non-linear production function for agriculture has many advantages and is suitable for analyzing agricultural production 摘要非線性農(nóng)業(yè)生產(chǎn)函數(shù)具有很多優(yōu)點(diǎn),適于農(nóng)業(yè)生產(chǎn)分析。
the computation should be as below : firs t to process and analyze the data with software-sas, spss and so on; then to set up linear production function, cobb-douglass production function and quadratic production function; and to calculate total returns, marginal returns and average returns; and finally to carry out comparative analysis about all the computation results of different methods 除此以外,還建立了線性生產(chǎn)函數(shù)、二次生產(chǎn)函數(shù)等不同類(lèi)型的數(shù)學(xué)模型,并對(duì)不同方法的計(jì)算結(jié)果進(jìn)行對(duì)比分析,以尋找最切合實(shí)際而行之有效的經(jīng)濟(jì)學(xué)方法。分析表明:在時(shí)間演變上,張掖綠洲農(nóng)業(yè)水資源總效益是遞增的,而且具有加速度,反映了農(nóng)業(yè)技術(shù)進(jìn)步對(duì)生產(chǎn)發(fā)展的促進(jìn)。