A profitable agriculture is dependent upon a high percentage of humus in the soil.
"Crops and Methods for Soil Improvement" by Alva Agee
Bring back samples of leaves and of leaf mould or humus for class-room observation.
"Ontario Teachers' Manuals: Nature Study" by Ontario Ministry of Education
Soils that are rich in humus are usually very fertile.
"Conservation Reader" by Harold W. Fairbanks
The humus theory seems to have been first promulgated by Einhof and Thaer towards the close of last century.
"Manures and the principles of manuring" by Charles Morton Aikman
To be brief, the soil is highly nitrogen deficient, and completely lacking in humus.
"Shepherd of the Planets" by Alan Mattox
Choose not the poorest soil by any means, but a good, sandy loam in which there is a considerable amount of humus.
"The Pecan and its Culture" by H. Harold Hume
Most of it is a rich black humus, resting on clay and mountain limestone.
"Brighter Britain! (Volume 1 of 2)" by William Delisle Hay
Diana demands poor, dry, gravelly soil without much humus or nitrogen.
"Manual of American Grape-Growing" by U. P. Hedrick
When a forest is cleared there is a spongy humus on the ground surface that is extremely rich, but this washes away in a single season.
"Our Southern Highlanders" by Horace Kephart
Beneath the thin covering of humus, he struck a solid surface and his fingers slid along it.
"The World That Couldn't Be" by Clifford Donald Simak
Such tests will show the presence of adequate amounts of humus, and indicate the acidity content.
"A Living from the Land" by William B. Duryee
It should contain an ample supply of humus made of leaf mold.
"Ginseng and Other Medicinal Plants" by A. R. (Arthur Robert) Harding
Green crops turned under, grass roots, stubble, leaves, long manure, etc., form humus.
"Farm Gardening with Hints on Cheap Manuring" by Anonymous
Humus, or vegetable mould, is capable of absorbing almost twice its own weight of water.
"Man and Nature" by George P. Marsh
The ideal is a medium sandy loam, well supplied with humus for good water holding capacity.
"The Tomato" by Paul Work
For the "Nos habebit humus" argument can be interpreted in two ways.
"Medieval English Nunneries c. 1275 to 1535" by Eileen Edna Power
This it does by covering the inorganic soil with humus or decayed organic material.
"A Civic Biology" by George William Hunter
They need especially good, rich soil, with plenty of humus or the fine soft earth that is full of decayed vegetable matter.
"Gardening for Little Girls" by Olive Hyde Foster
Any fresh excavation of cellar or cistern, or cut for road or railway, will show the characteristics of the humus layer.
"The Elements of Geology" by William Harmon Norton
The humus on the woodland floors and forests was drawn on.
"The Iron Ration" by George Abel Schreiner