Intra-pulse characteristics of different radar emitter signals reflect on signal waveform by way of changing frequency, ......

本文通过对稻田土壤中速效Ｋ含量进行干鲜样品对比测定试验分析，证明了水稻土壤的新鲜样品完全可代替风干样品进行速效Ｋ的测定分析试验......