Browse on keywords: fertility wheat weed
Search results on 09/19/18
2181. Gill, G.S. and W.M. Blacklow. 1984. Effect of Great Brome (Bromus diandrus Roth.) on the growth of wheat.. Aust. J. Agric. Res., 35:1-8.
Studied competition between wheat and great brome. Competition with great brome reduced the concentration of nitrogen and phosphorous in wheat shoots. The reduction suggested that great brome competed with wheat for absorption of nitrogen and phosphorous. Competition with great brome also resulted in significant reduction in the grain yield. Reduction in mass per grain was probably due to competition with great brome for water during grain-filling.
2809. Hume, L.. 1982. The long-term effects of fertilizer application and three rotations on weed communities in wheat.. Can. J. Plant Sci., 62:741-750.
The effect of fertilizer application and three rotations (continuous cropping, fallow-wheat, and fallow-wheat-wheat rotations)on the species composition of the weed community was examined using rotations that had been running for 21-22 yrs. Fertilizer application tended to reduce community differences between continuous cropping and short-term wheat-fallow rotations. With the use of 2- or 3-yr wheat-fallow rotations and herbicide application, weed problems can be minimized in southeastern Saskatchewan.
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.
7472. Wells, G.J.. 1971. Skeleton weed in the Victoria Mallee: 3. The effects of applied phosphorus and nitrogen on wheat on infested land.. Australian J. of Exp. Agric. Anim. Husb., 11:229-35.
The lucerne stands selected in the first three years were overgrazed and not very dense. Under these conditions, lucerne offers little competition to skeletonweed. The effect of phosphorus in reducing grain protein content is probably the result of higher grain yields with the associated dilution of protein in the grain.
8448. Willis, H.. 1990. Wheat - the staff of life.. Acres USA, May 1990, p. 11-14.
The best long-term way to control weeds is to get soil nutrients into balance, with relatively high calcium and phosphorus, and low potassium levels. Soaking seeds in hydrogen peroxide solution for 8 hours should increase germination rate. A general foliar feed recipe is given consisting of 1 qt. liquid phosphoric acid, 1 gallon household ammonia, and 2 gallons liquid fish emulsion. A refractometer can be used to monitor crop health. For growing wheat, use sap from the second and third newest leaves. Later, use the flag leaf. A sugar reading of about 18% or above is good. Readings over 25% are excellent and below 8% poor.