Journal ArticleDOI
Path coefficient analysis of N nutrition on yield and yield components for rice in a highly percolating soil
TLDR
In this paper, a statistical procedure of path coefficient analysis was applied to the data pertaining to grain yield, yield parameters, and N uptake during different periods of rice growth, in three field experiments.Abstract:
Data pertaining to grain yield, yield parameters, and N uptake during different periods of rice growth, in three field experiments, were subjected to the statistical procedure of path coefficient analysis. The observed grain yield response to the applied fertilizer N was predominantly reflected in an increased panicle density and spikelet number. The 1,000‐grain weight was only slightly influenced by N fertilization. Since both panicle density and spikelet number are known to be largely determined within 70 days after transplanting (DAT), N uptake during this ‐period was found to be critical to achieve a maximum grain yield response to applied N. The K uptake during 0–40 DAT correlated positively with panicle density, whereas absorption of N during 40–70 DAT determined both panicle density and spikelet number. Since N uptake during 0–20 DAT exerted a significant positive influence on grain yield through increased panicle density, the basal application of a part of fertilizer at the time of transp...read more
Citations
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Journal ArticleDOI
Nitrogen losses and fertilizer N use efficiency in irrigated porous soils
Milkha S. Aulakh,Bijay-Singh +1 more
TL;DR: In this paper, the authors show that up to 50% of the applied N may be lost via nitrification-denitrification in irrigated porous soils under wetland rice.
Journal ArticleDOI
Deep placement of urea supergranules in transplanted rice: Principles and practices
N. K. Savant,P. J. Stangel +1 more
TL;DR: In this article, supergranules of urea (USG) were used in place of mudballs containing urea fertilizer to achieve the same agronomic benefits as achieved through the Japanese concept of deeppoint placement of fertilizer N in transplanted rice.
Journal ArticleDOI
Efficient Management of Primary Nutrients in the Rice-Wheat System
Yadvinder Singh,Bijay Singh +1 more
TL;DR: In this article, a better understanding of the nutrient economy in relation to productivity is immensely important to develop a sustainable rice-wheat cropping system in the Indo-Gangetic plain (IGP).
Journal ArticleDOI
Effect of Different levels of Nitrogen on Growth and Yield of Rice (Oryza sativa L.) Cultivars under Terai-agro Climatic Situation
Biswajit Saha,Parimal Panda,P. S. Patra,Ranajit Panda,Arindam Kundu,A.K. Singha Roy,Nabakishor Mahato +6 more
TL;DR: The cultivation of rice is of immense important to food security of Asia, where more than 90% of the global rice is produced and consumed.
Journal ArticleDOI
Effect of granule size and the placement geometry on the efficiency of urea supergranules for wetland rice grown on a permeable soil
TL;DR: In this paper, it was observed that leaching losses of urea supergranules (USG)-N could be decreased by about 20% by the placement of four 0.25 g granules at four points instead of one 1 g granule at one point.
References
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Journal ArticleDOI
Fate and efficiency of nitrogen fertilizers applied to wetland rice. II. Punjab, India
TL;DR: In this paper, two modified urea products (urea supergranules [USG] and sulfur-coated urea [SCU]) were compared with conventional urea and ammonium sulfate as sources of nitrogen (N), applied at 58 kg N ha−1 and 116 kg N h−1, for lowland rice grown in an alkaline soil of low organic matter and light texture (Typic Ustipsamment).
Journal ArticleDOI
A Path Coefficient Analysis of Some Yield Component Interrelations in Field Beans (Phaseolus vulgaris L.)1
Rodrigo Duarte,M. W. Adams +1 more
Book ChapterDOI
Physiology of The Rice Plant
TL;DR: This chapter emphasizes the nutritional physiology of the rice plant from the agronomic point of view, as a result of the introduction of new high-yielding varieties, the condition of the soil became a factor limiting yield.