Two field experiments were conducted at the Experimental Farm of Faculty of Agriculture (Saba Basha), Alexandria University, Egypt during 2017 and 2018 seasons, to study the response of the three maize hybrids productivity to different combination between nitrogen and potassium fertilizer and its effect to infection by fungal diseases. Split plot design with three replications was used, where the main plots occupied by three hybrids of maize (S.C.10, S.C.131 and T.W.C.321), meanwhile the subplots contained combination between nitrogen and potassium fertilizer forms (192 kg N/ha + 0 kg K/ha, 192 kg N + 57.6 kg K/ha, 192 kg N + 115.2 kg K/ha, 288 kg N/ha + 0 kg K/ha, 288 kg N + 57.6 kg K/ha, 288 kg N + 115.2 kg K/ha, 384 kg N/ha + 0 kg K/ha, 384 kg N + 57.6 kg K/ha, and 384 kg N + 115.2 kg K/ha). Each subplot consisted of 6 ridges 3.50 m in length and 70 cm in the width and plot area was 14.7 m 2. The results revealed that maize hybrids differed significantly and combination between nitrogen and potassium fertilizer affected significantly in plant height (cm), ear length, number grains/row, number of grains/ears, 100-grain weight, grain, straw, and biological yield (kg/ha.) as well as harvest index %. The results indicated that there was significant effect of fertilization levels on yield, its components and leaf blight infestation of some maize hybrids where fertilizing maize hybrid TWC321 by 288 kg N + 57.6 kg K/ha recorded the highest values of yield and its components, on the other hand, the maize hybrid TWC321 recorded the highest yield and high tolerant for leaf blight under Alexandria conditions.

Two field experiments were conducted at the Rosetta region, El_Behira Governorate, Egypt, during 2017/2018 and 2018/2019 growing seasons to study the effect of water quality, fulvic acid and seaweed extracts on the yield, its components and quality characters of wheat plant (Giza 168), in split-split plot design with three replications. The main plots included irrigation water quality (Nile water and Agricultural drainage water), while seaweed extracts (control, 50 and 100 g SW/fed) was arranged in the subplot. While fulvic acid application (control, 1, 2 kg FA/fed) occupied the sub-subplot. The results concluded that application of water quality, seaweed extracts and their interaction affected significantly wheat yield and its components, where yield and its components of wheat crop increased with using Nile water (high quality water), or drainage water with foliar application of seaweed extracts (SWE) at the rate of 100 g/fed and soil application of fulvic acid at the rate of 2 kg/fed

No abstract

The northwestern coast of Egypt is one of the most important grazing areas in the country, with a natural rangelands area of about 2.3 million hectares. Rangelands in this area have been facing overgrazing and mismanagement for years, so rehabilitation and restoration approaches are urgently needed for the sustainable development of these rangelands. Hence, this research was conducted at Wadi El-Washka, El-Kaser Region, Northwestern Coast, Marsa Matrouh Governorate, Egypt, in 2017 and 2018 growing seasons to study the effect of compost manure rates on the growth parameters of three forages shrubs species. The experimental design of the experiment was split-plot design with four replications. The main plots included the three shrubs species (Medicago arborea, Periploca angustipholia, and Atriplex nummularia), while compost rates (0, 5, and 10 t/fed) in the subplot. The results concluded that the different shrubs significantly differed under increasing the rate of compost manure. In this respect fertilizing Atriplex nummularia by addition compost at the rate of 10 t/fed as organic manure increased all growth characters including, shrub height of 119.40 and 126.08 cm, number of branches/plants of 11.08 and 11.73 branches, crown coverage of 0.929 and 0.506 m 2 and crown volume of 0.363 and 0.260 m 3 in spring and autumn growing seasons of 2017 and 2018, respectively under study conditions at northwestern coast of Marsa Matrouh Governorate, Egypt. These findings would have management implications for the better use of untraditional water resources for the sustainable development of degraded desert rangelands.