Investigating the Potassium Fertilization Effect on Morphological and Agrophysiological Indicators of Durum Wheat under Mediterranean Rain-Fed Conditions

It is well known that balanced and optimal mineral fertilization (i.e., nitrogen, phosphorus, potassium) can increase yield improve wheat quality. However, there little scientific knowledge on the specific effect of potassium (K) morphological qualitative characteristics rainfed durum under Mediterranean conditions, especially in context Algerian agriculture. Therefore, main objective this study to provide crucial information important type nutrition for farmers researchers working similar areas. The field was conducted Northern region Mitidja during 2020/2021 2021/2022 growing seasons. K evaluated within five contrasted rates K: 0 kg k2O ha−1, 100 200 300 400 which were applied one most commonly cultivated cultivars (Simeto). Results showed increasing levels had a positive significant impact only grain yield, spike length, neck, dry matter. Hence, highest (2.58 t ha−1) demonstrated low application (100 ha−1). This rate leads an by more than 0.6 as compared unfertilized control. Moreover, thousand-grain weight significantly increased 4.11 g 1.96 g, respectively, moderate (200 K-fertilization, In terms quality, provides 1.21% protein content measured control treatment. major finding confirmed both growth indicators globally optimized application. Based agronomic traits, research revealed ha−1 recommended effective dose maximize quality sub-humid conditions.