You mean in the Green Revolution?
Right. Khrushchev really pushed for improving the Soviet chemical industries (including fertilizers and pesticides), and the use of agrichemicals really jumped during his tenure.
Khrushchev also pushed for better crops to be used, though he really overdid this and wanted maize to be planet in areas where it really wasn't suitable (which is a shame, since it also discredited maize in the climates where it would have done well in the Soviet Union).
And of course, Lysenkoism was ended under him.
I'm not sure what else Khrushchev could have done to participate in the green revolution... Under him, Soviet Agriculture became more chemical and more scientific.
fasquardon