• Brainly User
1) How do different conditions affect the speed at which fruit and vegetables ripen?
2)How do different types of fertilizers affect plant growth?
3)What happens when you grow sweet potatoes next to other plants?
4)How do different treatments change how fast seeds sprout?
5)How close does a pesticide have to be to protect a plant?
6)What effect does seed size have on how well a crop like oats or wheat grows?
7)Are different plants affected in different ways by specific microorganisms?
8)How does soil pH affect the pH of water that touches the soil ?
9)Do different varieties of the same fruit have the same level of vitamin C?
10)What happens to the way plants grow if there are no microorganisms in the soil?

Model on cropping pattern
different type of irrigation methods
use of gmo
use of hyv seeds 
and many more