Abstract
This research contain two studies aiming at investigation the effect of seed grading, seed rate and zero tillage planting method on growth, yield and its components of Durum Wheat ( Triticum durum DESF.)
The first study includs the effect of seed grading and seed rate. The grading factor included three levels:- ( 79.0, 80.5, and 81.5 kg/hectoliter). the first level represented control treatment (un grading). the second level represented grading (Grade b). the third level represented grading (Grade a). second factor are three levels (200, 300, 400 seed/m2). the seeds were sown by (Z.T.) method in two neighboring fields. the first field was sown last year by using ( supplementary irrigation) . the second field was (rain fed). the two fields sown depending on rains. the results showed that the seed levels (400, 300 seed/m2) had a predominant effect in increasing the number of tillers, spikes per square meter, the number of seeds per spike, grain yield, and the straw biomass (kg/m2) for the two fields. also increasing the leaf area in the second field. as for the levels of gradation (Ga, Gb) the results showed significant increasing in the number of tillers, spikes per square meter, and grain yield for the two fields. leaf area and weight of 1000 grain increased in the second field compared with control treatment (un grading). The interaction between seed rate (300 seed/m2) with grade (Gb) realized best quantitative and economic yield for the two fields where no significant difference with grade (Ga) despite the differences in seed rate (kg/donum).
The second study included the comparison between the (Z.T.) with convential tillage (farmer method) in the morphological and productivical traits for wheat. the results showed that there is no difference between (Z.T.) and convential tillage in the number of tillers, the number spikes per square meter, weight of 1000 grain, and the height of the plant; while the (Z.T.) was higher than the convential tillage in the number of seeds per spike, grain yield, and straw biomass (kg/m2).
