1011. The control and preservation of natural resources for present and future use is called_________________?

A. Sustainability
B. Conservation
C. Crop residue management
D. None of above

1012. Ratio of economic yield to biological yield expressed in percentage is called_______________?

A. Harvest index
B. Seed index
C. Total yield
D. Dry matter

1013. The practice of producing two successive crops of same species from same piece of land in one year is called_________________?

A. Intercropping
B. Doubling cropping
C. Monocropping
D. Cropping pattern

1014. The amount of water required to rise a crop to matunty with in a given period of time is called________________?

A. Water frequency
B. Water depletion
C. Water balance
D. Crop Water requirement

1015. A region with an annual rainfall less than 10 inches comes under_________________?

A. And climate
B. Semi-and climate
C. Wet climate
D. None of the above

1016. One of the plant introduced from new world to the old world is_________________?

A. Rice
B. Wheat
C. Sugarcane
D. Potato

1017. The leguminous plants are important in agriculture because_________________?

A. They need very little water to grow
B. Six crops are harvested in a year
C. They are disease resistant
D. Help in nitrogen economy of nature

1018. Percentage of area irrigated by a cusec of water during the season is called_______________?

A. Intensity
B. Base period
C. Cusec
D. Irrigation frequency

1019. Ratio of crop yield to the amount of water utilized is called______________?

A. Soil water use
B. Crop water use efficiency
C. Soil plant water relationship
D. Water intensity

1020. Plants having no defined limits of vegetative and reproductive element is called______________?

A. Absolute growth
B. Assimilation
C. Indeterminate growth
D. Determinate growth