Crop Production And Management - Free MCQ Test with solutions, Class 8

Combine, is a machine designed to efficiently harvest a variety of grain crops. The name derives from combining reaping, threshing, and winnowing into a single process.

The process of separating grains from chaff is called as winnowing

Rabi crops are sown in winter from October to December and harvested in summer from April to June. Some of the important rabi crops are wheat, barley, peas, gram and mustard.

The crops that are sown in the rainy season are called Kharif crops in India. Kharif crops are usually sown with the beginning of the first rains in July. The example of kharif crops are:- 
Paddy and maize. 

Weedicides are commonly called herbicides. They are chemicals that control weeds to enter the field and compete with the crops andhence cause a direct effect on the crop. Some common herbicides are Metachlor, Nitofen, Round-  up and  2,4-D.

The correct answer is A as Seed drill is a device that sows the seeds for crops by positioning them in the soil and burying them to a specific depth.

Yes, Manure and fertilisers are used to add nutrients in the soil. Farmers turn to fertilizers because these substances contain plant nutrients such as nitrogen, phosphorus, and potassium. Fertilizers are simply plant nutrients applied to agricultural fields to supplement required elements found naturally in the soil.

Combine is machine used in harvesting crops. Combine harvest all crop easily. We don't have to work Mannualy for harvesting crops.
So, the statement that combine is used for sowing of seeds is false.
 

False because first agricultural task is preparation of soil.

Drip irrigation is water economical method because in this irrigation system water falls drop by drop on the position of roots of the plant, thereby reducing both the consumption and loss of water.

Seed drill is for drilling the seeds or actually sowing seeds not removing seeds.

Winowing is used for this process.

Kharif crops, which are also known as monsoon crops, are the crops which are grown during the monsoon or rainy season (June to October). ... The main Kharif crops grown in India include paddy, maize, jowar, bajra, cotton, sugarcane, groundnut, pulses etc.

Fertilizers enhance the natural fertility of the soil or replace the chemical elements taken from the soil by previous crops. Modern chemical fertilizers includes one or more of the three elements that are most important in plant nutrition:- nitrogen, phosphorus and potassium.

The Thanjavur district is famously known as the "Granary of South India", since the rule of Chola dynasty. This district lies at the Kaveri delta region, the most fertile region in the Tamil Nadu state. The district is the main rice producing region in the state and therefore known as "Rice Bowl of Tamil Nadu".