نتایج جستجو برای: p levels of chemical fertilizers

تعداد نتایج: 21364929  

2018
Christian Vogel Camille Rivard Verena Wilken Andreas Muskolus Christian Adam

A pot experiment was carried out with maize to determine the phosphorus (P) plant-availability of different secondary P-fertilizers derived from wastewater. We analyzed the respective soils by P K-edge X-ray absorption near-edge structure (XANES) spectroscopy to determine the P chemical forms that were present and determine the transformation processes. Macro- and micro-XANES spectroscopy were ...

اکبرپور, وحبد, چالوی, ویدا, چرگی, مهدی,

Adding compost and vermicompost organic fertilizers to soil can improve soil physical conditions, nutrient elements and microorganisms. In the present study, the effect of the cow manure, vermicompost, and urea chemical fertilizer, alone or in combination, on the yield and qualitative characteristics of basil (Ocimuom basilicum L.) was investigated. The experiment was conducted as a split plot ...

احمدی‌فرد, مریم, حیدری, سعید, دارایی مفرد, علیرضا, عزیزی, خسرو,

Reduction of chemical fertilizer consumption in the production of agricultural products, using bio-fertilizers as a suitable substitution or complementary for chemical fertilizers has privileges from ecology and economical aspects. The advantages of applying of bio-fertilizer are providing plant with different nutrients in accordance to the natural ability of plant, enhancing and improving soil...

In order to study the effect of phosphate biofertilizer and chemical fertilizers of nitrogen, phosphorus and sulfur  on some growth and yield components  of Camelina sativa L.,  a study was conducted based on a factorial experiment; this was done in a randomized complete block design with three replications at Kazeroon during the 2016 growing season. Treatments included bio-based phosphorus (P)...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1390

abstract previous researches have shown success of growth hormones usage on flower production increase, pod and prevention of abscission of them in some of the pulses. two tests were done, in order to find out the effects of growth hormones to on flower production increase, pod and chick pea yield composites in farmer conditions (2010-11) and green house conditions as factorial on the proje...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1390

building on previous studies on the effectiveness of different types of written corrective feedback, the present study aimed at investigating whether direct focused corrective feedback and direct unfocused corrective feedback produced any differential effects on the accurate use of english articles by efl learners across two different proficiency levels (low and high). in current study, the par...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Journal: :journal of agricultural science and technology 2010
s. mohammadi m. kalbasi h. shariatmadari

long-term application of fertilizers containing p, especially organic fertilizers, usually increases the water soluble and available p of soil and at the same time may result in p accumulation in soil. organic fertilizers may also increase movement of p in the soil profile that could result in surface and ground water pollution. an experiment was conducted on field plots that received three app...

Organic fertilizers in sustainable agricultural system are causing yield stability, especially in production of medicinal plants. Also consideration to forgotten medicinal plants such as Zuleng (Eryngium caucasicum Trautv.) that the leaves contain essential oils is most important because of the rich genetic potential. In order to evaluate the effects of different organic and chemical fertilizer...

Journal: :علوم گیاهان زراعی ایران 0
علی سپهری استادیار، دانشگاه بوعلی سینا، دانشکده کشاورزی، گروه زراعت و اصلاح نباتات، تخصص: زراعت افشین کرمی دانشجوی ارشد

in order to study the effects of integrative applications of chemical fertilizers and biofertilizers on grain yield and oil of borago officinalis under water deficit stress, a field experiment was conducted at kermanshah, iran, in 2011. experiment was arranged as split plot under a randomized complete block design with 3 replications. water deficit stress with four levels was applied as the mai...

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