Step 1: Concept Identification
The query seeks the ancient Indian text that advises that uniform seeds produce optimal results. This necessitates specialized textual knowledge.
Step 2: Textual Analysis
(A) Manusmṛti: A legal and social conduct text, not an agricultural manual.
(B) Kṛṣiparāśara: Attributed to sage Parashara, this ancient (c. 400 BCE) text is exclusively dedicated to agriculture ('Krishi'). It offers practical guidance on all farming aspects, including weather, ploughing, seed selection, sowing, and harvesting. A significant emphasis is placed on seed quality and uniformity.
(C) Rigveda: The oldest Vedic text, comprising hymns. It mentions agriculture (e.g., barley) but is not a practical guide.
(D) Arthaśāstra: Kautilya's treatise on statecraft, economics, and military strategy. It includes a section on agricultural administration (Sitadhyaksha) but focuses on management and revenue rather than detailed farming techniques.
Step 3: Conclusion
The provided advice aligns with the practical, technical focus on farming found in Kṛṣiparāśara.