ちなみに、
>>6
(1) Declining production was the result of a vicious circle of less growth.
(2) Declined production was the result of a vicious circle of less growth.

(1) がごくごく自然であり（というか、大いに出現頻度が高く）、(2) は俺自身は
見たことがないけど、理屈上は可能だろうし、そういう英文を書く人がたまに
いても仕方がないかな、と思う。

ただ、(2) を書くくらいなら、次のように書けば実に自然になる。
(2-b) Reduced production ...

参考（以下、すべてニュースサイトより）

(3) Agriland-Oct 15, 2018
★Reduced production★ is more than compensated by an increase in beginning
stocks. In fact, corn supplies are at the highest the country has ...

(4) Georgia Today-Jun 25, 2018
... decreased compared to the period 2014-2017, both in percentage and absolute terms.
★Reduced production★ is the most likely reason for this.

(5) Financial Post-Jan 25, 2016
Connacher said that ★reduced production★ was the result of an accelerated maintenance
schedule, but Nemeth said maintenance usually lasts ...