actually, you estimated a regression model. Hence, you could make your life easier by labeling it that way. Reviewers will be prompted to wanting to see a model fit which you cannot offer.
As Holger Steinmetz 's comment has indicated, your analysis is that of an ordinary least squares regression (also called multiple linear regression) analysis, having 7 independent variables/predictors to account for differences in the DV (Yield).
For what to say, and how to say it, please refer to guides for interpreting regression models. Here's some simple starting links: