Fertilization, defined

Nitrogen solutions consist of fertilizer product combinations, eg, ammonium nitrate —ammonia, urea—ammonium nitrate—ammonia, urea—ammonium nitrate, and urea—ammonia solutions. Mixed fertilizers cover a broad range and can be loosely defined as fertilizers which contain chemically mixed nitrogen, phosphoms, and potassium (N—P—K). Examples are ammonium phosphate—potash mixtures and ammonium phosphate nitrates. 

Deep soils are more fertile than shallow soils (shallow is defined here as less than 30 cm). 

The terms archaeological soils, archaeosols, anthroposols, and paleosols are variously used to refer to soils that have been physically and/or chemically altered by human habitation or activity. The soil of a site constitutes an integral part of its archaeological record (Wells 2004). It is a well-known fact, for example, that in areas of intense ancient human habitation the fertility of the soil is higher than that of the surroundings. Dark soils rich in organic matter often define, with considerable precision, areas of past intensive human activity. 

Crop rotation is a system where different plants are grown in a defined sequence. The well-designed crop rotation is the basis of the success in organic farming. Continuous monoculture is unacceptable due to the increased pressure of weeds and pathogens and difficulties with maintaining soil fertility. Diversity of crops in... 

Phytofiltration, defined, 3 759t Phytohormones, 13 284 Phytol, 24 550 Phytonadione, 25 794-795 Phytoplankton, fertilizers and, 11 126 Phytopthora palmivora, 13 348 Phytoremediation, 3 784 9 446 in bioremediation, 25 842 defined, 3 759t hydrocarbons, 3 769 Phytostabilization, 3 785 defined, 3 759t... 

Sexually reproducing organisms have a defined fife cycle, beginiung with the fertilized egg and passing through a number of more or less well-defined stages that lead to adulthood and, finally, death. Nothing similar occurs in inanimate structures. 

The phosphate fertilizer industry is defined as eight separate processes phosphate rock grinding, wet process phosphoric acid, phosphoric acid concentration, phosphoric acid clarification, normal superphosphate, triple superphosphate, ammonium phosphate, and sulfuric acid. Practically all phosphate manufacturers combine the various effluents into a large recycle water system. It is only when the quantity of recycle water increases beyond the capacity to contain it that effluent treatment is necessary. 

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