分面浏览：发表日期 |
| 当前检索式 | ((ALL：crop yield)) |
| 限定条件 | 无 |
| 2024 2 | 2023 11 | 2022 46 |
| 2021 82 | 2020 146 | 2019 121 |
| 2018 140 | 2017 129 | 2016 173 |
| 2015 143 | 2014 122 | 2013 113 |
| 2012 68 | 2011 91 | 2010 86 |
| 2009 77 | 2008 54 | 2007 44 |
| 2006 54 | 2005 38 | 2004 18 |
| 2003 23 | 2002 12 | 2001 9 |
| 2000 12 | 1999 9 | 1998 9 |
| 1997 16 | 1996 8 | 1995 3 |
| 1994 2 | 1992 1 | 1990 1 |
| 1984 1 | 1982 1 |
