Humidity Farming

What is the benefit, if any, of having small forests serving as the borders of croplands?

I was thinking that windbreaks are utilized to slow desertification. On the same premise, small crop areas are bordered with forests on all sides. Evaporation still rises, but horizontal evaporation, such as what cools the human body might potentially be minimized. Thus, the vapor would remain in the crop area to settle again in the cooling evening.

If that were true, how deep would the forest tract have to be? This is a crucial question because every foot of forest area is a foot less of crop area, therefore, a loss of profit to the farmer.

Would increased humidity aid in the amount of nutrient maintained in the soil?

What is the maximum size the crop area can be before bordering?