Optimal crop planting pattern can be harmful to reach carbon neutrality: Evidence from food-energy-water-carbon nexus perspective

2022 ◽  
Vol 308 ◽  
pp. 118364
Liuyue He ◽  
Zhenci Xu ◽  
Sufen Wang ◽  
Jianxia Bao ◽  
Yunfei Fan ◽  
1997 ◽  
Vol 11 (3) ◽  
pp. 515-519 ◽  
Julio A. Scursoni ◽  
Emilio H. Satorre

The objective of this paper was to evaluate the effect of preplant applications of trifluralin on barley stand and yield, and control of grass weeds in field experiments during 1992 and 1993. Factors examined were: (1) crop planting patterns (conventional drill with rows 15 cm apart and deep-seeder drill with rows 25 cm apart), (2) herbicide application times (22 d before sowing and immediately before sowing), and (3) herbicide application. During 1993, hand-weeded plots also were established. Trifluralin applied preplant at 528 g ai/ha reduced weed density and biomass. Weed control was higher under conventional planting than under the deep planting pattern, and there was no effect of the time of application on herbicide efficacy. There was no herbicide injury to the crop, and grain yield was higher in treated than in untreated plots due to successful weed control.

Weed Science ◽  
1995 ◽  
Vol 43 (1) ◽  
pp. 88-94 ◽  
Emilie E. Regnier ◽  
Kufimfutu B. Bakelana

Field studies were conducted to determine the effects of cultivated oats planting pattern on early canopy shape and growth of cultivated oats and wild oats, in part to test the assumption of radial plant canopy expansion on which previous theoretical models of crop-weed interference models have been based. Cultivated oats density was kept constant as the pattern rectangularity was varied, and single wild oats plants were centered within each pattern. Individual plant canopies, photographed from above 31 days after emergence (DAE), were radial for wild oats in all crop planting patterns and for cultivated oats planted in triangular and square planting patterns. Canopy radius perpendicular to the crop row axis in rectangular patterns was similar to canopy radius along the same cardinal axis in equidistant patterns, but was reduced along the crop row axis, resulting in a rectangular canopy shape and decreased canopy area in rectangular compared to equidistant patterns. Cultivated oats dry weight and leaf area at crop flowering (64 DAE) also decreased with increasing rectangularity of crop planting pattern. Reductions in cultivated oats growth in rectangular patterns were associated with earlier intraspecific interference and delayed crop canopy closure in rectangular compared to equidistant patterns. Wild oats leaf area and tiller number 64 DAE decreased with more equidistant crop planting patterns, consistent with reduced canopy area 31 DAE and earlier crop canopy closure in equidistant patterns. The data suggest that individual oats canopy expansion during early growth is essentially radial and also support previous theoretical predictions of crop planting pattern effects on weed suppression.

2019 ◽  
Vol 49 (1) ◽  
pp. 1-12
Sharae Deckard

2020 ◽  
Shogo Mori ◽  
Takahiro Aoki ◽  
Kaliyamoorthy Selvam ◽  
Shunichi Fukuzumi ◽  
Jieun Jung ◽  

Despite the continuing popularity of radical reactions in organic synthesis, much remains to be explored in this area. Herein, we describe how spatiotemporal control can be exerted over the formation and reactivity of divergent exchangeable formamide radicals using nickel complexes with a semiconductor material (TiO<sub>2</sub>) under irradiation from near-UV–Vis light. Depending on the bipyridine ligand used and the quantity of the nickel complex that is hybridized on or nonhydridized over the TiO<sub>2</sub> surface, these radicals selectively undergo substitution reactions at the carbon center of carbon–bromine bonds that proceed via three different pathways. As the scalable production of formamides from CO<sub>2</sub> does not produce salt waste, these methods could add a new dimension to the search for carbon neutrality through the indirect incorporation of CO<sub>2</sub> into organic frameworks.

Agrotek ◽  
2018 ◽  
Vol 2 (4) ◽  
R. Milyaniza Sari ◽  
Supri Hadi

Intention of� this research� is to determine of� agriculture prime commodities of South Buru Regency. The observation was focussed to know potensial area to development agriculture harvesting/cattle.� This paper aims to examine the implementation of LQ approach uses wide of �agriculture harvesting/cattle population series data for five year period (2005-2009) from South Buru Regency as main source. The result of study showed that there was most of sub regency in South Buru regency have the same of prime commodities, and several sub regency have specific prime commodities. The number of prime commodities to the sub sector food crop agriculture are 6, prime commodities to sub sector vegetables and fruits planting are 18, prime commodities to the sub sector tree crop planting are 5� and prime commodities to sub sector husbandry /breeding are 5 commodities.

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