Field experiments on concentrated organic nitrogen fertilizers
نویسندگان
چکیده
منابع مشابه
Greenhouse Experiments with Atmospheric Nitrogen Fertilizers and Related Compounds
In connection with a study at the Fixed Nitrogen Research Laboratory on the possible transformation products of cyanamid, there was obtained a number of materials and mixtures concerning which there is either very little known, or concerning which there is still some doubt as to their fertilizing value. Thus, in the preparation of urephos, a product was obtained in which approximately 55 per ce...
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Synthetic (e.g. urea) and organic fertilizers (e.g. compost) differed markedly in N isotope composition and the greater the difference between organic and synthetic fertilizer the more robust will be the differentiation of crops and vegetable grown under different farming systems. The objective of this study was to compare nitrogen and carbon isotope composition of organic fertilizers and manur...
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The aim of this study was to evaluate the long-term (16-years) nitrogenefficiency after the application of organic and mineral fertilizers at two sitesLukavec (S1) and Suchdol (S2) with different soil and climatic conditions in theCzech Republic (Central Europe) and to determine grain yield and nitrogen contentwith regard to the requirements of protein content for baking quality of wheat.After ...
متن کاملOrganic Fertilizers and Composts
Introduction Interest in organic production methods for vegetables continues to increase. Production practices for organic field production of vegetables have a long history, but practices to grow organic vegetable transplants in a spring greenhouse are poorly known. Organic fertilizers and composts are available but the efficacy and rates for use have not been evaluated. Experiments in the sum...
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Effects of organic manure (poultry manure) applied alone and integrated with inorganic fertilizer (urea) on yield and yield component, N-uptake and soil fertility in wheat-maize cropping system was evaluated in a field experiment at Nuclear Institute for Food and Agriculture, Peshawar, Pakistan. Poultry manure was applied alone and were integrated in different proportions with mineral nitrogeno...
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ژورنال
عنوان ژورنال: The Journal of Agricultural Science
سال: 1958
ISSN: 0021-8596,1469-5146
DOI: 10.1017/s0021859600031476