Journal of Environmental & Agricultural Sciences - JEAS

18/11/2024

https://jeas.agropublishers.com/2024/02/agronomy-mcqs/

Agronomy MCQs, Agronomy, Crop Science, Crop Management, weather, climate,, Crop Ecology, Irrigation Management, w**d management, crops

17/11/2024

MCQs Horticulture

Horticulture MCQs, Parks and horticulture Authority, Olericulture, Pomology, Floriculture, Landscape, flowers, fruits, vegetables, grafting, budding, Pruning,

13/11/2024

Food Wastage: One of the Greatest Global Challenges

Food wastage, global challenge, food security, food insecurity, food losses, global hunger

12/11/2024

11/11/2024

Improvement of Flat Solar Air Collector Systems Varies With Structural and Material Modifications

Solar Air Collector, Improvement, Structural, Material Modifications, fibre-cement, solar energy, thermal, Vietnam, Hue University, air temperature

11/11/2024

https://jeas.agropublishers.com/2016/04/assessment-of-plasma-prolactin-and-nest-defense-behaviour-during-breeding-cycle-of-pigeon/

Plasma Prolactin, Nest Defense Behaviour, Breeding Cycle, Pigeon, Assessment, Columba livia domestica

10/11/2024

📢CALLING EDUCATORS, DESIGNERS COMMUNICATORS & FARMERS!

Celebrate hashtag by entering hashtag 2024 contests. 🗓️Submit your entries by 17 November👇

📕Booklet contest: https://bit.ly/40BEkQP

🎙️Podcast contest: https://bit.ly/40EkkwQ

👨‍🌾👩‍🌾Champion farmers contest: https://bit.ly/4fmvwCN

07/11/2024

Evaluating Heavy Metals Contamination in Soil, Water and Vegetables Cultivated in Three Areas of Ad-Dawadmi Governorate, Kingdom of Saudi Arabia

https://jeas.agropublishers.com/2023/09/heavy-metals-contamination-in-soil-water-and-vegetables/

Irrigation of croplands with untreated wastewater and industrial waste has caused contamination of soils and bioaccumulation of toxic metals in edible parts plants, threatening human health. The concentrations of seven different heavy metals (Cu, Fe, Zn, Ni, Cd, Pb, and Hg) were investigated in the soil, water and the root, fruits and leaf of carrot (Daucus carota), cucumber (Cucumis sativus) and parsley (Petroselinum crispum), collected from three regions; Arjaa, Sajir and Ad-Dawadmi, in Ad-Dawadmi Governorate, Western Riyadh, Kingdom of Saudi Arabia (KSA). The heavy metal contents of the samples were determined after digestion of samples using nitric acid, using Inductively-Coupled Plasma-Mass Spectrometry (ICP-MS). The plant translocation factors (TF) were calculated throughout this study. The results revealed that the concentrations of Cu, Fe, Zn and Ni in all vegetable samples from the three regions were found under the maximum permissible concentration of WHO and FAO Maximum Levels, 73, 425, 99 and 67 [(µg/g) mg/kg], respectively. Concentrations of Cd and Pb in the edible vegetable samples harvested from the Arjaa and Sajir regions are higher than their permissible limits by WHO, 0.36, 0.21; 1.29, and 1.68 with respect to 0.2, 0.3, respectively. Moreover, Hg was not detected in all investigated samples of vegetables, soil and water. Water samples collected from Sajir and Ad-Dawadmi and the soil samples collected from Sajir exceed the standard level of Zn (180, 157 and 103 µg/g respectively). The concentrations of Cd and Pb in the soil and water from the three regions exceed their respective permissible limits. Increased bioaccumulation of certain heavy metals can be a risk factor for consumers in the studied areas. Detailed studies are required to further assess threats of heavy metal contamination in the region.

Journal of Environmental and Agricultural Sciences (JEAS). Ghanem et al., 2023. 25(3&4):1-10.

26/10/2024

https://jeas.agropublishers.com/2023/10/health-protecting-properties-of-olive-leaves-via-antioxidant-profile-and-phenolic-composition/

Olive Leaves, Antioxidants, Health-Protecting Properties, Olea europaea, Phenolic Compounds, Turkiye, Microwave-assisted extraction, olive

25/10/2024

🇨🇴 In Colombia, indigenous farmers are embracing a local variety of climate-resilient beans that can withstand droughts & floods.

With FAO support, they are safeguarding their livelihoods & improving food security in the face of climate change.

https://bit.ly/3YwUrgU

22/10/2024

Ratooning response of rice to preharvest nitrogen application under different availabilities of stem reserves

https://doi.org/10.1016/j.eja.2024.127373

Plant N nutrition and preharvest stem nonstructural carbohydrates (NSCs) greatly influence ratoon crop yield in a ricesingle bondratoon-rice system. However, their physiological relationships haven’t been unraveled. Study was designed to test whether greater rice regeneration ability due to preharvest N application is accompanied by increased stem reserves, or whether plant N nutrition and stem reserves independently influence regeneration.

Preharvest N management is crucial for high ratoon crop yield in a ricesingle bondratoon-rice system. N application at 5 days after heading of the main crop effectively improved ratoon crop growth and yield. Ratoon crop growth was mediated by the availability of stem reserves, which were only partially increased by preharvest N application. The effect of the preharvest N application on ratoon crop growth and yield appears to be ensured even without increasing the availability of stem reserves so long as those reserves are above a sufficient threshold, but this improvement was negated at a too-low (deficient) level of stem reserves.

21/10/2024

Different Soil Improvers Enhance Cucumber Productivity by Suppressing Root-Knot Nematodes (Meloidogyne javanica L.)

https://jeas.agropublishers.com/2019/06/different-soil-improvers-enhance-cucumber-productity/

Root-knot nematodes (RKNs) severely infest cucumber crop; however, limited is known about the effect of different soil improvers on RKNs suppression and subsequent improvement in cucumber productivity. Therefore, the current study was conducted to infer the role of different soil improvers (i.e., humic acid, commercial dry yeast, rhizobium and Nemakey) in suppressing RKNs and improving cucumber productivity. The soil improvers were applied at the time of sowing and data relating to growth (leaf area, chlorophyll contents, root and shoot biomass), yield related traits (fruit width and length, number of aborted flowers, days to harvest and yield) and number of egg sacs and nematode larvae in soil were recorded. All soil improvers suppressed the number of egg sacs and larvae compared to control treatment, and the highest suppression was recorded with Nemakey compared to the rest of the soil improvers. Similarly, growth and yield related traits were improved by all soil improvers compared with the control treatment and the highest improvement was noted with Nemakey. It is concluded that Nemakey can effectively be used to suppress RKNs and improve cucumber productivity in nematode contaminated soils. Moreover, the efficacy of Nemakey should be tested for other crops.

Soil Improvers, Enhance, Cucumber Productivity, Suppressing Root-Knot Nematodes (Meloidogyne javanica L.), Different Soil Improvers, Enhance

21/10/2024

Investigating the impacts of different degrees of deficit irrigation and nitrogen interactions on assimilate translocation, yield, and resource use efficiencies in winter wheat

https://doi.org/10.1016/j.agwat.2024.109089

Four-year field experiment (2019-2023), under a rain-out shelter (with four irrigation and two N levels) was conducted to investigate the effects of water deficit and nitrogen (N) interaction on winter wheat growth, assimilate translocation, water/N use efficiency and yield.
Higher N application improved soil water utilization by 49.6-362.3%.
Water and N application increased assimilate translocation, except under severe water deficit.
Mild/moderate water deficit enhanced pre-anthesis assimilate translocation.
Severe water deficit hindered assimilate re-translocation.
Additional N during severe water scarcity reduced water use efficiency (WUE) by 13.4-44.7%.
Higher irrigation levels decreased WUE and irrigation water use efficiency.
Higher N application improved WUE and N use efficiency.
Severe water deficit reduced yield by 38.7%, primarily due to decreased kernels per spike.

Optimized water and N management strategies are crucial for sustainable winter wheat production. The study provides insights for targeted irrigation and N scheduling to enhance resource use efficiency and yield while ensuring environmental sustainability.