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Thursday, October 18, 2018

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91. Anon.. 1989 Sept.. New machine 'prevents' weeds.. New Farm, p. 33, Rodale Press, Emmaus, PA.
A retired farmer has invented a device that attaches to the back of combines and harvests weed seeds that would otherwise be dropped in the field. Material coming off the chaffer is fed into the harvester's chute. A drag chain carries it over a vibrating screen, which separates weed seeds from straw. An auger moves the seed to a bin. Field tests have shown the device to be most effective with light seeds such as wild oats and kochia. The weed seed can potentially be used as a supplemental livestock feed. Contact Art Fossum, 1034 N. 15th St., Fargo, ND 58102.

1122. Buffum, B.C.. 1909. Arid agriculture: a handbook for the western farmer and stockman.. Worland, WY.
Topics include dryland and irrigated cropping, livestock, alternative forages (dwarf rape, kohlrabi); mentions weed and insect problems, and the use of pyrethrum sprays. Describes a weeder harrow for use in small grains after planting.

1300. Cheema, S.S., D.S. Kler and D.S. Grewal. 1985. Improve wheat yields through bi-directional sowing.. Indian Farming, 35:7-9.
Experiments for 8 seasons showed that bi-directional sowing suppresses weeds, minimises the incidence of powdery mildew and brown rust. Primary yield contributing character was the higher number of effective tillers per unit area. Uniformly spaced plants without overcrowding within the rows, get more solar radiation. Relatively less penetration of light to ground surface resulted in lower soil temperature in bi-directional sowing.

5508. Rai, R.N.. 1980. Weed control in rainfed wheat of Doon Valley.. Indian J. Agron., 25(2):197-200.
The 2,4-D treatment did not give favorable response. Hand-weeding, giving highest wheat yield, provided 331 kg Chenopodium album leaves, a nutritive source of leafy vegetables and proved remunerative.

5934. Rogers, R.D.. 1982. Undercutting as a wildlife conservation method.. Proc. Great Plains Ag. Council, p.25.
Using an undercutter without mulch treaders instead of surface tillage implements for fallow weed control in spring can save up to 50% of the bird nests in wheat stubble. Wheat stubble is often undisturbed following harvest and provides a good source of winter food and cover for wildlife. Nest survival increases directly with undercutter size and can potentially exceed 50% with large, wide-bladed undercutters. Both for wildlife and agronomic benefits, the use of an undercutter for the first spring fallow weed control operation is strongly recommended.

6276. Singh, H. and J.P. Agarwal. 1983. Studies on nitrogen fertilization and weed management in wheat.. Indian J. Agron., 28(1):23-29.
About 40-45 kg N/ha could be saved by pre-emergence application of tribunil over the conventional method of weeding.

6293. Singh, H.P. and J.P. Agerwal. 1982. Studies on nitrogen fertilization and weed management in wheat.. Indian J. Agron., 27(1):71-77.
Nitrogen fertilization did not affect composition, density and dry matter accumulation in weeds. The concentration of N in weeds tended to increase with nitrogen application. Tribunil for weed control. Liberal doses of fertilizers and frequent irrigation have been adopted to realize maximum yields in Mexican dwarf wheats, and have stimulated the rank growth of weeds. The weed flora of wheat has greatly changed in the recent past and some new obnoxious non-legume weeds like Phalaris minor and Avena fatua have come into prominence. Similarity to wheat plant in early stages.

6301. Singh, R.A., O.P. Singh and M. Singh. 1976. Effect of soil compaction and nitrogen placement on weed populations.. Plant and Soil, 44:87-96.
Field experiements showed that soil compaction did not affect wheat yield significantly under rainfed conditions. Weed population was significantly reduced due to soil compaction. Compaction decreased total moisture use and increased water use efficiency. Weed population was not affected due to nitrogen placement. Under rainfed conditions, deep placement of nitrogen was important for increasing the efficiency of fertilizer as well as water utilization by wheat crop.

6600. Soni, P. and R.S. Ambasht. 1977. Effect of wheat crop-weed competition on the mineral structure of wheat crop.. Agro-ecosystems, 3:325-336.
It was found that the reduction in the concentration of nitrogen and phosphorous in the wheat plant started at the vegetative stage itself due to interference from weeds in the weedy stand and the maximal reduction was at the flowering stage (perhaps due to the maximal density of weeds at that stage). From the above investigation it is concluded that weeds growing along with crop plants significantly affect the mineral status of the crop as well as uptake, return and retention by wheat plants.

10652. Chaney, D.. 1991. Marine by-products as fertilizers.. Components, UC Sustainable Agr. Program, Davis, CA (Winter 1991), p. 12-13.
Research and field experience indicate that marine by-products can improve soil structure, enhance soil microbial activity, and promote plant growth. Current processing and distribution costs presently limit their use. Fish waste, fish emulsion, shellfish waste, and seaweed are the major classes of materials. Research has established that seaweed supplies some plant nutrients (especially micronutrients), enhances plant growth, and improves soil tilth.

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