From Appropedia

This material is copyright, and is displayed here by permission of the rights-owner(s).

It is believed that permission has been given to display this page, as open access content. However, there is no permission to release this under an open license, as far as we know. Please respect the copyright - do not reuse without the permission of the rights-holder.

This is an exception to the usual Appropedia license.

[edit] Root crops (NRI, 1987, 308 p.)

[edit] Appendixes

[edit] A. Root crop distribution on a climatic basis

Table

[edit] B. Estimated world production figures for the major root crops ('000 t/a)

		1969-71	1980-82
	average	average	average
Cassava	75 048	96 700	124 761
Potato	282 959	277 286	247 719
Sweet potato	na	142 141	141 285
Yam	18 080	16 243	19 898'

Sources: 1961-65 from Kay, 1973. TPI Crop and Product Digest No. 2.

1969-71 and 1980-82 calculated from FAO Production Yearbook 19X2.

Yams are for 1979-81: they are not quoted separately in subsequent Yearbooks. na not available.

[edit] C. Pesticides mentioned in the text

The word pesticides refers to chemicals used to combat insects, arachnids, nematodes, diseases and weeds. The following table lists the International Organization for Standardization common names of pesticides mentioned in the text, and other common names, along with their more commonly known trade names and notes on their use. The use of italics for a common name denotes that it is no longer used, or in the case of a trade name, that it is no longer manufactured.

All pesticides are hazardous and should be used strictly as recommended by the manufacturer and the local agricultural advisory service. Many countries place restrictions on the use of certain pesticides, including several listed here: some may not be permitted at all, others only if stated conditions are adhered to. Therefore mention of a particular pesticide in this digest does not necessarily imply endorsement by TDRI. There are also internationally approved recommendations and often legal limits on the level of residual pesticide permitted on fresh foods for consumption (whether home produced or imported). The legal limits vary between crops and countries and the regulations are changed from time to time. It will therefore be necessary to check the permitted pesticides and the recommended levels of application with the local agricultural advisory service, and to check the permitted residue levels with the appropriate consumer authority (particularly where there may be exports to countries with possibly different regulations).

Reference to trade names implies no endorsement of the efficacy of these products nor any criticism of competing products not mentioned.