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secondary nutrients and micronutrients fertilizers
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secondary nutrients and micronutrients fertilizers
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中微量元素肥料
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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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rank
rank analysis
rank-based tributory system
rank classification
rank classification of water resources and hydropower projects
rank correlation
rank correlation analysis
rank correlation coefficient
rank correlation coefficients
rank correlation method
rank criteria
rank criterion
rank deficient adjustment
rank deficient model
rank detector
ranked
ranked data
ranked set sampling
ranked space
rank estimate
rank-free
rank function
Rankin
Rankine
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