MATERIALS AND METHODS
This study was carried out under field conditions in Tokat during
2006 to 2007 growing seasons. Tokat is located between 40°19'07''
north and 36°33'11'' west coordinates with an altitute of 610 meters.
Annual vegetable production of Tokat is about one million tons.
Fertilizers
The organic fertilizers used in this study are Ormin K (OK), Coplex
(CO) and Nof. Additionaly, composted poultry manure (CPM),
composted cattle manure (CCM) and inorganic fertilizers (Control)
were also used. During the field trails different doses of organic
fertilizers were tested in 2006 to 2007. The fertilizers and their
doses used in 2007 were determined after evaluation of first year
data. The organic fertilizers used in this study and their contents
were given in Table 1. Dosage and application times of fertilizers
were showed in Table 2.
Plant materials
Tomato cultivars used in this study were Alida Fı (Zeraim Gedera
Seed Co) in 2006 growing period and Yankı Fı (Đstanbul Seed Co),
Maya Fı (May Agro Seed Co) and Alida Fı in 2007 growing period.
Tomato seedlings were planted with 50 cm narrow row and 120 cm
wide row spaces and 40 cm spacing between plants (29400
plants/ha). Plants were trained with single stem and trimmed after
eighth cluster. Organic and chemical pesticides and fungucides
were used in organic and inorganic fertilizer plots respectively for
control diseases and pests.
The tomato fruits were separated into three quality classes
according to UNECE Tomato Standards as extra class yield, first
class yield and second class yield after each harvest (Anonymous,
2009). The total marketable yield, early yield (first 8 harvest),
average fruit weight, unmarketable yield, distribution of yield to the
quality classes and rate of cracked fruit were determined.
Statistical analysis
The effects of fertilizers and cultivars were analysed using ANOVA,
with means seperated by the LSD test (P≤