Denitrification has been proposed to be a major N loss mechanism from flooded systems, but direct measurement of the N, product has met with little success. A laboratory experiment was undertaken to determine if N-labeled dinitrogen gas was encapsulated in the saturated soil after applied N was denitrified in a Crowley silt loam (Typic Albaqualfs) soil. Under laboratory conditions, 28% of the a...

In most ecosystems, nitrogen is a scarce and growth-limiting nutrient. Natural and anthropogenic processes convert unreactive atmospheric dinitrogen (N2) into reactive, bioavailable, nitrogen. This conversion occurs mainly through biological nitrogen fixation (BNF), industrial ammonia (NH3) synthesis, and oxidation of N2 into nitrogen oxides (NOx) during combustion of fossil fuels. The rate of ...

Sustainability of rice production under flooding conditions has been challenged by water shortage and food demand. Applying higher nitrogen fertilization could be a practical solution to alleviate the deleterious effects stress on lowland (Oryza sativa L.) in semi-arid conditions. For this purpose, field experiments were conducted during summer 2017 2018 seasons. These trials as split-split bas...

the best recognized intestinal manifestation of food allergy is food allergic (food-sensitive) enteropathy. the feature of enteropathy may include lymphocyte and plasma cell infiltration, epithelial abnormality, or crypt hyperplastic villous atrophy, and impairing absorption, enterophaty continues while the food remains in the diet, remitting on an exclusion diet, and usually recurring on food ...

There is a need to optimize water-nitrogen (N) applications to increase seed cotton yield and water use efficiency (WUE) under a mulch drip irrigation system. This study evaluated the effects of four water regimes [moderate drip irrigation from the third-leaf to the boll-opening stage (W1), deficit drip irrigation from the third-leaf to the flowering stage and sufficient drip irrigation thereaf...

background and objectives: production and use of fertilizers in common agriculture have been many environmental problems. while the application of organic fertilizers instead of chemical fertilizers have a important role in soil fertility, increase quality of production and safety of agricultural ecosystems. pumkin, is an important annual herbaceous plant belongs to the cucurbitaceae family due...

Fertilizer application control in reason is the key technology to improve operation quality, reduce fertilizer pollution, and cut down costs of production. A control system of variable rate fertilizer is developed based on microcontroller chip in the paper. The system can automatically control flow dosage by adjusting feed gate opening size and changing hydraulic motor speed of fertilizer conve...

The standard growth-stage-based fertigation schedule has provided the weekly supply amount of fertilizer considering expecting yield with no regard soil nutrient status. study aimed to examine if nitrogen applied at a rate results in best cucumber two greenhouses different levels, i.e. optimal and high. We investigated (N) uptake pattern cucumbers levels which included half (N0.5), (N1) double ...