Although the macro - cost - drivers have difficulty in calculating , they influence greatly on cost control of agricultural product . chapter 6 . cost trade - off control of agricultural product cost results from many cost - drivers that influence not only on cost but also on each other themselves 这些成本动因虽不能具体化为成本项目而记入农产品成本中，但这些成本动因以不同形式影响着农产品成本的形成方式、形成内容及补偿程度，而且这些动因一旦形成，又很难变动，对农产品成本具有长期影响。
Part iii ( chapter4 ) analyses quantitatively trend , construction and influencing factors of agricultural product cost and studies the relationship between agricultural product cost and agricultural performance , then gives some ways to low agricultural product cost . partiv ( chapter5 , 6 & 7 ) focuses on the ways of enhancing agricultural performance 本章以滨州市20世纪90年代主要农产品成本资料为依据，对农产品成本及其结构、趋势、影响因素、成本效益等作了定量分析，从投入、产出的角度研究农产品成本与农业经济效益的关系，为降低农业的投入增加农业的产出提供重要依据。
Then , the chapter analyses quantitatively trend , construction and influencing factors of agricultural product cost and studies comparatively cost - efficiency of different crops , different calculation system and different countries . chapter 5 . cost - driver control of agricultural product there are many cost - drivers influencing on agricultural product cost 通过对农产品成本及其结构、趋势、影响因素、成本效益的定量分析，研究农产品成本的结构变动以及各种影响因素对农产品成本的影响程度和影响结果，以便为成本控制提供重要依据。
Secondly , selecting more than thirty kinds of agricultural products , through the analysis of output increasing ratio , the pure cost - income ratio and the output proportion in our nation , this paper discusses the advantage of hubei province ' s agriculture , from three aspects : market prospect , product scale and benefit situation 然后，选取三十多种农产品，通过分析农产品产量增长率、湖北省农产品产量比重和农产品成本纯收益率，从市场前景、规模和效益状况三方面，探讨了湖北省农业产业优势特征。
