Titlebook: Modernes Risikomanagement; Steuerung von Kassai Detlef Heinzel,Peter Knobloch,Bj?rn Lorenz,Roland Book 2002 Springer Fachmedien Wiesbaden

冷漠

hereditary

Establishment of Changes in the System “Soil-Fertilizer-Plant” as a Result of Fertilization with Slu):131–139, 2012; Plósz et al., Water Sci Technol 60(2):533–541, 2009) [., ., ., ., .]. Under intensive use of chemical fertilizer, the balance of organic matter is disturbed and chemical and physical properties of soil are degraded. To maintain and improve soil fertility it is necessary to import or

GRAIN

弄臟

只有

WAG

Malte SteinbrinkZum Verh?ltnis von Migration und Entwicklung in Afrika