grain yield (GY) and 1,000 kernel weight (TKW). A total of 576 individuals were sown at three locations in Morocco and one in Lebanon. These individuals were genotyped by sequencing with 3,202 high-confidence polymorphic markers, to derive a consensus genetic map of 2,705.7 cM, which was used to impute any missing data. Six QTLs were found to be associated with GY and independent from flowering time on chromosomes 2B, 4A, 5B, 7A and 7B, explaining a phenotypic variation (PV) ranging from 4.3 to 13.4%. The same populations were used to train genomic prediction models incorporating the relationship matrix, the genotype by environment interaction, and marker by environment interaction, to reveal significant advantages for models incorporating the marker effect. Using training populations (TP) in full sibs relationships with the validation population (VP) was shown to be the only effective strategy, with accuracies reaching 0.35–0.47 for GY. Reducing the number of markers to 10% of the whole set, and the TP size to 20% resulted in non-significant changes in accuracies. The QTLs identified were also incorporated in the models as fixed effects, showing significant accuracy gain for all four populations. Our results confirm that the prediction accuracy depends considerably on the relatedness between TP and VP, but not on the number of markers and size of TP used. Furthermore, feeding the model with information on markers associated with QTLs increased the overall accuracy.

A Crop Model for Improvement Water Use Efficiency and Durum Wheat Pro-duction in the Siliana Region

In Tunisia, the development of the irrigation within the water scarcity context, remains one of the crucial issues in agricultural activity. The phenomenon of climate change is likely to make the problematic while threatening the country's food security. Thus, high water use efficiency is essential to overcome these constraints and to facilitate sustainable agricultural activity. This work aims to optimize irrigation water use and to increase the production of the durum wheat (DW) through improving irrigation practices. For this, a field survey was carried out with a sample of 43 farms from the Siliana region. In data collection process, current study focused on the DW activity during the agricultural compain of 2015 in terms of the applied doses of water and fertilizer as well as the crop rotation. A crop model, CROPSYST, has been developed. The model used DW activity during three consecutive crop production periods as 2015, 2016 and 2017. Three strategies of varied mix in terms of irrigation water and fertilizer doses were simulated. The results showed the improvement of the yield by 9% that allowed an improvement of the water productivity up to 8,2 kgha -1 mm -1 .Given these results the Gross Margin may increase by 3% up to 11%.

The sowing date of winter durum wheat

Winter durum wheat is one of the most important crops. This grain crop forms the grain from which high-quality pasta and groats are obtained. The insufficient knowledge of the elements of cultivation technology of this grain crop is one of the factors that limits its widespread use. The sowing date is one of the main elements of cultivation technology of winter durum wheat, which determines the duration and conditions of vegetation, which its productivity depends on. The study was carried out at the FSBSI “Agricultural Research Center “Donskoy” in 2013–2018 in the field crop rotation of the laboratory of grain crop cultivation technologies. There were studied four sowing dates, September 10, 20, 30 and October 10 according to three forecrops (weedfree fallow, peas, sunflower). The total area in the trials was 55 m2, and the accounting area was 41.25 m2, fourfold repetitions. The arrangement of variants in the repetitions was systematic and sequential. The trial was laid down and carried out in accordance with Dospekhov’s methodology of a field trial (1985). As a result of the conducted study, it was determined that the minimum period from sowing date to winter durum wheat sprouting was in the variant with weedfree fallow (from 21 to 27 days) maximal period was in the variant with sunflower (from 27 to 37 days). From the germination period to the finish of autumn vegetation of winter durum wheat (from the early sowing date (September 10) to the late sowing date (October 10)), the vegetation period of the plants decreases, their provision with positive and active temperatures and moisture increases depending on the forecrop. The largest productivity of winter durum wheat was obtained due to weedfree fallow (from 5.74 to 6.44 t/ha), and the smallest productivity of winter durum wheat was obtained when sown after sunflower (from 4.61 to 5.09 t/ha). For all forecrops, the largest yields of winter durum wheat are formed when sowing from September 10 to September 30, which proved to be optimal for this grain crop.

Identification of valuable sources of resistance to Zymoseptoria tritici in the Tunisian durum wheat landraces

Tunisia is one of the main producers of durum wheat, the most consumed cereal in Tunisia and represents a trademark of several local dishes such as couscous and bulgur. Nonetheless and despite its leading stand in the local consumption and commercial share, a scarcity in Tunisian durum wheat production has long been a major problem obstructing the fulfilment of the increasing local demand. Septoria tritici blotch (STB) caused by Zymoseptoria tritici (Z. tritici) is one of the most common and detrimental foliar disease on durum wheat in Tunisia causing considerable yield losses. To-date and despite the damaging effects of STB on durum wheat, limited sources of resistance to Z. tritici have been identified. In this present study, we assessed necrosis and pycnidia development of a collection of 304 Tunisian durum wheat landraces representative of 11 landrace populations and artificially inoculated with Z. tritici at the seedling stage under controlled conditions and at the adult plant stage under field conditions. Based on necrosis and pycnidia scores, a hierarchical classification analysis clustered the durum wheat landraces into three phenotypic classes of response to Z. tritici, namely resistant, intermediate and susceptible genotypes. While resistant plants represented the most frequent class at the seedling stage, susceptible phenotypes were more frequent at the adult plant stage. Nevertheless, a heat map correlation study showed that resistant landraces with low-percentages of necrosis and pycnidia at seedling and adult plant stages represented the dominant group within the tested collection. Moreover, the assessed frequencies per landrace populations of the resistant, the intermediate and the susceptible accessions to Z. tritici infection at the adult plant stage for pycnidia development has shown that the landrace populations Badri, Jneh Khotifa (JK), Mekki and Taganrog were the highest resistant accessions, in contrast to the landrace populations Biskri, Mahmoudi, Azizi and Biada where susceptible genotypes were predominant. Mahmoudi and Azizi represented the most variable landrace populations encompassing the three phenotypic classes. Our results highlight that Tunisian durum wheat landraces may harbour variable and stable sources of resistance to Z. tritici at seedling and adult plant stages, which would represent a good basis for further investigation and deployment in breeding programs to enhance STB resistance.

Study of the effect of associative rhizobacterial strains on the formation of spring durum wheat productivity

The article considers the influence of strains of associative rhizospheric growth-promoting bacteria on the growth and productivity of spring durum wheat. Seeds before sowing and plants in the tillering phase were inoculated with a suspension of rhizospheric bacteria Azospirillum brasilense of strains Sp245, Sp7, Cd, SR80 and SR88, Ochrobactrum cytisi IPA7.2, Enterobacter cloacae K7. Significant differences were observed in terms of productivity of inoculated wheat plants in comparison with the control. Two strains of bacteria A brasilense SR80, SR88 promoted plant growth. Strains of rhizospheric bacteria A. brasilense Sp245, Sp7, SR80, SR88, and E. cloacae K7 under arid conditions of the Volga’s Left Bank of the Saratov Region contributed to an increase in the photo synthetic surface of leaves and the productivity of photosynthesis, which affected the formation of spring durum wheat productivity. Strains of rhizospheric bacteria A brasilense Sp245 and Sp7 positively affected the grain quality. Agrobiotechnology based on associative microsymbionts can be used to optimize environmentally sound technologies for the production of durum wheat (Triticum durum Desf.) in the organic farming system.

Optimizing blended (NPSB) and N fertilizer rates for the productivity of Durum wheat (Triticum turgidumL.var. durum) in Central Highlands of Ethiopia

Durum wheat is one of the major cereal crops produced in East Shewa Zone, Oromia Regional state for the purpose of both home consumption and market. However, its productivity is low due to low avai...