One effort to reduce nitrogen loss is make the fertilizer in a form of slow-release. SRF method can be done conventionally based on centrifugal force. Nitrogen release from UZA fertilizers generally decreased during incubation period. Urea slow-release combination zeolite and humic acid applied soil media rate nitrate release. In this case, it necessary identify effect ready modifying acid. Inc...

Nitrogen is the most important essential nutrient that plays a major role in achieving maximum crop yield in agriculture. Therefore, nitrogen fertilizers such as ammonium sulfate and urea have been extensively used in modern agriculture. These fertilizers are generally oxidized to nitrate via nitrite by nitrifying microorganisms in the agricultural field (4, 10, 11). The serious environmental p...

urea is the most common form of nitrogen fertilizer used in sugar beet cultivation. urea has a high solubility and its losses are high and consequently its efficiency is low. it is supposed that urea solubility can be limited and its efficiency can be increased by using slow-release nitrogen fertilizers. by conducting an experiment in three important sugar beet cultivation areas of khorasan pro...

Research on the effect of cellulose and kaolin addition to alginate-cellulose-kaolin composites' characteristics as a slow-release agent urea fertilizer has been done. The technique used in preparation is an extrusion using 2% CaCl2 solution cross-linker. compositions were varied determine their such diameter, color, swelling ratio, entrapment efficiency, release urea. results showed that diame...

Various N fertilizer sources are available for lawn turf. Few field studies, however, have determined the losses of nitrate (NO(3)-N) from lawns receiving different formulations of N fertilizers. The objectives of this study were to determine the differences in NO(3)-N leaching losses among various N fertilizer sources and to ascertain when losses were most likely to occur. The field experiment...