(一) 我从事农业技术推广工作30多年。在这30多年中,我深深体会到,农民对于氮肥、磷肥的投入比较多,也比较重视,忽视了钾肥的投入。但是从近几年的情况来看,钾肥严重不足,影响着产量的提高,从目前情况看呢,化学性的钾肥,价格比较高,货源又比较紧,满足不了农业生产的 (A) I am engaged in agricultural technology promotion more than 30 years. In these 30 years, I deeply understand that peasants are more devoted to nitrogenous fertilizer and phosphate fertilizer, they also pay more attention to, and ignore the investment of potash fertilizer. However, the situation in recent years, a serious shortage of potash, affecting the increase in production, from the current situation, chemical potash, the price is relatively high, the supply is tight, can not meet the agricultural production