introduction in recent years, by increasing human knowledge and using different technology on food production, human concerns have increased on safety of food products especially medicinal crops. in order to achieve healthy food production, application of ecological inputs such as organic and biological fertilizers are inevitable. organic fertilizers are fertilizer compounds that contain one or...

This study was carried out in order to evaluate the changes of Nitrogen, phosphor and potassium uptake by wheat and remaining of them in soil under foliar application of Leonardite and foliar application of N and K. The experiment was conducted in Gorgan University of Agricultural Sciences and Natural Resources during 2013- 2014. The experiment was laid out a using split-plot arrangement based ...

The agricultural production system in Sri Lanka consists of two traditional and well-defined components. One is the plantation section, established during the colonial period, consisting of large units, and producing perennial crops such as coffee, tea, rubber, and coconut mainly for export. The other is the smallholder sector comprised of small farms which produce most of the country’s rice, v...

There is need for proper understanding of plant nutrients status in the soil and their requirements by various crops under different farming system. Farmers must be encouraged to make compost from residues, house refuse and other decomposable wastes available with them. If crop residues have been incorporated into the soil, care must be taken that it must be incorporated well in advance (about ...

present study determines not only the total amounts of metals (cr, cu and pb) in superficial agricultural soil of sistan area in eastern iran, but also the chemical partitioning of these elements in seven statistically selected cases. the analysis was run for local soil, soil treated by non-contaminated organic, compost and chemical fertilizers as well as soil treated by metal-contaminated fer...

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...