Abstract

A field study was conducted in the Al-Jazeera region- Al-Khalidiah -Alanbar governorate, on the line along, 43.31.3 ̊ east and latitude 33.25.16 north during 2013 autumn season, in clay loam soil texture, a med at Determining the optimum distance between exhalants 0.40, 0.80 and 1.20 m and its effect on some soil physical properties , water consumptive use and and yield of cauliflower Brassica oleracea var. botrytis the experiment design was randomized complete block with treatments with three replications, and the result showed that:
Reducing the distance between the exhalants was led in homogeny of soil moisture distribution which reflected positively on yield but there were not significant increases between the treatments of 0.40 and 0.80m also the kc value for four growth stages was 0.80, 0.81, 0.83 and 0.75 and the total yield was 39.33 and 38 tonne.ha-1 respect to the distance 0.40 and 0.80 without significant differences , where there was a significant difference with value the distance 1.20m was 24.7 tonne.ha-1, also increased the dry mass has been significantly increased, which gave59.3 gm.plant-1 in comparison with 57.0 and 45.2gm.plant-1 , at the other two distances 0.80 and 1.20 m respectively, The 0.40m distance treatment was superior comparing with other as well as the same thing happened for water use efficiency which gave 40.7 and 39.29 kg.m-3 at 0.40 and 0.80 m distances respectively without significant differences in comparing with 1.20 m distance which gave 25.5 kg.m-3 also the use of Exudation irrigation led to decrease water consumption for the crop which gave 172mm comparing with 289.35 as average for preceding researches.