干旱、缺肥,是陕北地区农业生产稳产高产的最大障碍。去年的干旱是四十年来少有的,为了抗旱夺丰收,一九七二年我们和贫下中农一起,将五亩小麦茬复种谷子,施用“五四○六”抗生菌肥作试验,证明“五四○六”菌肥是一种抗旱夺丰收的好肥料。贫下中农称赞说:“五四○六是个宝,顶肥、顶水效果好,施用方便容易制,抗旱保收离不了。” Drought and lack of fertilizer are the biggest obstacles to the steady and high-yield agricultural production in northern Shaanxi. Last year’s drought was rare in the past 40 years. To fight drought and bumper harvest, in 1972, we worked with poor peasants and low-middle peasants to re-plant five hectares of wheat stubble and applied “May Fourth” antibacterial fertilizer to prove that “ 5460 ”Bacterial fertilizer is a good fertilizer for drought-resistant harvest. Poor middle peasants praised: “5460 is a treasure, top fat, top water effect is good, convenient and easy to use system, drought can not afford to receive.”