Akademik Veri Yönetim Sistemi
INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY, cilt.11, sa.4, ss.483-494, 2009 (SCI-Expanded)
Agriculture has a central role in the life of Turkish people. According to the most recent statistics, the share of field crops within total agricultural production in Turkey is 15.5% of which, 7.1% is from vegetable and fruit production. Cereals, industrial, tuber, oil seeds, pulses and odder and forage have 44.0, 20.0, 8.1, 4.0, 2.0 and 0.01-12.80% contribution, respectively. During the period, 1925-2006 the yields of many field crops declined. For example, the comparative production level (PL) of some field crops (as a percentage of 1925 levels) was recorded as: flax (Linum spp.) 50,032 t (99%); green lentils (Lens spp.) 157,674 t (79.9%); soybeans (Glycine spp.) 152,700 t (76.4%); broad beans (Vicia spp.) 58,684 t (73.4%); tobacco (Nicotiana spp.) 70,343 t (44.4%); sesame (Sesame spp.) 18,455 t (41%); green hay in sainfoin (Onobrychis spp.) 85,157 t (40.1%); rye (Secale spp.) 79,000 t (23%); alfalfa (Medicago spp.) 390,080 t (17.7%); chickpea (Cicer spp.) 78,254 t (12.4%) and red lentil (Lens spp.) 69,702 t (11.0%). In 2007, climate change negatively influenced area under field crops. According to statistical estimates, these areas were estimated as 15.5% (in cereals); 8.4%-36.7% (in pulses); 3.2% (in tubers) and 23.6% (in oil seeds). It may be suggested that this pathetic panorama results entirely from the negative impacts of many restrictive factors on plant growth and development in the agricultural sector. There are a number of reasons why meteorological factors may have influenced yield positively or negatively, but it is certain that accelerated development was reduced of crop yield level.