Anil Ahlawat Solutions for Chapter: Improvement in Food Resources, Exercise 1: EXERCISES

Some species of fish can be cultured in a single fishpond. These fish do not compete for food as they have different food habits. In the following options, fish are paired with their food habits. Select the incorrect match.

Match column I with column Il and select the correct option from the given codes.

Read the following statements carefully and select which of them are true (T) and which of them are false (F).

(i) Exotic breed which is very popular for egg-laying but is not ideal for meat purposes is White Leghorn.
(ii) Karan-Swiss is a high-yielding cross breed cattle variety while Jersey-Sindhi is an indigenous breed of India.
(iii) Much breeds are milk-yielding while draught breeds are working animals.
(iv) Ayrshire is an Indian breed of cow.

Read the given paragraph where few words have been italicised.

Irrigation ensures that the crops get water whenever they need it during growing season. Tube wells are surface water source of irrigation. They get water from porous soil strata. Canal system of irrigation draws water from rivers and is also related to generation of hydroelectricity. River lift system is advantageous in those areas where river water is easily available. Both canals and river lifts are groundwater sources of irrigation.
Select the correct option regarding this.

It has been found that major plant diseases and insect outbreaks are less likely to occur in a natural field than on a conventional farm because

Read the given passage and answer the following question:
Three different cropping patterns, viz. $X,$ $Y$ and $Z$ are applied to get the maximum benefits from a crop field. In $X$, two or more crops are grown together in the same field in different rows or strips. In $Y$ also, two or more crops are grown together but not in definite rows. In $Z$ , different crops are grown on a piece of land in a pre-planned succession. These cropping patterns maintain soil fertility and crop yield. Select the option that correctly identifies any two of these cropping patterns.

Read the given passage and answer the following question.
Three different cropping patterns, viz. X, Y and Z are applied to get the maximum benefits from a crop field. In X, two or more crops are grown together in the same field in different rows or strips. In Y also, two or more crops are grown together but not in definite rows. In Z, different crops are grown on a piece of land in a pre-planned succession. These cropping patterns maintain soil fertility and crop yield.

Which of the following options is correct regarding criteria of crop selection for these cropping patterns?

Select the option showing the correct sequential steps to produce a new genetic variety of a crop.