Some 60% of Australia% beef cattle are located in the tropics and subtropics, grazing, in general native pastures of low digestibility and N content. Production per head is low, as also are reproductive rates. The nutritional problem centres around the low contents of phosphorus, sulphur and nitrogen in pastures from June to December. This paper discusses responses in breeding cattle to supplem...

Chapter 10 Micronutrients II: Trace Elements ...............................................................................357 Individual trace elements. ................................................................................................................362 Zinc ............................................................................................................................

Characteristics of surface runoff from a 0.14-km2 urban catchment with separated sewer in Macau was investigated. Water quality measurements of surface runoff were carried out on five rainfall events during the period of August to November, 2005. Water quality parameters such as pH, turbidity, TSS, COD, TN, Zn, Pb, and Cu were analyzed. The results show that TN and COD are the major pollutants ...

Sugar beet, an important sugar crop, is particularly cultivated in humid regions to produce beet sugar, fulfilling about 25% of the world’s requirement, supplementing cane sugar. However, not well adopted farming system tropics and subtropics, which largely due historically well-established production technology sugarcane lower awareness among local growers cultivation. Thus, poor understanding...

CLAUDIA RAEDIG1,2 & HOLGER KREFT3,4 1Institute for Technology and Resources Management in the Tropics and Subtropics, Cologne University of Applied Sciences, Betzdorfer Straße 2, 50679 Cologne, Germany 2Department of Systematic Botany, Institute of Biology I, University of Leipzig, Johannisallee 21, 04103 Leipzig, Germany 3Biodiversity, Macroecology & Conservation Biogeography Group, Georg-Augu...

Many regions of the subtropical and tropical continents such as southern Amazonia, Australia, and the southwestern and central United States, have repeatedly experienced extreme droughts over the past few decades, and accompanied by an increasing wetness over the equatorial regions. These phenomena seems to be consistent with an apparent intensified and poleward expansion of the tropical meridi...