Perhaps my comment doesn't meet your problem entirely. Mostly as foreigners we are too long with our sentences, in a foreign language. This is my own experience, also with English, in which to write I had seldom opportunity in the past, now only I write in RG, though I have much to read in English. One method could be: After reading the own written sentence, which seems to be too long a) shorten, b) divide into two parts. A good stylistic way could be, a phrase with some longer sentences continue with one or two sentences, which are very short. Best wishes, Hein.
(1) In your field you should be working hard at making your sentences as simple as possible to reduce the chances of misinterpretation.
For example, simplify by reducing sentence length e.g., by using acronyms i.e., GIS in place of "Geographical Information System"
(2) Practice on other researchers' material in your field:
"This review addresses the potential of image-based remote sensing to provide spatially and temporally distributed information for precision crop management (PCM). PCM is an agricultural management system designed to target crop and soil inputs according to within, field requirements to optimize profitability and protect the environment. " (Moran et al., 1997)
Flesch-Kincaid Grade Level = 19.2
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Precision Crop Management (PCM) is an aid to the management of agriculture. It does this by mapping crops and soil types. In the field it should increase profits and help to better protect the environment. This is a review of the potential for remote sensing to provide spatial and temporal data for PCM.
I usually adopt and recommend short and simple sentences with no more than 25 words. Each sentence should be nearly self-contained, and highly linked to its surroundings text. Each paragraph should illustrate specific set of linked, ideas. It should also as concise and simple as possible. Re-read your text, or preferably ask your someone else to read it.
A thesaurus can help you find simpler words to substitute for complex words. However, make sure you understand the meaning of a word before using it, especially if English is not your native language.
You might try subscribing to the newsletter from Wylie Communications. Even if you can't invest in a class, the newsletter offers tips that can help.
If you are working in Microsoft Word, you can set it to show a measure of the success of your changes. Go to File --> Options --> Proofing --> When Correcting Spelling and Grammar in Word --> Readability Statistics.