Response of some durum wheat genotypes (Triticum durum Desf.) for Potassium fertilization levels in newly reclaimed soil.

The proper amount of fertilizer application is the main factor affecting grain yield and its components durum wheat. Hence, field experiment was carried out in winter seasons 2017/2018 2018/2019, at Research Farm Faculty Agriculture, Sohag University, to study effects potassium levels (zero, 25, 50 75 kg K2O /fed.) on four wheat genotypes (Bani Suef 6, NGB 7214, 5399 4816). A randomized complete block design (RCBD) used split-plot with three replicates. results showed that were significantly affected all studied characters except plant height 1st 2nd seasons, harvest index season only, as well had effect traits both growing seasons. Bani 6 7214 produced highest values compared other Moreover, accession maximum spike length (cm), No. Spike /m2, grain/spike, 1000-grain weight (g), biological (ton/fed.) straw respectively. In general, (20.27 19.70 ard./fed.) obtained by genotype when fertilized /fed., /fed. interaction treatments,