What evidence exists on the effectiveness of the techniques and management approaches used to improve the productivity of field-grown tomatoes under conditions of water-, nitrogen- and/or phosphorus-deficit? A systematic map

Table 2 Number of studies and their relative proportion of relevant records that reported on the use of either 1, 2 or 3 interventions to improve the productivity of field-grown tomatoes under conditions of water-, nitrogen- and/or phosphorus-deficit

Number of intervention report	Number of articles	Percentage of total
1 Intervention	147	50
2 Interventions	120	41
3 Interventions	24	8

ISSN: 2047-2382