Browsing by Author "Singh, B. R."
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Item An appraisal of some intercropping methods in terms of grain yield, response to applied Phosphorus and Monetary return from maize and cowpeas(1976) Sudi, Y. A.; Mongi, H. O.; Uriyo, A. P.; Singh, B. R.; University of Dar el salam, TanzaniaInter cropping methods had a significant effect on the yield of cowpeas but not of maize. Applied P affected the yield of mono-or intercropped maize significantly but not of inter cropped cowpeas. At any P rate, the yield of maize was the highest and that of cowpeas the lowest in the relay inter cropping. However, the alternate row inter cropping proved the most economical as h gave 34 percent higher monetary return than the mono-cropped maize. The same hill inter cropping gave an increase of 29 per cent in monetary return over the mono cropping and may be of convenience to farmers because it saves time and labour. Soil inorganic N content increased appreciably under inter cropping conditions; its magnitude was significantly affected by applied P.Item Forms of phosphorus in the separates of three Tanzanian soils belonging to mollisol, alfisol and oxisol orders(1977) Uriyo, A. P.; Singh, B. R.; Kesseba, A.; University of Dar es Salaam, Morogoro, TanzaniaThe .organic constituted the largest proportion of total P in the separates of the soils belonging to the orders Mollisol, AlfisoI and Oxisol in Tanzania. The sand fraction contained the largest amount of organic P in the Mollisol but it contained only half as much as in the clay and silt separates of the .other two soils. The proportion of .organic P to total P was higher Ln the sand of the well-drained Alfisol and Oxisol than in that off the poorly drained Molisol soil. Among the three soils, the Oxisol soil contained the lowest amounts of total inorganic P. The highest content of total inorganic P was associated with the sand fraction in the Molisol, clay in the Alfisol, and silt in the Oxisol soils. The M•P, and Fe-P were dominant in the clay and silt, and the Ca-p was dominant in the sand fraction. Virtually no reluctant soluble Fe-P Wo3JS found in the well-drained Alfisol and Oxisol soils but it constituted the second largest fraction; the first being Fe-P, in the poorly drained Molisol soil in which the content in the separates followed the order: sand Silt = clay. The contents of occluded AI-Fe-P were greater in the separates of the Molisol soil than in those of the others.
