Correct option is D
The Law of Restitution was propounded by J. Von Liebig. This law suggests that after nutrients are removed from the soil by crops, they can be replenished either by natural processes or through the addition of external fertilizers. Liebig, a famous agricultural chemist, was instrumental in advancing the understanding of soil fertility and how essential nutrients are utilized by plants. His work emphasized the importance of fertilizer management and maintaining a balanced supply of nutrients for optimal crop production.
Mitscherlich: Mitscherlich is known for Mitscherlich's Law, which relates fertilizer application to crop yields.
Spillman: Spillman made important contributions to soil science.
Baule: Baule’s contributions to soil science.