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Global J. of Health Science     Open Access   (Followers: 5, SJR: 0.416, CiteScore: 1)
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J. of Agricultural Science     Open Access   (Followers: 4)
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J. of Food Research     Open Access   (Followers: 3)
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J. of Plant Studies     Open Access   (Followers: 1)
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Modern Applied Science     Open Access   (Followers: 1)
Network and Communication Technologies     Open Access   (Followers: 4)
Public Administration Research     Open Access   (Followers: 1)
Review of European Studies     Open Access   (Followers: 12)
Sustainable Agriculture Research     Open Access   (Followers: 3)
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Journal of Agricultural Science
Number of Followers: 4  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1916-9752 - ISSN (Online) 1916-9760
Published by CCSE Homepage  [43 journals]
  • Reviewer Acknowledgements for Journal of Agricultural Science, Vol. 14,
           No. 6

    • Abstract: Reviewer acknowledgements for Journal of Agricultural Science, Vol. 14, No. 6, 2022.
      PubDate: Tue, 10 May 2022 03:03:06 +000
  • The Impact of COVID-19 on the Agricultural System and Food Supply in Fiji

    • Abstract: Pacific Island Countries (Kiribati, Fiji, Samoa, and many others) rely on fisheries and agricultural systems for their livelihood and economic development. However, the COVID-19 scenario has led to vast degradation in the agriculture supply, economy, and food security system, resulting in poverty, an increase of unemployment percentage, and a decrease in the tourism industry. The policies related to COVID-19 restrictions, such as lockdowns, access to markets and social distancing, has caused a high reduction in the income of many households. Food purchasing from vendor markets and supermarkets has decreased rapidly due to its prices. Several individuals cannot afford to buy the food items, leading to lower food supply within and outside the country. In addition, several people have been moving to rural areas due to Unemployment. They have started to perform backyard gardening small-scale farming, which again results in lower production of commercial farmers and loss of food supply to consumers. Not only Fiji, but the whole world is experiencing the same situations, which have led to the Government making innovative actions against this deadly virus to protect the citizens from this pandemic. FNPF withdrawals, farming packages, and other initiatives indulged by the Government of Fiji and other Pacific Countries are being discussed in this review. Countries have examined the effects of the Coronavirus on the agricultural system and food supply chain in Fiji and other Pacific nations.
      PubDate: Tue, 10 May 2022 02:59:19 +000
  • The Assessment of Four Crop-Based Cropping System Productivity, Nutrient
           Uptake and Soil Fertility With Existing Cropping Systems

    • Abstract: Sustainable crop production through intensification of crops in cropping system is a global important issue to ensure food security, human and soil nutrition, poverty alleviation, and job opportunity creation. Rabi crop (mustard/lentil)-Jute cropping system and transplanted (T) Aman rice-Boro (T. Boro) rice cropping system are the traditional cropping systems in Low Ganges River Floodplain (AEZ-12) soils of Bangladesh. Jute and T. Aman rice are usually cultivated in summer season, but the T. Boro rice is cultivated in winter season. Jute and T. Boro rice are highly cost consuming crops due to need more irrigation, labors and fertilizer etc. T. Boro rice and jute are easily replaced by a short duration of mungbean and T. Aus rice in the existing cropping system. Hence field trial on different cropping systems were conducted in Regional pulses Research Station (RPRS), BARI, Madaripur and the adjacent farmers’ field of RPRS during 2013-14 and 2014-15 to compare and evaluate the four crop-based cropping systems with existing cropping systems based on system productivity, nutrient uptake and balance, profitability and sustaining soil fertility. The experiment was planned with six treatments comprising three of four crop-based cropping systems and three existing traditional cropping systems. The treatments were FCS1 (Mustard-Mungbean-T. Aus rice-T. Aman rice), FCS2 (Lentil-Mungbean-T. Aus rice-T. Aman rice), FCS3 (Fieldpea-Mungbean-T. Aus rice-T. Aman rice), ECS1 (Mustard-Jute), ECS2 (Lentil-Jute) and ECS3 (T. Boro rice-T. Aman rice) following randomized complete block design with three dispersed replications. As per results, the greater system productivity (rice equivalent yield: 16368 kg ha-1) was significantly obtained from FCS2 than the other system treatments. The FCS2 treatment exhibited the highest percent increment of rice equivalent yield (REY) over existing cropping system ECS1, ECS2 and ECS3 was 322%, 234% and 84.1%, respectively. Also higher %REY increment of FCS2 was 20.3% and 14.5% over the other four crop-based cropping systems FCS1 and FCS3. Production efficiency was highest in same FCS2 treatment. Land use efficiency increment was observed higher in Fieldpea-Mungbean-T. Aus rice-T. Aman rice cropping system. Total nutrient (N, P, K, S, Zn, B) uptakes and nutrient balance were positively influenced among the cropping systems, but both were showed inconsistent trends. The result of postharvest soil exhibited higher organic carbon (8.78 g kg-1) and total N content (0.74 g kg-1) was in FCS2 treatment. The FCS2 was also economically profitable and viable as compared to other cropping systems due to having higher gross return, gross margin and benefit cost ratio (2.48). The FCS3 was the second economically profitable and viable system as compared to other cropping systems. Intensification and diversification of crops from two to four crop-based cropping systems lead to increase the system productivity, profitability, and sustaining soil fertility. Results suggest that lentil-Mungbean-T. Aus rice-T. Aman rice followed by Fieldpea-Mungbean-T. Aus rice-T. Aman rice cropping system can practice in the experimental area for positive change the farmers’ livelihoods. This finding may be potential for the area where there is no practice of improving four crop-based cropping systems.
      PubDate: Tue, 10 May 2022 02:56:58 +000
  • Phenotypic Variability in the Induction of Alpha Acids in Hops (Humulus
           lupulus L.) in Brazil

    • Abstract: Hops (Humulus lupulus L.) is a key ingredient in beer, with great significance for the Brazilian industry. The economically viable production of hops in Brazil depends on the genetic variability available to be used in the selection and development of high-as performance photo-neutral cultivars and their interaction with the environment. The objective of this research was to evaluate the phenotypic variability of alpha-effective character in relation to the environmental variation in different Brazilian regions. Alpha-acids tests were performed through the American Society of Brewing Chemists (ASBC-HOPS 6. B-Conductometric titration methodology). Phenotypic variation assessment showed that 30% of the variation occurred among clones, while 47% was attributed to the environmental components of cultivation. The repeatability coefficient (t) was below 0.25, demonstrating that interaction between genotype and environment inflicted on alpha-acid levels. Results showed variability in the alpha-acid contents depending on the hops growing regions. According to the results, clones 9 (8.22%), 26 (12.95%) and 27 (9.94%) added the highest levels of alpha-acids. Therefore, there is variability available for the genetic improvement of the culture in Brazil and its effects must be evaluated in each microclimate of cultivation.
      PubDate: Tue, 10 May 2022 02:53:15 +000
  • Parasitism and Development of Tetrastichus howardi (Hymenoptera:
           Eulophidae) in Immature Spodoptera frugiperda (Lepidoptera: Noctuidae)

    • Abstract: Tetrastichus howardi (Olliff, 1893) (Hymenoptera: Eulophidae) is an endoparasitoid mainly of Lepidoptera. Its potential as a biological control agent has been investigated for several agricultural and forestry species in different countries. The objective of our study was to evaluate the biological characteristics of T. howardi in larvae, prepupae and pupae of Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae), under laboratory conditions. The first bioassay was performed with S. frugiperda larvae in the fifth and sixth instar and prepupal phases, which were exposed to the parasitism of 7 female T. howardi for 24 h. The second bioassay was conducted with S. frugiperda pupae, with parasitism allowed for 24 h, at six parasitoid of T. howardi densities, for one host pupa of S. frugiperda (1, 7, 14, 21, 28 or 35 parasitoids: 1 host). The parasitism of T. howardi in S. frugiperda larvae was confirmed by larval mortality and the emergence of parasitoid descendants. Female T. howardi parasitized and emerged from S. frugiperda larvae of fifth and sixth instars, prepupae, and pupae under laboratory conditions, which is the first record of such in the literature.
      PubDate: Tue, 10 May 2022 02:47:18 +000
  • Understanding Consumer Resistance to the Consumption of
           Environmentally-Friendly Agricultural Products: A Case of Bio-Concentrated
           Liquid Fertilizer Product

    • Abstract: Methane fermentation digested sludge is a sustainable resource that is used as a liquid fertilizer. An innovative liquid fertilizer called Bio-Concentrated Liquid Fertilizer (Bio-CLF) was developed to solve the problems such as high transportation cost associated with current liquid fertilizer. As an innovation product, Bio-CLF inevitably creates remarkable resistance from consumers. Hence, we used the Innovation Resistance Theory (IRT) to determine the reasons for consumer resistance to Bio-CLF products. A total of 2,000 samples from three major cities, including Tokyo, were extracted via the Internet, and 703 samples were finally selected for analysis. Perceived risk, complexity, and attitude toward existing products were found to have a positive and direct impact on consumer resistance to Bio-CLF products, while motivation and purchase intention were found to have a negative and direct impact on consumer resistance to Bio-CLF products. Notably, Relative Advantage and Compatibility had a positive impact on motivation and indirectly influenced consumer resistance to Bio-CLF products, the results of which are inconsistent with IRT, as those characteristics could have a direct influence on resistance. Additionally, we opted to provide some advice that for market managers: (1) allocate a specialized corner for the Bio-CLF product and (2) place the Bio-CLF product alongside other green products. For producers: (1) disclosure of production information; (2) design of an attractive and clear label sheet; (3) proving the advantage of Bio-CLF and that the Bio-CLF product is a green product.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Weed Control With Preemergence Herbicides in Azuki Bean

    • Abstract: Three field experiments were completed over a three-year period (2019 to 2021) in Ontario, Canada to develop weed management programs in azuki bean with herbicides (pendimethalin, S-metolachlor, halosulfuron, and imazethapyr) applied alone and in combination, and metribuzin, applied preemergence (PRE). At 2 and 4 weeks after emergence (WAE), there was ≤ 8% azuki bean injury from the herbicide treatments evaluated, with the exception of the treatments that included S-metolachlor which caused up to 19% azuki bean injury. Pendimethalin (1080 g ai ha-1) and S-metolachlor (1600 g ai ha-1) controlled green foxtail 83-94% but provided poor control of common lambsquarters, wild mustard, redroot pigweed, common ragweed, and flower-of-an-hour. Imazethapyr (75 g ai ha-1) controlled common lambsquarters, wild mustard, redroot pigweed, and flower-of-an-hour 90-100% but provided 76-82% control of common ragweed and green foxtail. Halosulfuron (35 g ai ha-1) controlled wild mustard 100%, common ragweed 81-84%, common lambsquarters 77-83%, flower-of-an-hour 72-75%, redroot pigweed 59-72%, and green foxtail 19-23%. The tankmix of pendimethalin + S-metolachlor controlled green foxtail and common lambsquarters 87-97% but the control was only 23- 83% on wild mustard, redroot pigweed, common ragweed, and flower-of-an-hour. The tankmixes of pendimethalin + imazethapyr and pendimethalin + S-metolachlor + imazethapyr provided 90-100% control of common lambsquarters, wild mustard, redroot pigweed, flower-of-an-hour, and green foxtail, and 78-87% control of common ragweed. The tankmixes of pendimethalin + halosulfuron and pendimethalin + S-metolachlor + halosulfuron controlled common lambsquarters and wild mustard 91-100%, green foxtail 76-95%, flower-of-an-hour 70-94%, redroot pigweed 68-91%, and common ragweed 78-79%. Metribuzin (280 g ai ha-1) controlled common lambsquarters, wild mustard, redroot pigweed, common ragweed, flower-of-an-hour, and green foxtail up to 94, 98, 81, 58, 98, and 61% respectively; control improved to 99, 100, 97, 84, 99, and 83%, respectively when the rate was increased to 560 g ai ha-1. Generally, weed density and dry biomass reflected the level of weed control. Weed interference reduced azuki bean yield by 91% in this study. Generally, azuki bean yield reflected the level of weed control.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Quality Improvement and Characterization for Production of Acceptable
           High-Quality Brown Rice Tofu in Japan

    • Abstract: The aim of this study was to improve the quality of brown rice tofu to produce it with a superior-quality. When the brown rice flour was heat treated with water, the water absorption rate of flour decreased using brown rice flour with a particle size range of < 212 μm when compared with that of brown rice flour with a particle size range of < 475 μm. The cohesiveness and gumminess of brown rice tofu made from brown rice flour with a particle size range of < 212 μm were fairly high in comparison with those of brown rice tofu made from brown rice flour with a particle size range of < 475 μm. In addition, the adhesiveness and cohesiveness of brown rice tofu remarkably decreased when heating and kneading times of brown rice flour dough were extended. By textural and sensory analyses, it became clear that the use of brown rice flour with a particle size range of < 212 μm and the extension of gelatinization time and heating and kneading times of the dough were important factors for preparation of high-quality brown rice tofu. Therefore, the results indicated that it could produce acceptable high-quality brown rice tofu having smooth and new palate feeling while suppressing adhesiveness and stickiness peculiar to rice flours.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Carbon Dioxide Emission, Soil Properties, Intercropping of Cucumber-Tomato
           and Carrot-Cabbage Crops Performance Affected by Application of Biochar,
           Urea, and Rock Phosphate

    • Abstract: Application of biochar soil amendment is a good practice to store carbon dioxide (CO2) in the soil to mitigate climate change, rock phosphate and urea fertilizer increase soil fertility to enhance food security. This greenhouse experiment aimed to evaluate the effect of biochar, rock phosphate, and urea on cucumber-tomato intercrop and evaluate the carbon dioxide (CO2) emission in the soil grown with cabbage-carrot intercrop. The first experiment was carried out using varying levels of rock phosphate (25, 50 kg ha-1), biochar (25, 50, 100 kg ha-1) and urea (30, 60 kg ha-1) and control with no fertilizer application. The treatment combinations were replicated three times resulting in twenty-one experimental pots. The second experiment involved the application of biochar at different levels of application (25, 50, 100 kg ha-1) and control with no fertilizer application, all the pots across the experiment received an equal application of urea at a rate of 30 kg ha-1 and rock phosphate at a rate of 25 kg ha-1 replicated three times resulting in 12 experimental pots for cabbage-carrot intercrop while 15 pots with an extra biochar application of 120 kg ha-1 for cabbage only. Results showed that High nitrogen plus High phosphorus (N + P) including Low phosphorus plus Medium biochar (Low P + MC), Low nitrogen plus Low phosphorus plus High biochar (Low N + Low P + HC), and Low nitrogen plus Low biochar (Low N + Low C) supported the height of cucumber while Low nitrogen plus Low biochar (Low N + Low C) and High nitrogen (High N) positively influenced height of tomato. There was no significant difference in the number of cucumber fruits produced since the control and high N treatments significantly got the same number of cucumber fruit. In contrast, Low nitrogen plus Low biochar (Low N + LC) treated to tomato crop got the highest number of tomato fruits. In the second experiment, the Highest biochar including High biochar and Low C (Low biochar), favoured cabbage’s height while no significant effort in the treatments to support carrot height. It was estimated that the High C treatment gave the highest carbon dioxide emission while the Highest C treatment stored carbon dioxide in the soil.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Effects of Foliar and Soil Application of Gibberellic Acid (GA3) at
           Different Growth Stages on Agronomic Traits and Yield of Rice (Oryza
           sativa L.)

    • Abstract: Use of Gibberellic acid (GA3) application in rice cultivation for increasing the grain yield is well documented. However, improper and untimely use of GA3 could result in poor response to GA3 application. This study was aimed at to investigate the timing of application during different growth stages and mode of application of GA3 on the growth and yield of MR219, a popular Indica rice variety, released by Malaysian Agricultural Research and Development Institute (MARDI). Two commercial GA3 formulations, namely ProGibb SG containing 40% GA3 and ProGibb silica Granule containing 0.1% GA3 were used for foliar and soil application, respectively. GA3 was applied at late tillering stage and at 10-30% panicle heading stage. Interestingly, GA3 application as foliar spray during the early reproductive stage, ie at 10-30% panicle heading stage enhanced the grain yield significantly, recording over 27% grain yield increase over the untreated control. Moreover, two applications of GA3 at 7 days’ interval has consistently given higher grain yield than single application. However, there is no significant difference in flag leaf characteristics, one thousand grain weight and milling qualities among different treatments. Our study has clearly illustrated that foliar application of GA3 at weekly interval at 10-30% panicle heading stage, can increase rice grain yield significantly.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Improving Maize Production and Farmers’ Income Using System Dynamics

    • Abstract: Maize demand for feed, industry, and consumption is increasing in line with the increase in population and industry, while the supply of maize does not meet the demand. Therefore, it is necessary to identify the significant variables that affect maize cultivation and scenarios to increase maize production and farmers’ income using simulation model. As a method to develop the models, a system dynamics simulation model is used to accommodate internal and external variables that affect the production and farmers’ income which can be done using organic fertilizer, the integration between land expansion and organic fertilizer, and the implementation of precision agriculture. The simulation results show that land area, use of fertilizers, and technology adoption affect the production and income of maize farmers. The scenarios developed include organic fertilizer scenario, expansion and organic fertilizer scenario, and precision agriculture scenario. The resulting scenario can be used as a recommendation for the government and stakeholders in developing strategies and policies related to a sustainable maize farming system that can help increase the production and income of maize farmers.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Mauritia vinifera Mart Substrates and Nitrogen Doses in Acacia mangium
           Willd Growth

    • Abstract: The objective of this study was to evaluate the effect of the combination of a substrate formulated with decomposed buriti stem (Mauritia vinifera Mart.) and nitrogen doses in the production of Acácia mangium Willd seedlings. A completely randomized design was used in a 3 × 5 factorial scheme, being the factors constituted of substrates formulated from decomposed buriti stem (DBS) mixed with dystrophic yellow oxisol in three proportions (0; 25 and 50%) and nitrogen doses (0; 100; 200; 300 and 400 mg dm-3) applied in cover. After 60 days from the emergency, it was made the following evaluations: Plant Height (PH), stem diameter (SD), internodes number (IN), dry mass of the shoot part (DMA), length and dry mass of the roots, robustness quotient through stem height/diameter relation, roots/dry mass relation and Dickson Quality Index (DQI). The multivariate analysis of variance showed a significant difference (p < 0.01) among averages vectors of treatments. The grouping analysis for the evaluated treatments allowed the division into four distinct groups. In the bi-dimensional plane formed by the first two canonical variables (Can.1 and Can.2) that withheld 99,47% of the total variance contained in the nine original variables, it is observed that the group II of treatments, composed of substrates formulated with 50% of soil + 50% of DBS supplemented with the doses of 200, 300 and 400 mg dm-3 of nitrogen, has provided a greater initial growth of A. mangium plants, as stated by the highest averages in all evaluated variables.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Bacillus-Based Products to Control Meloidogyne incognita Races 3 and 4 in
           Cotton and Compared Histopathology Using B. methylotrophicus

    • Abstract: Cotton meloidoginosis caused by Meloidogyne incognita races 3 and 4 is an important disease and can cause intense damage. The objective of this work was to test the effectiveness of commercial Bacillus-based products in the control of M. incognita races 3 and 4 of cotton in a greenhouse. Plants with and without nematode inoculation were used and subsequently evaluated for 200 days after the application of treatments. The products with Bacillus subtilis, B. amyloliquefasciens and B. subtilis + B. lincheniformis showed the best results in terms of shoot fresh matter weight. In relation to shoot dry weight, treatments with B. methylotrophicus (87 g, with nematode) and B. subtilis (80 g, with nematode) were superior, with emphasis on B. methylotrophicus. In the evaluation of root fresh weight, only the treatment with B. methylotrophicus (148.8 g, with nematode) provided statistically higher weight than the control. In item dry weight of root without nematode and nematode reproduction factor, the treatment with B. methylotrophicus stood out from the other treatments, making this the selected product to conduct the subsequent tests. With the acid fuchsin staining method, it was possible to verify that there was reduction in the penetration of J2 in the first days for plants treated with the bacteria. Upon adoption of the toluidine blue staining method, it was possible to observe abnormalities in giant cells with formation of vacuoles, thinner cell wall and females with large vacuoles inside. Thus, there is evidence that the use of biological products can be effective in controlling M. incognita.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Host Plant Reaction to Rice Yellow Mottle Virus and Allelic Diversity of
           RYMV1 Gene in Rice Cultivars in Uganda

    • Abstract: Rice Yellow Mottle Virus (RYMV) disease is endemic to Africa where it affects rice production. Host plant resistance would form a cost effective and sustainable option for managing the disease. However, there is still lack of knowledge on the reaction of rice germplasm and the genetic basis of their resistance/susceptibility to RYMV coupled with lack of molecular markers to facilitate the development of RYMV resistant varieties. We screened 56 rice accessions drawn from breeding lines and varieties commercially cultivated in Uganda for their resistance/susceptibility to RYMV. We also sought to develop and validate allele specific markers for RYMV1 alleles. The rice accessions showed variation in their reaction to RYMV; 14, 12, 17 and 13 accessions were categorized as resistant, moderately resistant, moderately susceptible and susceptible respectively. Among the resistant accessions, five possessed a single SNP (G/A) corresponding to the rymv1-2 allele. The new accessions can be deployed as resistant cultivars and/or used to introgress rymv1-2 allele into susceptible adapted cultivars throughout Africa. We developed two functional allele specific markers, which co-segregated with the rymv1-2 resistance allele in an F2 population and clearly differentiated between the susceptible and resistant individuals in the F2 population. The functional allele specific marker developed in this study can be used in MAS programs for introgression of rymv1-2 resistance allele.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Agronomic Efficiency of Signum Inoculant in Pre-inoculation of Soybean at
           35 and 20 Days Before Sowing in Treated Seeds

    • Abstract: Pre-inoculating soybean seeds can make sowing faster and provide additional benefits to farmers. However, it needs to guarantee the nitrogen supply to maintain the viability and sustainability of the technique. In this study, we evaluated the agronomic efficiency of SIGNUM® inoculant in the pre-inoculation at 20 and 35 days before sowing chemically treated soybean seeds. Experiments were conducted in four field experiments located at Paraná, Brazil, with a history of soybean cultivation managed under no-tillage systems, with crop rotation according to regional edaphoclimatic conditions. Agronomic efficiency in fields were compared with standard inoculation with a registered product used by farmers. Chemical treatment of soybean seeds with Standak Top® or Maxin XL® + Cruiser® associated with pre-inoculation of the inoculant SIGNUM® for 25 and 30 days reduced the concentration of viable Bradyrhizobium cells recovered from seeds. However, no significant difference was observed regarding nodulation, biological nitrogen fixation, and yield between the soybean inoculated with standard inoculation on farm or pre-inoculation with SIGNUM® in most studied areas.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Development and Leaf Morphofunctional Attributes of Native Species Used in
           Oil Well Base Revegetation

    • Abstract: This study aimed to evaluate the influence of soil preparation and mineral fertilization on according to the morphological growth and leaf morphofunctional attributes of native species used in the revegetation of the well base area of oil extraction. The experimental design was in randomized blocks in a split-plot scheme with 4 replications. The plots were the two soil types, and the subplots were the 5 planting fertilization treatments with NPK 04-14-08 with 0, 40, 80, 160 and 320 g pit-1. Four native species were planted and individually evaluated. The species responded in a variable way depending on the applied fertilization. The type of soil statistically influenced the number of leaves of Inga laurina, showing a greater number when cultivated in clayey soil. The other species did not differ in terms of soil type. For planting fertilization, it is recommended to apply 219.27 to 227.25 g pit-1 for Schinus terebinthifolius Raddi and 189.83 g pit-1 for Mouriri guianensis. The application of planting fertilizer for S. terebinthifolius Raddi and M. guianensis is recommended. The species Inga laurina, Garcinia brasiliensis and Chrysobalanus icaco developed better without planting fertilization. Leaf attributes demonstrated an adaptive response of plants regarding to environmental stress conditions to which they were submitted.
      PubDate: Tue, 10 May 2022 02:45:29 +000
  • Improving Carbon Dioxide Concentration, Growth and Yield of Tomato Using
           Fresh Manure and Agronet Cover

    • Abstract: Arable land area is declining in many tropical and sub-tropical regions and increasing tomato (Solanum lycopersicum L.) production is necessary due to its high demand. Food security amid scarcity of arable land could be achieved through intensification as a way of maximizing productivity per unit area of available arable land. Trials were conducted at the Horticulture Research and Teaching Field, Egerton University, Njoro, Kenya, to evaluate effects of agronet cover and fresh manure on carbon dioxide (CO2) concentration in the air around the crop canopy and tomato plant development. In addition to CO2 concentration levels, stem diameter, plant height, number of internodes and branches, number of fruit and fresh fruit weight were determined. Use of agronet cover and fresh manure resulted in higher CO2 concentration and enhanced tomato growth and yield. The highest CO2 concentration in the air around the crop canopy was in plots treated with fresh goat dung and those covered with agronet; the lowest CO2 concentration was in plots with no manure and those without agronet at all data collection dates. Application of fresh cow dung and covering plots with agronet stimulated tomato stem elongation; application of fresh goat dung and covering with agronet enhanced stem diameter, number of internodes and branches. Higher tomato yields were obtained with use of fresh manure and agronet cover. There were differences in response of tomato plants to fresh manure source with fresh goat dung showing greater potential for use in CO2 enrichment and enhancing tomato crop performance. Use of fresh manure and agronet covers could enrich CO2 levels in open field tomato production leading to improved growth and yield.
      PubDate: Tue, 10 May 2022 02:45:29 +000
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