الفهرس Only 14 pages are availabe for public view
 |  | from | 86 |  |  |
| | | from | 86 | | |
Abstract
INTRODUCTION
Potassium (K) is characterized by high mobility in plants, however, K uptake by plants is highly selective and closely coupled with metabolic activity (Marschner, 1995). Potassium has important roles in enzyme activation, osmoregulation and carbohydrate translocation in plant cells (Luttge and Clarkson, 1989). Mengel and Arneke (1982) found that plants react to inadequate K+ nutrition first of all in their water economy and next in the formation of dry matter. Potassium deficiency may be occurs in calcareous and alkali soils specially sandy and newly reclaimed soils. Thus, the application of potassium fertilizers in considered of a paramount important for increasing yield production of all crops raised on these soils.
Water is considered as an essential component of sustainable agricultural development. Without appropriate and reliable water control and management, maintaining agricultural developing is simply not possible. The increase in yield per every unit of water is considered the national aim in both old and new lands in Egypt.
Wheat (Triticum aestivum, L.) is considered one of the most important winter crops for human consumption in Egypt. The productivity of wheat is affected by many factors among which fertilization by macro and micronutrients are most prominent.
In the newly reclaimed sandy and calcareous soils, increasing soil