نتایج جستجو برای: fertilizers and micro nutrients

تعداد نتایج: 16852989  

2015
M. USMAN

Recent studies have revealed that the integrated use of organic and inorganic fertilizers on crop has not received adequate research attention. In this paper, maize is considered among the most important cereal crops in Nigeria and all over the world that has high requirement for organic and inorganic nutrients in order to obtain good quality and high yields. The application of inorganic fertil...

2014
M. Jiang X. P. Shen W. Gao M. X. Shen Q. G. Dai

We studied the heterogeneity of soil weed seed-bank in a rice-wheat rotation system after long-term application of different organic or non-organic fertilizers, and the effects of major nutrients on the characteristics of the weed seed-bank. The soil was sampled in the Taihu area after a 31-year long-term fertilization experiment. Weed seeds were identified and counted in the surface soil of 12...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

the present paper investigates how far ideologies can be tease out in discourse by examining the employed schemata by two ideologically opposed news media, the bbc and press tv, to report syria crisis during a period of nine months in 2011. by assuming that news is not a valuefree construction of facts and drawing on micro structural approach of schema theory, for the first time in discours...

2017
Oluwaseyi Samuel Olanrewaju Bernard R. Glick Olubukola Oluranti Babalola

The idea of eliminating the use of fertilizers which are sometimes environmentally unsafe is slowly becoming a reality because of the emergence of microorganisms that can serve the same purpose or even do better. Depletion of soil nutrients through leaching into the waterways and causing contamination are some of the negative effects of these chemical fertilizers that prompted the need for suit...

Extended Abstract Introduction and Objective: In order to investigate the effect of foliar application of main elements and micronutrients on morpho-physiological and yield traits of rice plants with the aim of increasing yield and reducing the use of chemical fertilizers, experiments in the cropping years 2015-2016 and 2016-2017 in the research farms of Nowshahr city (Mazandaran) was implemen...

2003
DOUGLASS F. JACOBS ROBIN ROSE DIANE L. HAASE Douglass F. Jacobs

The application of controlled-release fertilizers (CRF) at the time of planting offers a means to improve the establishment of forest tree seedlings. As compared to conventional fertilizers, the gradual pattern of nutrient release from CRF may better coincide with plant needs, minimize leaching, and improve fertilizer use efficiency. Many different CRF types are available and products differ in...

A. Khosravi M. Zarei

ABSTRACT-The enrichment of bedding for vermicomposting systems with organic and inorganic additives is a technique which can promote the quality of produced vermicompost. Phosphate rock and fishmeal are two available and low-cost substances which can be provided easily and inoculation of vermicompost with phosphate solubilizing microorganisms (PSMs) can enhance the availability...

2001
V. C. Baligar N. K. Fageria Z. L. He

Invariably, many agricultural soils of the world are deficient in one or more of the essential nutrients needed to support healthy plants. Acidity, alkalinity, salinity, anthropogenic processes, nature of farming, and erosion can lead to soil degradation. Additions of fertilizers and/or amendments are essential for a proper nutrient supply and maximum yields. Estimates of overall efficiency of ...

2004
Robert L. Mahler

carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), potassium (K), sulfur (S), calcium (Ca), magnesium (Mg), boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), nickel (Ni), and zinc (Zn). These 17 essential elements, also called nutrients, are often split into three groups (fig. 1). The first group is the three macronutrients that plants can obtai...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
سیده شیرین گلباز دانشجوی کارشناسی ارشد ترویج و آموزش کشاورزی، دانشگاه زنجان اسماعیل کرمی دهکردی دانشیار گروه ترویج، ارتباطات و توسعة روستایی، دانشگاه زنجان غلامرضا مجردی استادیار گروه ترویج، ارتباطات و توسعة روستایی، دانشگاه زنجان

farmers' behavior can be affected by different socio-economic factors. the purpose of this study is to analyze the impact of interpersonal information sources on grape farmers’ behavior in terms of optimum use of fertilizers in their vineyards. the data for this survey were collected using a questionnaire through structured interviews. a sample of 260 out of 3942 grape farmers of the khora...

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