Vetch green manure increases rice yields: …Proper depth and timing of incorporation allows maximum results
AuthorsW. A. Williams
D. C. Finfrock
Authors AffiliationsW. A. Williams is Associate Professor of Agronomy, University of California, Davis; D. C. Finfrock, formerly Specialist in Agronomy, is now Crop Production Advisor, Ford Foundation, New Delhi, India.
Hilgardia 17(1):12-13. DOI:10.3733/ca.v017n01p12. January 1963.
Purple vetch produces greater rice yields when turned under 4 to 6 inches than when placed at shallower depths. Shortening the time interval between turning under the vetch and flooding and sowing the rice, also increases yields—when conditions are favorable to nitrification during the preflooding period. When properly incorporated, vetch green manure is equal to mineral sources of ammonium nitrogen in increasing rice yields.
Also in this issue:Characters, distribution, and food plants of phlepsid leafhopper vectors of California aster-yellows virus
The relation of pear psylla to pear decline … greenhouse tests
Orchard tests substantiate: Role of pear psylla in pear decline
Pear psylla: In abandoned orchards
Control of pear psylla: With oils and oil-pyrethrins
Phytotron modification: Admits more sunlight through plastic panels
Granulated insecticides superior to sprays for: Alfalfa weevil control
Field maturity—seed yield—shatter loss for: Potomac orchardgrass and hardinggrass
Evidence of nonspecific transmission of California aster-yellows virus by leafhoppers