Nature Studies on the Farm: Soils and Plants

animals apple beans better blanket garden branches buds burdock corn plants cornfield cottonseed meal cover cover crops cowpeas cultivation decay early cabbage Ensilage farm farmer feet fertilizers field forest fruit trees give grass plants grew ground grown growth harrow hoed crops hoeing hold water hole humus inches deep insects kill kinds land layer leaf lesson lettuce live loam manure meadow Miss Early Miss Purple mixed moisture mulch Nature Study nitrogen orchard Orchard-Grass pasture phosphoric acid plant food plant's business plants grow plowed potato pupil pure clay radish rain rivers roots rows Russian thistle sand school garden season seed small grain sown spading fork spring sprout stem stir the soil Stories subsoil sweet potato teacher tell things tomato transplants twigs UNIVERSITY OF CALIFORNIA vegetable washed weeds wheat plant wild wind wood