首页 > 给庄稼施肥时,用量越多越好。[]-七年级生物
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下列农业措施不是利用植物顶端优势原理的是[]A.把棉花下部老叶去掉B.在一定时期去掉番茄顶芽C.不损伤杉树主干上的顶芽D.在一定时期去掉果实上部主干-八年级生物
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无土栽培指的是什么?-七年级生物
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给农作物进行深层施肥,可以促使根系向土壤深处生长,这是依据根的什么特性[]A.向水生长B.向肥生长C.向地生长D.固定植物体-八年级生物
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某同学想要验证“植物的生活是否需要无机盐”,于是将两株同样大小的玉米苗分别放在盛有等量蒸馏水和土壤浸出液的试管中培养。实验结果如下图,请根据图回答问题:AB(1)设计本实-七年级生物
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将长势基本相同的番茄幼苗分别培养在4个花盆内。除施肥情况不同外,其他条件都相同。一段时间后,番茄长势最好的应是[]A.施磷肥的盆B.施氮肥的盆C.施钾肥的盆D.不施肥的盆-八年级生物
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植物的植株矮小、生长缓慢等现象时,最可能缺乏的无机盐是[]A.钾B.磷C.钙D.镁-七年级生物
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植物生长需要多种无机盐,其中需要量最多的是含下列哪项的无机盐?[]A.铁、镁、钙B.氮、磷、钾C.氮、铁、锌D.硫、锌、硼-七年级生物
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下列蔬菜中需要含钾无机盐较多的是[]A.白菜B.番茄C.马铃薯D.青菜-七年级生物
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给庄稼施肥时,用量越多越好。[]-七年级生物
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