n Finansiële evaluasie van wisselboustelsels vir die Swartland

[摘要] ENGLISH ABSTRACT:Crop rotation present a possible alternative to wheat mono culture production in theMiddle Swartland region where farming circumstances became increasingly moredifficult since 1996 due to decreasing profit margins. Crop rotation as such presents anumber of advantages like higher yield for wheat within the system and reduced inputscosts mainly due to cuts in fertilizers, herbicides and pesticides. Crop rotation trials arecurrently undertaken at the Langgewens experimental farm in which canola and lupinesare used in rotation with wheat while medics and medic/clover mixtures are used aspasture crops in rotation with wheat.The trials is scheduled to run over a period of 20 years, a study of the possible financialeffect crop rotation might have on the typical farm can be of some importance to decisionmakers in the wheat industry. Due to a lack in reliable information the knowledge of amulti disciplinary panel of experts were use to obtain information concerning certainaspects of crop rotation. The expected profitability could thus be determined. To be ableto determine the expected financial implications on farm level a typical farm model wasdeveloped with the help of the panel of experts. The typical farm of 630 ha was used forthe model. The expected profitability and financial implications of the implementation ofthe eight different crop rotation systems on such a typical farm were estimated makinguse of long term budgets. The dispersion of rainfall over time was identified as the singlemost influential factor on the yields of the different crops in the region and was taken intoaccount determining the profitability of the systems over time. The period used for thecalculations were thus divided into good, average or poor rainfall years.The IRR (internal rate of return) was used as financial criteria in calculating the expectedprofitability of the different

[发布机构] Stellenbosch University