A field experiment was carried out in the Research and Production Station, National Research Center, El-Nobaria during the season, 2009 to evaluate the effect of cobalt and different sources of phosphorus fertilizers on the growth, yield quantity and quality of tomato. Treatments can be arranged in descending order as follows: Mono super phosphate (MSP) > Triple super phosphate (TSP) > Rock pho...

to study the effect of three soil fertilizing systems (chemical, organic, and integrated) on forage yield and quality of globe artichoke (cynara scolymus) an experiment was conducted using a randomized complete block design (rcbd) of four replications at the research farm of college of agriculture, university of tehran, karaj, iran in 2006. the treatments included 5 levels of chemical fertilize...

environmental problems associated with the excessive use of chemical fertilizers and abiotic stresses due to soil pollution by heavy metals have encouraged use of biological fertilizers in modern agriculture. in order to protect environment and reduce the tension caused by heavy metals, it is essential to use biofertilizer in crop production. to assess the effects of biofertilizers on yield and...

in order to study the effect of biological and chemical fertilizers of nitrogen and phosphorus on some physiological, morphological and phenological traits of sunflower this study was carried out in eivanegharb (ilam province) in summer of 2011. treatments were arranged in split factorial based on rcbd with three replications. the main plot include 4 levels of phosphorus and nitrogen chemical f...

in recent years, the debate over the environmental sustainability of agricultural productions is widely increased. in this context, environmental impacts of potato production by semi-mechanized method were studied in markazi province of iran. in this research, life cycle assessment approach was used to identify and reduce environmental impacts. the environmental impacts of potato production in ...

Aim . The aim of research is to determine the suitability and fertilizing value fertilizers‐ameliorant, as well assess degree their contamination with heavy metals; approbation fertilizers‐ameliorants in various conditions cultivation agricultural crops. Material Methodology main agrochemical parameters sewage sludge chemical composition glauconite were studied by analytical methods laboratory ...

Many concerns exist today in rural and urban sectors about the threat to natural resources because of the problems agricultural production practices are causing, i.e. use of chemicals affecting the quality of life (Padgitt, 1987; Hallberg, 1986; Baker, Kanwar & Austin, 1985). Through the use of chemical fertilizers, herbicides, and pesticides farmers are able to produce a reliable source of aff...

The relation between agriculture and energy is very close. Agricultural sector itself is an energy user and energy supplier in the form of bio-energy (Alam et al., 2005). It uses large quantities of locally available non-commercial energies, such as seed, farmyard manure and animate energy, and commercial energies directly and indirectly in the form of electricity, diesel fuel, chemical fertili...

Approaches to soil management, including problems of soil degradation and low soil fertility, have recently undergone major changes. The former view was to concentrate on achieving high levels of production from the more fertile areas, leaving the marginal lands for extensive use only. Steeply sloping and highly drought-prone areas were preferably not to be cultivated at all. Soil constraints w...