Effects of long-term cropping on the forms and the availability of micronutrients in dryland soils on the Loess Plateau
黄土高原旱地长期种植作物对土壤微量元素形态和有效性的影响

The low availability of soil micronutrients in dryland of the Loess Plateau cannot meet the need of crop growth and then it has become one of the limiting factors for the agriculture production in this area for many years.The current cropping systems applied in the area may have effects on the availability of soil micronutrients.The long-term field cropping experiment,which composed of fallow(FA),continuous clover cropping(CC),continuous wheat cropping(WC), and clover-legumes rotation(CLR),was initiated in ...