Fig. 4From: 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 mapa Number of relevant studies addressing field-grown tomato yield in response to conditions of water, nitrogen (N), and/or phosphorus (P) deficit. b. Number of interventions reporting an impact on either resource- ‘Availability’,-‘Uptake’, and/or -‘Use-Efficiency’Back to article page