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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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ring with a ring of operators
ring with divided powers
ring with division
ring with identity
ring with involution
ring with maximum condition
ring with minimum condition
ring with operators
ring without identity
ring without zero divisors
ring with polynomial identity
ring with straightening law
ring with zero multiplication
ringworm anus
ring(xiangmie) of Lisu nationality
Rinne test
Rinow
rinse-off cosmetics
Rinsing
rinsing
rinsing water automation control
R-integrable function
R-integral
Rinzai School
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