Soil improvement

Vacuum consolidation preloading method (VCM) has been widely adopted as an effective solution for soft soil improvement over the world. Recently, VCM has been successfully applied for improving the geotechnical properties of dredged mud, which is normally dumped at reclamation area by hydraulic pumping.

10p viyoko 24-09-2024 1 1   Download

Unsaturated soil behaviors characterize the failure mechanisms of geotechnical infrastructures with transient seepage conditions. Therefore, an accurate estimate of the unsaturated groundwater flow is vital in improving hazard management and assessment. This study attempts to develop a numerical scheme for 2-D transient analysis under unsaturated conditions.

11p viyoko 20-09-2024 2 1   Download

Rhizobia topic has been re-focused in recent years because of new findings on their traits not only as nitrogen-fixing bacteria but also as plant growth-promoting rhizobacteria. When combing rhizobial strains with novel biological carriers (e.g., biochar) for inoculant production, it brings great potential for improving soil health in long-term.

29p vibego 02-02-2024 2 1   Download

This study pointed out that growing an intercrop and retaining its residues as in situ mulch between the cotton rows can improve soil condition by increasing soil microstructure, water stable aggregation and infiltration rate, and reducing run-off and soil loss.

5p thebadguys 15-01-2022 12 0   Download

Objectives of the study: Identifying soybean lines and varieties tolerant to waterlogging for the development of Winter soybeans on wet soil in Hanoi; developing appropriate cultivation technical measures to improve the yield of Winter soybeans on wet soil after Summer rice harvesting in Hanoi.

27p guitaracoustic09 14-01-2022 14 2   Download

Objectives of the study: Identifying soybean lines and varieties tolerant to waterlogging for the development of Winter soybeans on wet soil in Hanoi; developing appropriate cultivation technical measures to improve the yield of Winter soybeans on wet soil after Summer rice harvesting in Hanoi.

27p guitaracoustic09 14-01-2022 13 2   Download

Overall objectives: Research and propose the solutions to treat straw in the field so that reducing on-field rice straw burning and improving the soil properties in intensive rice soil.

25p guitaracoustic02 08-12-2021 21 3   Download

Research purposes: To identify the content of fine gravel to improve the density of the soil to meet the standard of upgrading and repairing the earth-dam. To identify the proper content of cement to reduce the disintegration of the soil that contains a significant amount of fine gravel to meet the standard of upgrading and repairing the earth-dam.

27p hobbsandshaw 09-06-2021 17 4   Download

Purposes of the topic: To define the variation pore water pressure and deformation (settlement) of soft soil layer during vacuum consolidation. To establish the relationship between Plasticity Index (PI), degree of consolidation (U), thickness of improved soft soil layer (H), and consol.

27p dolphintaletale 23-04-2021 27 8   Download

The research using some advanced, environmentally friendly materials such as water-absorbing polymers and soil-binding polymers in potting medium is also a new direction to improve water retention. The study of manufacturing polybags with different degradation time combined with the use of SAP and PAM in substrates of pots to improve some features of the current nursery.

27p larachdumlanat129 20-01-2021 20 2   Download

Water stress periods are common in rainfed agriculture therefore the activities aimed at conserving the rainwater should be adopted for improving the productivity of dryland crops. The major crops in Vidarbha region of Maharashtra are cotton, soybean and sorghum. It was observed that the drought situation may arise during crop growth period which may result in partial failure of crops. It was therefore felt worthwhile to adopt the proper methods of in-situ moisture conservation so as to partially meet out the adverse effect of water stress in standing crop.

8p gaocaolon9 22-12-2020 20 3   Download

In this paper, physico-chemical and mineralogical properties of fly ash from Pha Lai, Mong Duong and Ninh Binh thermal power stations were studied for ultilization to improve soil properties. Results shows that the properties of fly ash depend on the nature of parent coal, conditions of combustion, type of emission control devices, and storage and handling methods.

8p nguyenvanhoangvnu 12-06-2017 37 1   Download

Research objectives: The thesis is focused on hydraulic calculation of small drainage works across of road such as: (step cascades, steep slope, velocity of soil scouring at culvert outlets and scour at culvert outlets). So that, Proposed solutions and selection methods to reinforced or choose the mitigating energy method relevant with downstream culverts on the roads; find solutions for small drainage works across the road with terrain characteristics matching the natural environment conditions and climate in Laos.

24p change03 06-05-2016 58 2   Download

The technological conditions of obtaining the polylactic acid-Vietnamese cassava starch blend on the mix-brabender were investigated. The optimal conditions were: temperature 160o C, reaction time 6 minutes, screw speed 45 r/min., initial material ratio in weight percentage PLA80- PEG10-TB20. Polyethyleneglycol (PEG) as a plasticizer, PN-47 as a distribution agent was used. It showed that the optimal starch content was 20 wt%. Increase in starch content lead to increase in water absorbability and weight loss of the materials.

7p uocvong01 24-09-2015 76 9   Download

Research objectives: Researching for improved cropping systems with proposed cropping structure on rice-based land in Dong Hy District, Thai Nguyen Province in the period of 2010 -2020; researching and applying some cultivation techniques for the tea production on hilly land in Dong Hy District, Thai Nguyen Province.

0p nguyenthiminh32 12-07-2014 79 5   Download

Microbial biomass formation on root surfaces can be measured in plants growing in solution with or without an inert solid support. Carbon flow to the biomass can be measured by growing plants in solution or soil on a continuous source of 14C02 and the expected biomass formation predicted. The lack of correlation between measured and predicted biomass can be explained by oligotrophic growth of the micro-organisms.

501p maket1311 16-10-2012 99 21   Download

Xóa đói giảm nghèo nông thôn ở Việt Nam sẽ không thể đạt được trừ khi năng lực của nông dân thông qua lợi nhuận và bền vững hệ thống nông nghiệp được tăng cường thông qua công nghệ và kiến thức sản phẩm. Việt Nam có hiệu quả mạng lưới khuyến nông quốc gia, và mạng này được chấp nhận rộng rãi nông dân như một nguồn thông tin và tư vấn. Tuy nhiên, cán bộ khuyến nông thường thiếu một cơ bản nền khoa học đất làm cho nó khó khăn cho nông dân để có được thông tin về đất bền...

4p xinh_la 01-03-2012 82 10   Download

Trees as high as 25 - 30 m, small branches, self-pruning well, easy to grow by seed, long life, nitrogen fixation. Can grow on various soils, including poor soils, poor drainage. Grows fast, high-speed growth in the first few years. Song on a place if planted several consecutive cycles can lead to poor potassium and magnesium in the soil. Pit wood, pulp (wrapping paper), chipboard and wood stem as well due to the high heat of coal. In silvicultural crops used as the supporting soil improvement, shade....

9p xau_la 10-02-2012 44 4   Download

Đào tạo trước và sau cuộc điều tra 27 đại biểu tham dự các khóa đào tạo Có một bảng câu hỏi trước và sau cuộc đua. -đi trước Thiết kế WS câu hỏi xác định những gì các thành viên tham gia coi Có chính đất contraintes productivité Tại các làng xã của họ. Câu hỏi sau cuộc đua WS được thiết kế để Bất kỳ biện pháp thay đổi nhận thức của nhân viên và contraintes đất xác định theo hành động lên kế hoạch tham gia khi họ trở về từ cuộc đua....

5p xau_la 09-02-2012 52 8   Download

Điều trị và tái chế chất thải và đất từ các ao cá ở đồng bằng sông Cửu Long để cải thiện sinh kế và giảm ô nhiễm nước

18p xau_la 09-02-2012 41 8   Download