Recovering and recycling phosphorus (P) from sewage sludge ash (SSA) for the purpose of P fertilizer production contributes to reducing input mined phosphate-minerals closing cycle. However, direct use SSA as is often a questionable strategy due its low nutrient efficiency. In addition, environmental risk potential utilizing in agriculture still unclear, particular toxic element (PTE) contamina...

The 'phosphorus problem' has recently received strong interest with two distinct strands of importance. The first is that too much phosphorus (P) is entering into waste water, creating a significant economic and ecological problem. Secondly, while agricultural demand for phosphate fertilizer is increasing to maintain crop yields, rock phosphate reserves are rapidly declining. Unravelling the me...

   A biological experiment was carried out for the purpose of knowing effect type organic matter, source and level phosphorous on growth yield corn (Zea mays L.) in gypsum soil.  The one agricultural fields Salah al-Din Governorate / Al-Alam district year 2019. study included three factors (type fertilizer, level).  factor fertilizer (not adding Z, compost K sheep waste S), ...

Nitrogen management practices have an effect on crop yields but they can also have a negative impact on the environment. Practices such as banding fertilizer and/or split-applying total nitrogen needs per acre offer a more efficient use of nitrogen by significantly reducing nitrate leaching potential. Heavy rains occurring when plants are small and nitrogen demands are low can also increase nit...

Semi-intensive production of Nile tilapia Oreochromis niloticus commonly utilizes organic and inorganic fertilizers to increase primary production and fish yield. Most experiments on such systems are done at fish culture stations where water supplies are readily available, and water loss through evaporation or by seepage is replaced regularly, often weekly. Rainfall during such experiments may ...