Determination of the critical soil mineral nitrogen concentration for maximizing maize grain yield

2013 ◽  
Vol 372 (1-2) ◽  
pp. 41-51 ◽  
Author(s):  
Yunfeng Peng ◽  
Peng Yu ◽  
Xuexian Li ◽  
Chunjian Li
Keyword(s):  
Grain Yield ◽  
Nitrogen Concentration ◽  
Mineral Nitrogen ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen ◽  
Maize Grain Yield ◽  
Maize Grain

Effect of lupin management on the yield of subsequent wheat crops in a lupin-wheat rotation

1985 ◽  
Vol 25 (3) ◽  
pp. 603 ◽  
Author(s):  
A Petch ◽  
RW Smith
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Western Australia ◽  
Treatment Effects ◽  
Nitrogen Availability ◽  
Mineral Nitrogen ◽  
Control Treatment ◽  
Soil Nitrate ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen

Wheat was grown in a series of 1:1 rotation cycles with sweet lupins over 8 years on three sites in Western Australia. Grain yield of wheat was the main test used to compare five lupin management treatments with a control treatment, 'no-lupins'. The lupins were cut as for silage, cut as for hay, or harvested as mature grain, the stubble being burnt or removed in summer, or turned into the soil the next autumn. Nitrogen taken up in the lupins and in the wheat was measured, as well as soil mineral nitrogen in the top 10 cm in the final year. Lupin yield and nitrogen content within any year were similar over all treatments. As much nitrogen was removed in hay and silage as in mature lupins, but wheat yielded most grain after the 'silage' and 'hay' treatments, and least after 'no-lupins' or after the 'remove' and 'turn-in' stubble treatments. Nitrogen uptakes in young wheat plants point to treatment effects due to differences in nitrogen availability, but the treatments also caused different weed populations which at least partially affected wheat yields. Herbicide control of encroaching weeds in the lupins raised soil nitrate levels the following summer and increased subsequent wheat yields.

Time of sowing and wheat production in southern NSW

1970 ◽  
Vol 10 (46) ◽  
pp. 604 ◽  
Author(s):  
GD Kohn ◽  
RR Storrier
Keyword(s):  
Soil Moisture ◽  
Grain Yield ◽  
Nitrogen Concentration ◽  
Mineral Nitrogen ◽  
Wagga Wagga ◽  
Grain Protein ◽  
Soil Mineral Nitrogen ◽  
Soil Organic Nitrogen ◽  
South Wales ◽  
Moisture Potential

Wheat (CV. Heron) sown on clover-improved soils at Wagga Wagga, New South Wales, over the period 1961 to 1965 showed a general reduction in yield and an increase in grain protein percentage with delay in sowing. Grain yield decreased by 3.7 per cent for each week's delay in sowing after the end of April and the rate of grain protein increase ranged from 0.09 to 0.56 per cent for each week's delay, depending on seasonal conditions. This grain protein increase was accompanied by a reduced kernel size which resulted in a decrease in grain protein yield of 12.5 lb an acre for each week's delay in sowing. The reduced grain yield with later sowings was associated with less efficient use of soil moisture the post-flowering period. Although the cumulative evapotranspiration of early sown crops was about two inches greater than that for late sown crops in mid-spring, all sowings reduced the soil moisture potential to -15 bars to a depth of four to five feet at maturity. However, the late sown crops matured more rapidly with a reduction in all yield components. Changes in soil mineral nitrogen concentration during the growing season indicated that there Was adequate nitrogen available for all sowings. In two years mineralization of soil organic nitrogen occurred under the crops and contributed significantly to the crops requirement. In a third year mineral nitrogen losses from the soil could not be accounted for by plant uptake.

The influence of water on wheat yield, plant nitrogen uptake and soil mineral nitrogen concentration

1965 ◽  
Vol 5 (18) ◽  
pp. 310 ◽  
Author(s):  
RR Storrier
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Dry Matter ◽  
Mineral Nitrogen ◽  
Wheat Crop ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen ◽  
Grain Number ◽  
Plant Nitrogen ◽  
Stage Of Development

Water, in addition to the natural rainfall, was applied at five different stages of crop development to Heron wheat growing on a highly fertile soil. Dry matter yield, grain yield, the grain yield parameters (ear number, grain number per ear, weight per grain), and nitrogen content were measured. Changes in soil mineral nitrogen content as a consequence of water application and subsequent plant uptake were also studied. A single application of water at jointing, and treatments involving watering at all pre-anthesis stages during a period of moisture stress, increased straw and grain yields and floret development, as reflected in grain number per ear. Water applied after anthesis controlled to some degree the loss of dry matter and plant nitrogen exhibited by a maturing wheat crop. The number of tillers produced, the number surviving, or the number of ears were not increased by adding water at any stage of development. The increased grain yield that followed late additions of water was due to increases in the weight per grain. The addition of water during the jointing to milk stage increased the uptake of mineral nitrogen by the crop, to a depth of 30 inches. No increase in the mineralization of organic nitrogen was detected by soil analysis, but an approximate balance sheet indicated that mineralization, which was occurring during the growing season, was further stimulated by watering.

Modification of the biophysical water function to predict the change in soil mineral nitrogen concentration resulting from concurrent mineralization and denitrification

2012 ◽  
Vol 92 (5) ◽  
pp. 695-710 ◽  
Author(s):  
Alex Georgallas ◽  
Jacynthe Dessureault-Rompré ◽  
Bernie J. Zebarth ◽  
David L. Burton ◽  
Craig F. Drury ◽  
...  
Keyword(s):  
Nitrogen Concentration ◽  
Mineral Nitrogen ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen

scholarly journals Soil mineral nitrogen and the rating of CaCl2 extractable nutrients  

2017 ◽  
Vol 63 (No. 4) ◽  
pp. 177-183 ◽  
Author(s):  
Łukowiak Remigiusz ◽  
Barłóg Przemysław ◽  
Grzebisz Witold
Keyword(s):  
Oilseed Rape ◽  
Mineral Nitrogen ◽  
Primary Data ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen ◽  
Single Form ◽  
Crop Harvest ◽  
Extractable Nutrients ◽  
N Pool

It was assumed that the determination of the mineral nitrogen (N<sub>min</sub>) content in the 0.01 mol/L CaCl<sub>2</sub> could rely on measurements of single form NO<sub>3</sub><sup>–</sup>-N, NH<sub>4</sub><sup>+</sup>-N or both, and even including other extractable nutrients. This hypothesis was verified based on some primary data from 17 fields: ten with oilseed rape and seven with maize as indicatory crops during three consecutive seasons in a production farm in Górzno, Poland. The contents of NO<sub>3</sub><sup>–</sup>-N, NH<sub>4</sub><sup>+</sup>-N, P, K, Mg and pH were measured in soil prior to the spring vegetation start and after a crop harvest (autumn). Phosphorus in spring and NH<sub>4</sub><sup>+</sup>-N in autumn, were variables discriminating against the number of clusters. It was higher in cropping sequences (CSs) with maize than with oilseed rape. The reliability of N<sub>min</sub> determination and distribution between clusters in spring based only on NO<sub>3</sub><sup>–</sup>-N was fully corroborated for maize CSs. In autumn, irrespective of the CS, the decisive factor in N<sub>min</sub> prediction and distribution over clusters was the NH<sub>4</sub><sup>+</sup>-N pool. This study resulted in the rating of CaCl<sub>2</sub> extractable nutrients, indicating their availability status, shortage or excess, on the background of the N<sub>min</sub> temporary rating.  

Analysis of the moisture content of maize kernels in over-ripe plants

2006 ◽  
Vol 54 (4) ◽  
pp. 425-430
Author(s):  
T. Árendás ◽  
L. C. Marton ◽  
P. Bónis ◽  
Z. Berzsenyi
Keyword(s):  
Linear Regression ◽  
Moisture Content ◽  
Grain Yield ◽  
Equilibrium Moisture Content ◽  
Weather Conditions ◽  
Positive Correlation ◽  
Maize Grain Yield ◽  
Maize Grain ◽  
Maize Kernels

The effect of varying weather conditions on the moisture content of the maize grain yield was investigated in Martonvásár, Hungary from late August to late September, and from the 3rd third of September to the 1st third of Novemberbetween 1999 and 2002. In every year a close positive correlation (P=0.1%) could be observed between the moisture content in late September and the rate of drying down in October. Linear regression was used each year to determine the equilibrium moisture content, to which the moisture content of kernels returned if they contained less than this quantity of water in late September and harvesting was delayed. In the experimental years this value ranged from 15.24-19.01%.

Superimposition Effect of Film-mulching and Furrow Ridging Culture on Maize Grain Yield and WUE in Loess Plateau

2018 ◽  
Vol 44 (2) ◽  
pp. 268
Author(s):  
Jun-Hong XIE ◽  
Ling-Ling LI ◽  
Ren-Zhi ZHANG ◽  
Qiang CHAI
Keyword(s):  
Grain Yield ◽  
Loess Plateau ◽  
Maize Grain Yield ◽  
Film Mulching ◽  
Maize Grain
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