Which one of the following periods has provided the evidence of a ploughed field at Kalibangan in Rajasthan ?

Archaeological excavations at Kalibangan in Rajasthan have revealed a distinct cultural sequence consisting of two main periods. The evidence of a ploughed field is specifically associated with the Early Harappan levels (Period I), predating the urban Mature Harappan phase [4]. This field is considered one of the earliest examples of ploughed agricultural land in the world. It features a unique grid pattern with two sets of furrows intersecting at right angles, which suggests that the inhabitants practiced a double-cropping system, growing two different crops simultaneously [4]. While the Mature Harappan phase (Period II) at Kalibangan shows advanced town planning and grid-based housing similar to Mohenjo-daro, the agricultural innovation of the ploughed field belongs to the preceding Early Harappan occupation [5]. This period is dated roughly between 3000 BCE and 2600 BCE [3].

Sources

1. [1] THEMES IN INDIAN HISTORY PART I, History CLASS XII (NCERT 2025 ed.) > Chapter 1: Bricks, Beads and Bones > 2.1 Agricultural technologies > p. 3
2. [3] https://ncert.nic.in/textbook/pdf/lehs101.pdf
3. [4] https://satheessc.iitk.ac.in/sathee-ssc/student-corner/ncert-books/class-12/themes-in-indian-history/chapter-01-bricks-beads-and-bones-the-harappan-civilisation/
4. [5] https://en.wikipedia.org/wiki/Kalibangan