Please just check English grammar, word and sentence if that makes sense without background.

Since my early childhood my mother gave me manual kinds of opportunities to enjoy myself with nature through trip, camp and so on, and then I've liked to spend time in nature and observe creatures and growing foods with nature.
And I'd had to be sensitive to foods I had when belonged to track and field club for six years, because they make my body and condition for track and field meet and tournaments so I've interested in foods.
And also I decided to belong to the department of agriculture in university. Through studying abroad and some classes during 1 to 2 years in university, I found many things I can be proud of in Japan and that Japanese trade business in agriculture weren't doing well.
That's why I'd like to expert agricultural things to overseas to contribute to Japan.

Question

Please just check English grammar, word and sentence if that makes sense without background.

Since my early childhood my mother gave me manual kinds of opportunities to enjoy myself with nature through trip, camp and so on, and then I've liked to spend time in nature and observe creatures and growing foods with nature.
    And I'd had to be sensitive to foods I had when belonged to track and field club for six years, because they make my body and condition for track and field meet and tournaments so I've interested in foods. 
   And also I decided to belong to the department of agriculture in university. Through studying abroad and some classes during 1 to 2 years in university, I found many things I can be proud of in Japan and that Japanese trade business in agriculture weren't doing well. 
   That's why I'd like to expert agricultural things to overseas to contribute to Japan.

angeline2323 · Answer

Since early childhood, My Mother gave me many kinds of opportunities to enjoy myself with nature through trips, camps and so on. I like to spend time in nature, observe creatures and grow plants .
 I was to be sensitive to foods. I was in a track and field club for six years, because they shape my body for track and field conditions.
  I decided to belong to the department of agriculture in university. Through studying abroad and some classes during 1 to 2 years in university, I found many things I can be proud of in Japan and that Japanese trade business in agriculture weren't doing well. 
   That's why I'd like to be an expert at agricultural things and to contribute to Japan.

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There were a lot of mistakes, someone needs to proof read my revision too just in case. But I improved this text.

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