TO CLARIFY THE EFFECTS OF TRADITIONAL AND DIRECT PLANTING ON SECONDARY PRODUCT CORN'S PRODUCTIVITY AND WATER CONSUMPTION
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This study is carried on to clarify Traditional Planting and Direct Planting's effects on growth, water consumption and productivity in secondary corn product. On the trial that set up as random parcels, Pioneer 3394 corn variety is used. During the irrigation season, corn crops grown with TP and DP methods are watered 450 and 397 mm. Number of irrigation are 7 in both methods. With DP method 13.4% water saving is provided according to TP method. In Turkey on 9.87 million of deacres land where corn is produced choosing DP method instead of TP method, will save 522.9 million tons of water. Crop water consumption (ET) is calculated as 647 mm depending on soil samples. Plant height is measured as 207 cm on TP method, and 204 cm on DP method. Plant height and a year's day numbers consisting of growth period are used to obtain plant height growth model. Average leaf number is 16 in both TP and DP methods after the crop growth season. Average productivity is 1070 kg da(-1) in TP method and 1048 kg da(-1) in DP method. Depending on the study results, there are no differences in crop growth and productivity, between TP and DP methods (P>0.005). In DP method, under favour of mulch leftovers from primary product, soil surface preserves humidity better and doesn't need irrigation water for longer terms. Choosing DP method, will prolong the irrigation interval, provides less usage of water and reducing demand for cultivation, that means reduces main costs of agricultural jobs like irrigation water and labour costs.