Different crops have different requirements for their proper growth , as they grow in different season . Based on the season in which they grow , crops are categorised as:-
1.rabi crops
2.kharif crops

The crop that are sown in the winter season are called rabi crops.
The Rabi crop (Hindi

Hindi

Standard Hindi, or more precisely Modern Standard Hindi, also known as Manak Hindi , High Hindi, Nagari Hindi, and Literary Hindi, is a standardized and sanskritized register of the Hindustani language derived from the Khariboli dialect of Delhi...

: रबी, Urdu

Urdu

Urdu is a register of the Hindustani language that is identified with Muslims in South Asia. It belongs to the Indo-European family. Urdu is the national language and lingua franca of Pakistan. It is also widely spoken in some regions of India, where it is one of the 22 scheduled languages and an...

: رَبِیع) is the spring harvest

Harvest

Harvest is the process of gathering mature crops from the fields. Reaping is the cutting of grain or pulse for harvest, typically using a scythe, sickle, or reaper...

 (also known as the "winter crop") in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 and Pakistan

Pakistan

Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

. The term Rabi means "spring" in Arabic, when the crop is harvested. Crops that are grown in the winter season, from November to April are called Rabi Crops. Some of the important Rabi crops are wheat, barley, peas, gram and mustard. States of northern India such as Punjab and Kashmir and in Pakistan Sindh are important for the production of wheat and other rabi crops. Availability of precipitation during winter months due to the western temperate cyclones helps in the success of these crops.
in Pakistan

Pakistan

Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

Rabi season starts on 16 October and lasts on 15 April (Next year)

The chief rabbi crops are wheat, barley, gram, pulses, linseed and mustard. These crops are garneted in spring season.