Spelling suggestions: "subject:"far manure -- south africa""
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Biomass response of selected African leafy vegetables in pots to rate of application of three types of animal manure.Okorogbona, Alfred Oghode Misaiti. January 2011 (has links)
Thesis (MTech. degree in Agriculture)--Tshwane University of Technology, 2011.
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Applications of dairy wastewater as a fertilizer to agricultural land : an environmental management perspectiveTorr, Leigh Christine 03 1900 (has links)
Thesis (MSc (Geography and Environmental Studies))--University of Stellenbosch, 2009. / As with any form of intensive agriculture, there are potential environmental impacts
associated with the management and housing of livestock on dairy farms. Within the
field of dairy farming, particular focus falls to the issue of environmental degradation
of water resources, as this form of pollution is currently a major environmental issue
around the world. Conventional agricultural practices involving the application of
chemical fertilizers to land and crops are causing environmental problems as a result of
poor management practices. Dairy wastewater and manures could however be a
valuable resource for agricultural producers in the form of an alternate fertilizer for
their crops. Waste application as a fertilizer is more environmentally friendly than
chemical fertilizers, and could drastically reduce costs for farmers, whilst alleviating
storage and management problems often associated with farmyard manures (FYM).
The application of organic wastes, notably livestock manures, to land has historically
been important for maintaining soil fertility on farms in terms of nutrient status and
organic matter levels, as well as helping to reduce soil erosion and improve waterholding
capacity. The research sought to investigate the environmental and economical
feasibility of using dairy wastewater and manures as an alternative form of fertilizer
within agriculture in South Africa.
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Biochar and poultry manure effects on selected soil physical and chemical properties and maize (Zea Mays) in a dry environmentMusumuvhi, Thabelo 18 May 2018 (has links)
MSCAGR (Soil Science) / Department of Soil Science / Poultry manure (PM) is an inexpensive source of fertilizer but it decomposes quickly and releases carbon and greenhouse gases. Biochar (BC) could be an alternative source of carbon to improve soil quality and reduce greenhouse gas emission. This study investigated the effect of co-application of BC and PM on selected soil physical and chemical properties and performance of maize. A field experiment was conducted at the University of Venda experimental farm during 2015/2016 and 2016/2017 seasons. The experiment was a 4 x 3 factorial arrangement consisting of four rates of BC (0, 5, 10 and 20 t ha-1) and three rates of PM (0, 2, and 4 t ha-1) in a RCBD arrangement replicated three times. Maize was planted in both seasons. After harvest, soil bulk density was determined at four soil depths (0-5, 5-10, 10-15, and 15-20 cm), while aggregate stability and selected soil chemical properties were determined at two soil depths (0-15 cm and 15-30 cm). Data were subjected to ANOVA using Genstat 17th edition. The least significant difference was used to compare the treatment means at P < 0.05. Soil aggregate stability, organic carbon, Ca2+, Mg2+, K+, maize dry matter and maize grain yield increased with increasing rates of BC and PM application at 0 - 15 cm depth in both seasons. The combination of BC at 20 t ha-1 and PM at 4 t ha-1 significantly (P < 0.05) decreased soil bulk density at 5 - 10 cm depth but increased soil available P and total N at the two depths in both seasons. The results of this study suggested that BC and PM improved soil ability to retain and supply nutrients through improved soil aggregate stability and reduced bulk density thereby improving maize dry matter and grain yield. Combining BC with PM proved to enhance the ability of soil to function by improving selected soil physical and chemical properties thereby improving maize dry matter and grain yield. / NRF
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