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 3 Number of studies for each of the five different types of fertilisation intervention identified

Type of fertilisation intervention	Number of studies	Percentage of total
Rate of fertilisation	44	44
Type of fertiliser	27	27
Application location	10	10
Mode of application	13	13
Others	5	5
Total	101	100%

ISSN: 2047-2382