The Encyclopedia
of World Problems
& Human Potential

Excessive number of crop varieties

Nature

Considerable difficulties are encountered in national seed programmes (to improve crop yields) by the excessive number of varieties recommended for cultivation. Many of the varieties recommended can only be grown in restricted areas due to sensitivity to the environment; some are also low yielding. In order to make the multiplication and distribution of high quality seed of good varieties efficient, the total number of varieties should be as low as possible. For example, in Ceylon 208 varieties of rice were grown before the number of recommended varieties was reduced to 14.

Reduces

Declining breeds of cultivated plants

Aggravates

Low-yield rice crops

Variability in crop yields ^{[in 2 loops]}

Banned cultivation of plant species

Aggravated by

Insufficient farm experiments

Value(s)

Excess

Type

(F) Fuzzy exceptional problems

About the Encyclopedia

The Encyclopedia of World Problems and Human Potential is a unique, experimental research work of the Union of International Associations. It is currently published as a searchable online platform with profiles of world problems, action strategies, and human values that are interlinked in novel and innovative ways. These connections are based on a range of relationships such as broader and narrower scope, aggravation, relatedness and more. By concentrating on these links and relationships, the Encyclopedia is uniquely positioned to bring focus to the complex and expansive sphere of global issues and their interconnected nature.

The initial content for the Encyclopedia was seeded from UIA’s Yearbook of International Organizations. UIA’s decades of collected data on the enormous variety of association life provided a broad initial perspective on the myriad problems of humanity. Recognizing that international associations are generally confronting world problems and developing action strategies based on particular values, the initial content was based on the descriptions, aims, titles and profiles of international associations.

About UIA

The Union of International Associations (UIA) is a research institute and documentation centre, based in Brussels. It was established in 1907, by Henri la Fontaine (Nobel Peace Prize laureate of 1913), and Paul Otlet, a founding father of what is now called information science.

Non-profit, apolitical, independent, and non-governmental in nature, the UIA has been a pioneer in the research, monitoring and provision of information on international organizations, international associations and their global challenges since 1907.

www.uia.org

You are here

Excessive number of crop varieties

About the Encyclopedia

About UIA