最近 ,笔者通过调查了解到 ,农村在推广实用农业科学技术中 ,农户迫切需要以下八种农技器具 :一是化肥成份测定器。目前 ,市场上化肥品种繁杂 ,一些劣质化肥不同程度地混入其中 ,坑农害农 ,农户急需一种小型、简单、易掌握的化肥成份测定器 ,以鉴别化肥真伪和所含成份。二是小 Recently, the author learned through investigation that in rural areas in the promotion of practical agricultural science and technology, farmers urgently need the following eight kinds of agricultural equipment: First, the chemical composition analyzer. At present, there are many types of chemical fertilizers on the market. Some inferior chemical fertilizers are mixed with different degrees of pollution. Pit farmers and peasants urgently need a small, simple and easy-to-grasp chemical analyzer to identify the authenticity and content of fertilizers. Second, small