What evidence exists for the effectiveness of on-farm conservation land management strategies for preserving ecosystem services in developing countries? A systematic map

Table 6 Three most frequently studied crops compared to area cultivated globally

Most frequently studied crops	% studies	No. studies	% of global cultivated area^a	2014 global acreage (m. ha)	Source
Maize (Zea mays)	18.5	285	12.3	184	International service for the acquisition of agri-biotech applications, 2014
Rice (Oryza sativa L.)	11.9	183	10.7	160.6	US Dept Agric, Statistica 2015
Wheat (Triticum)	9.9	152	14.3	215	CGIAR 2015

The table shows the proportion of studies on three staple crops in relation to the proportion of land cultivated globally (shown in italic)
^aTotal cultivated area of crops is 1500 mha [3, 52, 53]

ISSN: 2047-2382