农业节本增效工程──推广化肥深施技术通讯水市机械深施化肥技术推广成就与展望天水市早在１９８７年就开始引进、改制化肥深施机具并开展试验。示范推广工作。经多点试验测定，用机具追施碳铵的玉米，比人工追施亩增产４３公斤，增产率为１６．５３％；冬小麦返青机械深... Agricultural cost-effective synergistic project ─ ─ promote the deep chemical fertilizers technology news water machinery deep fertilizer technology to promote the achievements and prospects of success Tianshui back in 1987 began to introduce and reform fertilizer deep facilities and carry out experiments. Demonstration promotion. The multi-point test determined that the use of machinery to pursue ammonium bicarbonate corn, than the artificial catchy mu yield 43 kg, the yield was 16.53%; winter wheat turning green deep ...