An Assessment of the Impacts of Agro-Ecological Practices towards the Improvement of Crop Health and Yield Capacity: A Case of Mopani District, Limpopo, South Africa

World Academy of Science, Engineering and Technology, International Journal of Environmental and Ecological Engineering Pub Date : 2016-12-01 DOI:10.15242/iicbe.c1216055

T. Manyanya, N. Nethengwe, E. Kori

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Abstract

Agro-ecology has emerged as a front runner in food security and sovereignty, with the UNFCCC and FAO advocating its global adoption. Agro-ecological implementation is theorised to increase crop health and yield by 3 – 10 % in a space of 3 – 10 years. This study aimed to assess the practicality and validity of these assumptions using mainly GIS and remote sensing. Adopting a mixture of Ex-post-facto and Experimental designs necessitated the presence of a control element. Each agro-ecological farm was thus assessed and compared with a conventional farm in the same geographical conditions. Crop health was assessed using satellite images analysed through ArcGIS to produce NDVI and Re-classified outputs whereas yield was calculated from production records. The shift in NDVI-crop ranges indicates changes in crop health over time. Crop health and yield both showed a decrease over 80% of the conventional farms and an increase over 80% of the organic farms. Keywords—Agro-ecology, Agro-ecosystem, Anthropogenic,

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农业生态实践对提高作物健康和产量的影响评估:以南非林波波省莫帕尼区为例

农业生态已成为粮食安全和主权领域的领跑者，《联合国气候变化框架公约》和粮农组织正在倡导全球采用该公约。从理论上讲，农业生态实施可以在3 - 10年内使作物健康和产量提高3 - 10%。本研究主要利用地理信息系统和遥感技术来评估这些假设的实用性和有效性。采用事后设计和实验设计的混合设计需要控制元素的存在。因此，对每个农业生态农场进行了评估，并与相同地理条件下的传统农场进行了比较。利用通过ArcGIS分析的卫星图像评估作物健康状况，以产生NDVI和重新分类产出，而根据生产记录计算产量。ndi -作物范围的变化表明作物健康状况随时间的变化。作物健康和产量均显示，传统农场的产量下降了80%以上，有机农场的产量增加了80%以上。关键词:农业生态学;农业生态系统;人为;

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World Academy of Science, Engineering and Technology, International Journal of Environmental and Ecological Engineering

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