rose flower (rosa hybrida) is appreciated for its beauty, fragrance and long period of flowering. to study the response of cut rose flower to bio-fertilizers, a factorial experiment was performed, with completely randomized design and four replications, in hydroponic greenhouse of alandasht, astane ghods garden, mashhad, iran, during 2009-2010. the first factor was six cultivars of rose flower ...

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...

introduction given the importance of nitrogen for improving the quantitative and qualitative yield of crops (rodrigues et al., 2006) and the need for application of chemical fertilizers in intensive agriculture to get the maximum production, nitrogen supply in adequate amounts by ecologically avowed resources is known as one of the main challenges during transition from conventional to organic ...

This is the first large-scale study to assess climate change impact on grain yield of rainfed wheat for three provinces contrasting climatic conditions (temperate, cold semi-arid, and hot arid) in Iran. Five integrative scenarios including +0.5°C temperature plus−5% precipitation, +1°C plus−10%, +1.5°C plus−15%, +2°C plus−20%, +2.5°C plus−25% were used evaluated. Nitrogen fertilizer shifting pl...

in recent years, surplus usage of chemical fertilizers and inattention the importance organic matter to improve soil fertility, leading to increasing use of chemical fertilizer, environmental pollution and etc. in order to study the different fertilizer levels (organic, chemical and combined) on yield of grain corn (s.c.704) experiment was conducted at the research farm faculty of agriculture t...

Abstract Optimizing nitrogen fertilizer management can reduce nitrous oxide (N 2 O) emissions. This study tested if split applying enhanced efficiency fertilizers (EEFs) resulted in lower N O emissions than equivalent rates of urea at planting. In semiarid southern Alberta, field trials were conducted during three years (planting to harvest) rainfed winter wheat crops. Annual ranged from 146 17...