气候变化领域集成服务门户(CCPortal): Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt

CCPortal

DOI	10.1088/1748-9326/ab503b
	Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt
	Deines J.M.; Wang S.; Lobell D.B.
发表日期	2019
ISSN	17489318
卷号	14 期号:12
英文摘要	Conservation tillage is a primary tenet of conservation agriculture aimed at restoring and maintaining soil health for long-term crop productivity. Because soil degradation typically operates on century timescales, farmer adoption is influenced by near-term yield impacts and profitability. Although numerous localized field trials have examined the yield impacts of conservation tillage, their results are mixed and often unrepresentative of real-world conditions. Here, we applied a machine-learning causal inference approach to satellite-derived datasets of tillage practices and crop yields spanning the US Corn Belt from 2005 to 2017 to assess on-the-ground yield impacts at field-level resolution across thousands of fields. We found an average 3.3% and 0.74% yield increase for maize and soybeans, respectively, for fields with long-term conservation tillage. This effect was diminished in fields that only recently converted to conservation tillage. We also found significant variability in these effects, and we identified soil and weather characteristics that mediate the direction and magnitude of yield responses. This work supports soil conservation practices by demonstrating they can be used with minimal and typically positive yield impacts. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Causal forests; Causal inference; Conservation agriculture; Crop yields; Landsat; Tillage; Us corn belt
语种	英语
scopus关键词	Crops; Small satellites; Soils; Causal forests; Causal inferences; Conservation agricultures; Crop yield; LANDSAT; Tillage; Soil conservation; conservation tillage; crop yield; Landsat; maize; satellite data; soil conservation; soil degradation; soybean; Corn Belt; United States; Glycine max; Zea mays
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154280
作者单位	Department of Earth System Science, Center on Food Security and the Environment, Stanford University, United States; Institute for Computational and Mathematical Engineering, Stanford University, United States
推荐引用方式 GB/T 7714	Deines J.M.,Wang S.,Lobell D.B.. Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt[J],2019,14(12).
APA	Deines J.M.,Wang S.,&Lobell D.B..(2019).Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt.Environmental Research Letters,14(12).
MLA	Deines J.M.,et al."Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt".Environmental Research Letters 14.12(2019).