استجابة نمو و حاصل ثلاثة أصناف من الشعير (Hordeum Spp. )‎ لنظم الحراثة

Abstract EN

Afield experiment was carried out in growing season (2020-2021) in two locations, The first Al- Hamdaniya, which far away (15) km southeast of the city center of Mosul and the second in the Namrood location (65) km east of the city center of Mosul, to study growth and yield of three cultivars of barley (Hordeum spp.

) response to tillage systems.

The experiment was designed according to an experiment system within (split-plot).

using a completely randomized block design (R.

C.

B.

D) with three replications.

The experiment included two factors, 1- Three cultivars of barley: ( Aswad mahly – zanbaga and Samer ) 2-Three tillage systems, Zero tillage (ZT), Single plow farming– Two plows with seeding, Conventional tillage(CT) The most important esults could be summarized as follows: 1- cultivars differed significantly in studied characters for both locations, Aswad mahly cultivar superior significantly in most characters while Zanbaga surpass in spike length 2-Zero tillage superior in all characters for both locations except the weight of seeds and number of seeds in spike.

The two –plows method is superior to the one – plows method in number of seeds in spike and grain yield in the two location While sowing with one plows superior in the number of spikes.

3-The interiaction between cultivars and tillage systems shows superior Aswad mahly with Zero tillage in number of spike.

m, grain yield and Aswad mahly with Two plows in number of seed /spike and seed weight in spike in the two location while zanbaga superior in spike length.

While the lowest values shows in Samer with one plow.

*part of ph.

D.

Thesis.

athesis submitted by the first author.