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secondary nutrients and micronutrients fertilizers
释义
secondary nutrients and micronutrients fertilizers
Encyclopedia
农学
中微量元素肥料
释
secondary nutrients and micronutrients fertilizers
中微量元素肥料
中量元素肥料和微量元素肥料的统称。与大量元素氮、磷、钾的含量相比较而言,在作物干物质组分中,钙、镁、硫的含量一般在百分之一到万分之一,称为中量元素。对于作物来说,含量介于0.2~200毫克/千克(按干物重计)的必需营养元素称为“微量元素”。
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throttle [expansion] process
throttle expansion process
throttle governing
throttle orifice
throttle position sensor
throttle process
throttle steam distribution
throttle-type silencer,blow-off silencer
throttle value
throttling expansion refrigeration effect
throttling kill manifold
throttling marks
throttling process
Through a Glass Darkly
through-air thermal bonding
Through-back Boxing
through casing resistivity logging device
throughflow
through-focus image
through-hardening
through-hole coating
through-illumination
through line of the action in the whole play
throughput
throughput capacity
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