One has to be aware that only a few countries in the world conduct surveys on the extent of no-tillage adoption and that in most cases the data is based on estimates made by farmer organizations, agro industry and others. Table 1 shows the estimated area under no-tillage worldwide.
Source: Derpsch, R. and Friedrich, T., 2010
Information provided by: 1) CTIC, 2007; 2) AAPRESID, 2010; 3) FEBRAPDP, 2005/06; 4) Australian Bureau of Statistics, 2009; 5) Dr. Doug McKell, Soil Conserv. Council of Canada, 2006; 6) MAG & CAPECO, 2008; 7) Li Hongwen, 2008; 8) Mekhlis Suleimenov, 2007; 9) ANAPO, Bolivia, 2007; 10) ) Miguel Carballal AUSID, 2007; 11) Emilio González-Sánchez, AEAC/SV, 2008; 12) Richard Fowler, 2008; 13) Rafael E. Perez, 2004; 14) APAD, 2008; 15) Timo Rouhianinen, FINCA, 2008; 16) Carlos Crovetto, 2008; 17) John Baker, 2008; 18) Fabio Leiva, 2008; 19) Estimate by the authors.
Readers of this paper, who think that their countries should be mentioned in this list, or that some numbers should be corrected, are invited to contact the author giving credit of the sources of the information. Internationally accepted definitions of no-tillage should be used.
to previous sources there would be 650,000 ha of no-tillage in Mexico. But
this estimate was based on the number of no-till machines sold which was
multiplied by average farm size. Newer data by CIMMYT showed that this system
greatly overestimated the area under this practice.
Published in: Derpsch, R. & Friedrich, T., 2009. Global Overview of Conservation Agriculture Adoption. Proceedings, Lead Papers, 4th World Congress on Conservation Agriculture, 4-7 February 2009, New Delhi, India, p 429-438.
The Knife Roller A new development for permanent cover cropping systems
Green Manure Cover Crops
(GMCC's) and crop rotation are the key factors for the unprecedented growth of no-tillage
especially in Brazil and Paraguay. Linked to the spread of cover crops is the use of a Knife
Roller to flatten cover crops. This implement is not terribly expensive and in many cases can
be made locally or by the farmer himself. The implement can be pulled by medium sized tractors
or the smaller version by animal traction and has contributed a lot in reducing herbicide rates
in the no-tillage system. The Knife Roller has become an essential tool for managing GMCC's in
many countries of South America. The knives should not cut the plants but just smash the stems,
in order to impede water circulation in the plant. It has been a big error of many manufacturers
to make the implement with sharp knives. In this case knives penetrate into the soil enhancing