Crop yields increased dramatically in the United States after Blank______ crop varieties were introduced.Multiple choice question.hybridorganicalternative

Crop yields increased dramatically in the United States after Blank______ crop varieties were introduced.Multiple choice question.organichybridalternative

Production of diverse varieties of crops rather than one specialized crop is called ____. (Choose the correct alternative to fill up the blank) 1 (a) diversification of crops (b) diversification of agricultural production (c) diversification in sectors (d) diversification of employment

The development and diffusion of high yield varieties of food crops.Group of answer choicesMalthusianismIntensive agricultureGreen RevolutionSubsistence agriculture

a) Why has improving crop yields become important these days?b) Mention the major groups of activities for improving yield.c)Which one of these activities is most important and why?

Current high agricultural yields in the United States result in part from heavy reliance on energy-intensive farming techniques.Group of answer choicesTrueFalse