scholarly journals Gender and inorganic nitrogen: what are the implications of moving towards a more balanced use of nitrogen fertilizer in the tropics?

2017 ◽  
Vol 15 (2) ◽  
pp. 136-152 ◽  
Author(s):  
Cathy Rozel Farnworth ◽  
Clare Stirling ◽  
Tek B. Sapkota ◽  
M. L. Jat ◽  
Michael Misiko ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Inorganic Nitrogen ◽  
The Tropics

Effects of Time of Nitrogen Application on Yield of Maize in the Tropics

1966 ◽  
Vol 2 (2) ◽  
pp. 101-105 ◽  
Author(s):  
Adeboyejo A. Fayemi
Keyword(s):  
Nitrogen Fertilizer ◽  
Crude Protein ◽  
Crude Protein Content ◽  
Nitrogen Application ◽  
Time Of Application ◽  
Cropping Season ◽  
Maize Grain ◽  
High Yields ◽  
The Tropics ◽  
Maize Ear

SummaryA four-year study from 1958 to 1962 showed that time of application of fertilizer nitrogen greatly influenced the yield of grain, the percentage of nitrogen and the crude protein of the grain under Nigerian conditions characteristic of the early maize cropping season from March to July. Split applications of nitrogen fertilizer significantly increased maize grain yield by 35 per cent when two equal doses were given one month and two months after planting; and by 31 per cent when four equal doses were supplied at planting and one month, two months and three months after seeding. Yield was significantly reduced when application was delayed two months after planting. High yields of maize were not obtained by supplying the whole of nitrogen fertilizer at one time, eidier at sowing or any time later during the growing season. However, applying all of the nitrogen fertilizer one month after planting significantly increased the percentage of nitrogen and of the crude protein content of the grain. The maize ear weight was favourably influenced by spreading the nitrogen application over the three-month period of the maize growth.

Sugar cane as an energy source for the production of meat

1969 ◽  
Vol 6 (1) ◽  
pp. 29-35 ◽  
Author(s):  
T. R. Preston ◽  
M. B. Willis
Keyword(s):  
Energy Source ◽  
Recent Work ◽  
Sugar Cane ◽  
Inorganic Nitrogen ◽  
Human Nutrition ◽  
Foreseeable Future ◽  
Beef Production ◽  
Production And Distribution ◽  
The Tropics ◽  
Distribution Problems

Whatever solutions are eventually found for our present production and distribution problems with protein, meat will be the preferred form for the foreseeable future. Beef production in the tropics, where human nutrition has often been characterised by protein deficiency, has long been bedevilled by a variety of difficulties. Recent work in Cuba shows how sugar cane, in conjunction with inorganic nitrogen, can contribute significantly to the solution of some of these problems.

scholarly journals Broiler Litter and Inorganic Nitrogen Fertilizer Influence on Yield and Earliness of June-bearing Strawberry

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 487E-487
Author(s):  
I.G. Rubeiz ◽  
A.M. Chehab ◽  
M.M. Freiwat ◽  
M.T. Farran
Keyword(s):  
Nitrogen Fertilizer ◽  
Inorganic Nitrogen ◽  
Leaf Tissue ◽  
Growing Season ◽  
Good Alternative ◽  
Nitrogen Fertilizers ◽  
Inorganic N ◽  
Short Term ◽  
Broiler Litter ◽  
Micro Elements

Short-term soil application of broiler litter (B) has had variable results when compared to inorganic nitrogen fertilizers (Ni). We grew `Oso Grande' strawberry on raised beds in the greenhouse and treated it with a preplant soil incorporation of B (N = 44, P = 15.3, H2O = 170 g·kg–1) at a N rate of 100 (B1) or 200 (B2) kg·ha–1, and Ni from ammonium nitrate (34.5N–0P–0K) [A] or fluid nitrogen with 10 g·kg-1 micro elements (30N–0P–0K) [F] applied in six equal monthly applications. Results show that fruit yield was increased under B-treated plots (P < 0.05), with B2 yielding the highest. Yield ranged between 172 to 324 g/plant. Fruit number per plant ranged from 14 to 24, with B2 yielding the highest (P < 0.05). Early flowering was enhanced by B2 (P < 0.05), which reflected in higher early yields under B2 (P < 0.05). Leaf tissue NO3-N, PO4-P and Fe were comparable among all treatments during the growing season. Soil NO3-N, available P, CaCO3, and pH at the end of the season were comparable among the treatments (P 0.05), whereas EC was reduced by B1 and F treatments (P < 0.05). We recommend B at 200 kg N/ha as a fertilizer for June-hearing strawberry, and as a good alternative to inorganic N fertilizers.

scholarly journals Field experiments with slurry and dicyandiamide: response of potatoes and effects on soil mineral nitrogen

1993 ◽  
Vol 41 (2) ◽  
pp. 95-109
Author(s):  
W.P. Wadman ◽  
J.J. Neeteson ◽  
G.J. Wijnen
Keyword(s):  
Nitrogen Fertilizer ◽  
Field Experiments ◽  
Inorganic Nitrogen ◽  
Maximum Yield ◽  
Soil Layer ◽  
Nitrification Inhibitor ◽  
Mineral Nitrogen ◽  
Residual Soil ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen

In the period of 1983-1985, 18 field experiments with potatoes grown for industrial starch production were set up in the Netherlands to investigate the effects of poultry-slurry application on tuber yield and on soil mineral nitrogen. Slurry was applied in autumn with and without the nitrification inhibitor dicyandiamide (DCD) and in spring without DCD. Control treatments without slurry or DCD were included. Various nitrogen fertilizer rates were applied to all slurry treatments. In autumn, following slurry application without DCD, slurry-derived nitrate moved to the 0.3-0.6 and 0.6-1 m soil layers. Following DCD-application, most of the slurry-derived nitrate remained in the 0-0.3 m soil layer. Maximum yields as estimated from a nitrogen fertilizer response function were slightly increased by the slurry application. Nitrogen supplied from the slurry decreased the amount of fertilizer nitrogen needed for maximum yield. Increasing the amounts of soil mineral nitrogen in June from slurry or applied inorganic nitrogen fertilizer increased residual soil mineral nitrogen at harvest.

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