an investigation was conducted on the effects of vermicompost as an organic matter and a substitute for fertilizers during year 2007 in ferdowsi university of mashhad (fum). vermicompost was applied at five levels (0, 10, 25, 50, 100%) and phosphorus at two levels with 3 replications for each treatment, as a factorial based on completely randomized design for super strain b tomato cultivar. the...

introduction: use of unbalanced chemical fertilizers especially p, having low absorption efficiency and low solubility compounds with soil components, has resulted in the production and use of bio-fertilizers (17, 23 and 29). bio-fertilizer is a preservative material consisting of one or several specific beneficial micro-organisms or their metabolic products used to supply plant nutrients and d...

The application of organic fertilizers alone or in combination with bio-fertilizers is important for sustainable agriculture, healthy agricultural production and restoring soil quality. Compost, vermicompost and mycorrhiza amendments could improve soil quality and plant yield. However, little is known about their impact on yield and quality of European borage (Borago officinalis L.). To evaluat...

this study was conducted for evaluating the combined effect of soil moisture, phosphorus (p) and zinc (zn) levels on the growth attributes of potato (solanum tuberosum l. cv. agria). this investigation was arranged as a factorial experiment based on randomized complete blocks design with zn at three levels (0, 10 and 20mg zn per kg dry soil as zinc sulfate), p at three levels (0, 30 and 60mg pe...

Nitrogen (N) and Phosphorus (P) deficiency is a major yield limiting factor across the globe their proper management plays vital role in optimizing crop yield. This field experiment was conducted to assess impact of soil plant nitrogen N P ratio on growth wheat (Triticum aestivum L.) alkaline calcareous soil. The study consisted various levels (0, 40, 80, 160 kg ha−1 as urea) phosphorus 30, 60,...

This study was conducted to determine the effects of different vermicompost doses on plant growth, quality properties and element contents in curly lettuce (Lactuca sativa L. var. crispa). The research carried out pots under plastic greenhouse conditions Karabük province. In study, 6 applications as 4 (V), chemical fertilizer (CF) control were examined. follows: 1) Control (100% soil), 2) V1 (9...

Introduction High sedimentation and nutrient loading is a major issue leading to undesirable water quality conditions, especially in extensive agricultural systems (Turner and Rabalais 2003). Eutrophication in both inland and coastal systems has shown to be deleterious to aquatic ecosystem functioning (Dodds and Whiles 2010). Controlling excess nutrients such as phosphorus and nitrogen can slow...