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close this bookAbstracts on Sustainable Agriculture (GTZ; 1992; 423 pages)
Open this folder and view contentsAbstracts On Traditional Land-Use Systems
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close this folderAbstracts on seed production
View the documentAcknowledgements
View the document1. Good quality bean seed.
View the document2. A pocket directory of trees and seeds in Kenya.
View the document3. Seed production of agricultural crops.
View the document4. Seed potato systems in the Philippines: a case study.
View the document5. Seed enrichment with trace elements.
View the document6. Current practices in the production of cassava planting material.
View the document7. Alternative approaches and perspectives in breeding for higher yields.
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4. Seed potato systems in the Philippines: a case study.

International Potato Center, Lima, Peru; ISBN 92-9060-136-1, 1989, 82 p.

This report is one of a series of case studies on seed potato systems in selected countries. The main objective of the individual case studies is to identify strengths and weaknesses in organized seed potato programs.

To do this effectively, the organized potato program must be examined in the context of its environment. Thus a systems approach is adopted in these studies to categorize and evaluate the role of an organized program within the larger seed system.

Potato production in the Philippines is centered in the high and mid-elevation areas of Benguet and Mountain Provinces in the agricultural region of Ilocos in Northern Luzon.

The data show a rapid expansion in production during the last ten years at an average annual rate of 8.3%. Most of that growth is explained by expansion in area and the rest is due to changes in yield.

The government efforts have centered on a cooperative project with the German government to establish a seed production scheme in the highlands of northern Luzon.

The concept of system used in this study stresses function rather than structure as the basic device by which to classify the system parts.

Special attention is paid to linkages between the different agencies which have roles in the organized seed programs and the linkages between these agencies and the informal farmer-based seed system.

The format of the report proceeds from the general to the specific.

First there is a brief discussion of trends in the potato sector and the potato in the Philippine food system in terms of production, consumption and marketing. Next is a presentation of the larger elements which influence the seed system, the physical and socio-economic environment and the government. An overview of the RP German seed potato project is presented in the discussion of government activities.

After this overview the discussion follows the chain of activities found in the Philippine seed system. These steps are:

- provision of adequate varieties

- the initial creation of seed supplies, a step crucial for overcoming the slow rate of reproduction while moving from foundation material to sufficient quantities of basic seed, and

- the building of seed supplies, which includes the organization of farmer cooperators for bulk multiplication but also for quality control.

- Next the work of the private sector is discussed, the components of crop protection and storage are introduced, and an overview and discussion of results are presented.

The gradual build up of diseases in seed stocks obliges farmers to replace their seed stock periodically. In the absence of widespread certified seed, the source of the replacement seed requires careful consideration. In developing countries this usually means that seed from higher altitude zones would be preferred. Thus there often exists a distinctive flow of seed from one location to another. Once on the farm, the farmer can use various methods to slow the rate of degeneration of the seed. These methods include proper post-harvest handling and storage, field or post-harvest selection, and pre-planting treatment.

1191 92 - 9/38

Seed production

Latin America, Brazil, study, field trials, maize, field bean, trace elements


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