What people are saying - Write a review
We haven't found any reviews in the usual places.
Washington D C
Explanation of terms used in the key 1 Comments on varieties included in the key
27 other sections not shown
Other editions - View all
acid acre acre-foot Agricultural ammonium sulfate areas average yield beetles black shank brake horsepower brood bushels check valve colonies Corn Belt cost cows crops cryolite deep-well turbine dehydrated diameter discharge disease ear rot effective efficiency engine equipment experiments fallow farmers feed feet fertilizer fertilizer materials fibers FIGURE fleeces foliage fuel fungicides fungus grades grain head hog-beef hog-dairy hogs honey horsepower illus impeller inches income increased infected irrigation land leaf livestock loss materials meat method moisture motor nicotine nitrogen obtained operation percent percentage period pipe plants plots pounds production pump quantity ratooned resistant rotation rotenone samples season seed seedlings sneezeweed soil sorghums speed spores spring stalk stubble superphosphate sweetpotatoes temperature tests tion tobacco tomatoes typical United urea usually valve varieties water hammer weight wilt winter wheat wool