Xem 1-7 trên 7 kết quả Agro ecosystems
  • Herbicides are much more than just weed killers. They may exhibit beneficial or adverse effects on other organisms. Given their toxicological, environmental but also agricultural relevance, herbicides are an interesting field of activity not only for scientists working in the field of agriculture. It seems that the investigation of herbicide-induced effects on weeds, crop plants, ecosystems, microorganisms, and higher organism requires a multidisciplinary approach. Some important aspects regarding the multisided impacts of herbicides on the living world are highlighted in this book.

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  • If better management (BMP) was adopted in Vietnam there is evidence that the current trends and past environmental degradation can be stopped and even reversed, and shrimp production efficiency can be increased.

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  • The history, culture and community values of East Africans are embedded in agriculture. It is the most important source of livelihoods for millions of East Africans. The sustainable management of the agriculture production process is therefore crucial if livelihoods are to be sustained. Organic agriculture is a holistic production management system, which promotes and enhances agro- ecosystem health, including bio-diversity, biological cycles and soil biological activity.

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  • Agricultural development is widely recognized as crucial for poverty reduction. At the same time, agricultural expansion and ever more intensive practices are widely recognized for their contribution to ecosystem degradation. Less well recognized is that, in many cases, agriculture offers the potential to generate both poverty reduction and better environmental outcomes. The studies presented in this volume look at one policy tool that may address this gap: payments for environmental services (PES).

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  • Biofertilisers are defined in this application as microbial inoculants, isolated from soil or the rhizosphere of plants, assisting the mobilisation of soil nutrients such as N and P and others in the plant rhizosphere and thus promoting the growth rate and yield of plants. Successful biofertilisers can contribute to increases in food production in a highly sustainable manner, with economic and environmental advantages.

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  • The ecosystem of the lake is under threat due to the rise in human population density leading to intensive irrigation, farming, land subdivision, and intensive use of agro- chemicals and deforestation around the lake. The growth of the township has also led to more runoff, siltation and nutrients being discharged into the lake via inflowing rivers and drainage channels along roads and the other infrastructure. Inadequately treated effluents from the ton's sewage treatment plan are also finding their way into the lake.

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  • The study area is located on an ecosystem that is of low carrying capacity and as such this has necessitated excessive use of agro-chemicals to enhance productivity. The effects from these practices is that the chemicals find their way into the lake through runoff from the agricultural parcels of land. Because the land generally slopes towards the lake. Poor tillage practices often result in soil erosion and the loose soil is carried awash into the lake. All these result in increased eutrophication of the lake’s waters.

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