Conservation tillage can drastically influence the environment by conserving soil due to enhancing soil structure and quality, thereby maintaining stable crop productivity and quality. To evaluate the effects of tillage practices, wheat residue management, and rate of nitrogen fertilization on soil and sweet corn quality, a 2-year (2014–2015) field study was conducted at the School of Agriculture farm, Shiraz University, Shiraz, Iran. Treatments consisted of three tillage systems including conventional (CT), reduced (RT), and no tillage (NT) as main plots, four N rates (0, 69, 138, and 207 kg N ha⁻¹) as sub plots, and wheat residue management, removed versus retained, as sub–sub plots. Increasing N rates slightly increased ECe but not to the detrimental levels for crop or soil health. Soil pH was buffered due to the calcareous nature of the experimental soil. Soil organic carbon and total nitrogen were higher under RT and NT than CT, although the changes were considerably low. Soil bulk density was higher under NT treatment, which resulted in lower marketable yield after 2 years probably due to the limitations in nutrient uptake and N immobilization and applying high rates of N could reduce or eliminate N immobilization and limitations in nutrient uptake, resulted in comparable yield to CT. The higher N rates increased kernel protein content but reduced soluble solids of kernels (brix). Reduced tillage was slightly superior to the other two tillage practices in case of soil and kernel quality and marketable yield, while applying high N rate (207 kg N ha⁻¹) to NT practice could compensate yield reduction during the transition from CT to NT practice.

保护性耕作会通过提高土壤结构和质量来保护土壤，从而对环境产生巨大影响，从而保持稳定的作物生产力和质量。为了评估耕作方式，小麦残留管理和氮肥施用量对土壤和甜玉米质量的影响，在伊朗设拉子设拉子大学农业学院进行了为期两年（2014-2015年）的田间研究。 。处理包括三个耕作系统，包括常规耕作（CT），减耕（RT）和无耕作（NT）作为主要耕地，四个氮素施用量（0、69、138和207 kg N ha ^-1）作为子图，将小麦残留量管理与子图删除（保留）相对。氮含量的增加使ECe略有增加，但对作物或土壤健康没有不利影响。由于实验土壤的钙质性质，土壤的pH得到了缓冲。在RT和NT下，土壤有机碳和总氮比CT高，尽管变化很小。在NT处理下，土壤容重较高，这可能导致2年后市场产量下降，这可能是由于养分吸收和固氮的限制所致，而施以高比例的N可以减少或消除固氮和养分吸收的局限性，导致可比屈服于CT。较高的氮含量增加了籽粒蛋白质含量，但减少了籽粒的可溶性固形物（白利糖度）。^-1）转换为NT做法可以补偿从CT转换为NT做法期间的产量下降。