Which of the following actions by farmers contributes to desertification? rotating crops
allowing farm equipment to rust in the fields
planting windbreaks and practicing contour farming
abandoning overused farmland without replenishment

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature