CSIRO Harden Long-Term Tillage Experiment

The data comprises soil, plant, climatic and management data arising from a 30-year (1990-2019) on-farm field experiment comparing a range of tillage and stubble management treatments in a continuous annual winter-cropping sequence. The crops include wheat, canola, narrow-leafed lupin and fieldpea as a winter cover crop. The tillage and stubble treatments included a factorial combination of stubble burning in autumn, or stubble retention with cultivation (once pre-sowing with tyned implement), and / or no-till. In addition, a stubble incorporate treatment was included involving disc ploughing to incorporate the residue on the first rain after harvest each year, and further cultivation for weed control where necessary. These 5 treatments spanned the entire 30 years. This stubble incorporated treatment was split for + or - supplementary nutrients applied to the stubble prior to cultivation as a strategy to increase carbon sequestration from the residue between 2007 and 2014. Regular measurements included plant population, biomass, yield and yield components, grain quality, soil mineral N and soil water pre-sowing and at harvest. Several publications have been published from the experiment on crop productivity, soil biology, soil carbon and constraints to the productivity of no-till systems.Lineage: Measured field data and associated modelling from a CSIRO led long term experiment (1990-2019)

本数据集包含源自一项为期30年（1990-2019年）田间农场试验的土壤、植物、气候与管理数据，该试验在连续年度冬作种植序列中对比了多种耕作与秸秆管理措施。供试作物包括小麦、油菜、窄叶羽扇豆以及作为冬季覆盖作物的田间豌豆。耕作与秸秆管理措施包含如下因子组合：秋季秸秆焚烧、留茬并配合播前一次弹齿农具耕作，以及/或者免耕（no-till）。此外，试验还设置了秸秆翻压还田处理：即在每年收获后第一场降雨时用圆盘犁翻压秸秆残体，并在必要时开展额外耕作以防控杂草。上述5种处理贯穿整个30年试验周期。2007年至2014年间，该秸秆翻压还田处理被分为两组：一组在耕作前向秸秆施加补充养分，以此作为提升残体碳固存能力的策略，另一组则不施加该养分处理。常规测定指标涵盖播前与收获期的植株密度、生物量、产量及其构成因子、籽粒品质、土壤矿质氮与土壤含水量。目前已有多篇基于该试验的研究论文发表，研究主题涉及作物生产力、土壤生物学、土壤碳循环以及免耕系统的生产力限制因素。数据集溯源：由澳大利亚联邦科学与工业研究组织（CSIRO）主导的1990-2019年长期田间试验的实测数据与配套建模结果。