دور بعض العوامل الفيزيائية للتربة و التسميد الفوسفاتي في انتاجية الذرة الصفراء و نموها في سهل الغاب

A pot experiment was conducted under natural conditions to determine the effect of different moisture levels (60, 70, 100%) of the field capacity, texture (clay, loam, sand), and under different levels of phosphorus fertilizer (0, 50, 75, 100 kg P2O5 / ha) on growth and P-uptake by Zea Mays. The results showed that the sandy soils gave the highest dry weight and P-uptake value to the green part and roots under moisture level 100% and under the addition of phosphorus fertilizer 100 kg P2O5 /ha. The loam soil of 100 % moisture level and under the phosphorus fertilizer addition 100 kg P2O5 /ha gave the highest value to the dry weight of the green part, roots and P-uptake. Whereas clay soil gave the highest value to dry weight of the green part under the effect of 70% moisture levels with 75 kg P2O5 /ha phosphorus fertilizer. Generally, the loam texture gave a higher dry weight and P-uptake under 100 % moisture and fertilizer addition 100 kg P2O5 / ha compared with the clay and sand texture.