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Tropical crop–livestock systems in conservation agriculture

The Brazilian experience








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    Paraguay: Financial and Economic Implications of No-tillage and Crop Rotations Compared to Conventional Cropping Systems
    Occasional Paper N. 9 - July 1997
    1997
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    The introduction of soybeans to the southern and eastern parts of Paraguay in the early 1970s, followed by wheat in the mid-1970s, using conventional mechanised soil preparation practices with disc ploughs and harrows, initiated a process of widespread soil degradation and erosion. The technique of no-tillage was first used in Paraguay in the late 1970s. Following a slow start, its adoption by Paraguayan farmers gathered momentum increasing from 20,000 ha in 1991/92 to an impressive 250,000 ha i n 1995/96, accounting for about 19% of the land cultivated mechanically. In 1993, the Ministerio de Agricultura y Ganadeira (MAG) and the Deutsche Gesellschaft fur Technische Zusammenarbeit (GTZ) started a project aimed at adapting and further disseminating no-tillage in combination with rotations of both cash and green manure crops in the major grain producing departments of Paraguay. Since very little was known about the economics of these technologies in Paraguay, MAG in association with GTZ, initiated a detailed study which was guided by the FAO Investment Centre. In this paper, the findings of the study are summarised and discussed.
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    Tillage systems for soil and water conservation
    FAO Soils Bulletin No. 54
    1984
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    The increasing world population is resulting in intensified cropping of the limited areas of arable land to provide the necessary food in some countries. Unless effective conservation practices are used, such intensive cropping tends to increase the loss of soil and water resources. This trend must be reversed. The objectives of the Soils Bulletin are to present the principles and practices if tillage systems for sustained food production and to create an awareness of the need to conserve the world?s soil water energy resources for future generations. Although energy is an integral part of tillage systems, the emphasis is on soil and water conservation. This bulletin emphasizes tillage systems for developing countries, but relies heavily on principles that have been developed throughout the world. The need for more research on conservation tillage in developing countries is stressed.
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    LESOTHO: A Note on the Machobane System
    Occasional Paper N. 7 - September 1996
    1996
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    This note on the Machobane system is based on information gathered by an FAO Investment Centre mission which visited Lesotho in July 1996 on behalf of the Government and the International Fund for Agricultural Development, to prepare the ground for the formulation of a Sustainable Mountain Agriculture Programme for possible IFAD financing. Observations of farmers attitudes and behaviour as well as relevant socio-economic data were collected in February 1996 in several villages of two Districts i n Lesotho and are presented. See also the related FAO Investment Centre Occasional Paper N. 6 "Assessing the Adoptability of Improved Crop Production Technologies by Small Farmers: the Case of Lesotho".

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