2,771 research outputs found
Effects of Cr and SiN contents on the microstructure and magnetic grain interactions of nanocomposite FePtCr-SiN thin films
No full textGermination, storage behaviour and cryopreservation of seeds of Champereia manilana (Opiliaceae) and Schefflera octophylla (Araliaceae)
No full text
1.5 V CMOS full-swing energy efficient logic (EEL) circuit suitable for low-voltage and low-power VLSI applications
No full textA 1.5 V CMOS high-speed 16-bit÷8-bit divider using the quotient-select architecture and true-single-phase bootstrapped dynamic circuit techniques suitable for low-voltage VLSI
No full textHistoric tree at Mission Carmel (San Carlos Borromeo de Carmelo) in Monterey, ca.1888
No full textPhotograph of the historic tree at Mission Carmel (San Carlos Borromeo de Carmelo) in Monterey, ca.1888. The tree stands at center, growing from the slope of a hill that feeds into the dry ravine at left. In the background left, the gaurd rail of a bridge can be seen.; "Viscaino hung bell on this tree and held mass in 1602 and Father Juniper Serra utilized it for the same purpose June 3, 1770 when he first landed to establish a mission for Saint Charles. [Also the boat was tied here.] The tree fell early in 1900 and the trunk was removed to the garden at rear of San Carlos Mission in Monterey. Photo made by a Mr. Adams [a photographer of Monterey about 1890] abt. 1880 and [negative] purchased from him about 1895 by C.C. Pierce". -- Unknown author
(20(3):66-74)A SINGLE ROW FIELD EXPERIMENT ON PINEAPPLE
No full text(一) 本試驗自民國56年秋季開始，目的在明瞭鳳梨採用單行密植時對平均果重與產量之影響，以為改進鳳梨栽培之依據。
(二) 參加試驗品系有正常開英與三菱系二種，栽植密度單行者行距固定90 cm，株距分15 cm、20 cm、25 cm三變級，另設畦距100 cm，行距50 cm,，株距30 cm雙列式栽培為對照，計8處理重複4次，採複因子隨機排列。
(三) 鳳梨植株生育情形：密植處理間株高及葉長以愈密植愈大，單行比雙行大，但葉數與葉寬則相反。品系問植株各部生長狀態，顯示正常開英均較三菱系佔優勢。
(四) 結實率：密植度之間隨密度之提高而減低，如第一、二回合計結實率雙行對照區(ck) 168%，單(C) 164.60%，單(B) 160.29%，單(A)143.16%，但除單行A處理因公頃理論株數高至77,777株，有明顯的減少外，其他差異不大。單行與雙行在同樣密度間無明顯差異。品系間第一回以三菱系較高，但第二回則以正常開英為高，第一、二回合計仍以正常開英161.99%為高，三菱系156.03%。
(五) 果實產量：密度間各年產量均隨密度提高而增加，依第一、二回合計產量單（A）區較（ck）增產26.30%，單（B）較（ck）增產14.64%，兩者均達極顯著差異標準，單（C）區反比（ck) 6.38%，但未達差異顯著標準。品系間差異極顯著，正常開英較三菱系可增產21.35%。
(六)換算公頃產量：八試項中以正常開英之單（A）密植度產量最高，公頃理論產量達140.410公噸，較三菱系之（ck）增產51%，其次正常開英之單（B）達130.847公噸，較正常開英（ck）增產17%，而三菱系之單（A)118.168公噸，正常開英之單（C)109,465公噸，三菱系之單(B)103.894公噸均依次較三菱系（ck）增產27%、17%及11%，但三菱系單（C）之82.253公噸反比三菱系（ck)93.180公噸減產12%。
(七)平均果重：密植處理間夏果平均果重隨密度的增加依次遞減，第一回夏果1.283~1.088公斤，第二回夏果1.327~1.134公斤，其中單(A)因過分密植，有明顯差異外，其他差異甚微。冬果平均果重似與密植毫無關係。品系間無論夏果或冬果均以正常開英較三菱系為重，差異極為顯著。
(八) 鳳梨裔芽及吸芽之發數，依本試驗結果與密植度似無關係，而品種間差異甚大，正常開英平均每株發生裔芽為1.65枚，吸芽0.89枚。三菱系每株產生裔芽5.99枚，吸芽0.58枚。
(九) 單行密植每公頃理論株數提高至77,777株雖仍可增產，但對夏果結實率及平均果重顯有減少趨勢。即以密度與雙行對照區相同的單（C）處理而論，產量雖經變方分析未達顯著標準，但以平均數觀之却較（ck）減產6.38％，由此可知鳳梨利用單行密植以達增產效果，須嚴選種苗大小一致外，尚待研究改進栽培之密度，以達增產，方為良策。
1. A Single row field experiment on pineapple was carried out in the Fall crop of 1967. The objective of this experiment was to increase average fruit weight and yield production of pineapple by growing pineapple in single rows.
2. Pincapple varieties used were normal smooth caynne and color of slips. Spacing between rows was fixed at 90 cm for a single row, while three levels of spacing namely, 15,20, and 25 cm were made between hills of a row. Two rows treatment with row spacing of 50 cm, hill spacing of 30 cm in bed width of 100 cm was also included as check. A total of eight treatments were arranged in a randomized complete block design, factorial experiment with 4 replications.
3. The plant height and the leaf length increased with increasing planting density The plant height and the leaf length of sigle row were larger than those of two rows. However, the number and width of leaf dereased with increasing planting density. The normal smooth caynne showed better growth than collor of slips.
4. The fruitage decreased with the increase of planting density. The average fruitage of plant and ratoon crops was two rows (check) 168%, single row (C) 164.60%, single row (B) 160.29%, single row (A) 143.16%. Execpt single row (A) treatment which fruitage decreased significantly be cause of the increase of the theoretical number of plants per ha to as high as 77,777 plants, no significant difference among other treatment was observed. Difference between the same spacing were also not significant in single and two rows treatments. Between the two varieties of pineapple, the plant crop fruitage of collar of shipe was higher than normal smooth caynne, but the ratoon crop fruitage of the latter was higher than the former. The average fruitage of normal smooth caynne 161.99% was higher than 156.03% of collor of slips.
5. Year fruit yield increased with the increase of planting density. The average yields of plant and yields of plant and ratoon crops of single row (A) was 26.30% higher than check treatment, those of single row (B), 14.64% higher than check treatment, differences were all highly significant. The yield of single row (C) was 6.38% lower than thnt of check, but the difference did not reach a significant level. Normal smooth caynne outyielded collor of slips by 21.35%, difference being highly significant.
6. Among 8 treatments, single row (A) of normal smooth caynne gave the highest yield, the theoretical yield per ha. teached 140.410 M. T. which was 51% higher than check treatment of collar of slips. The signle row (B) of normal smooth caynne gave 130.847 M.T. per ha. which outyield check treatment of color of slips by 40%. The single row (B) of color of slips yielded 118,168,456, and 103,849 M. T. per ha. respectively which were 27, 27, anb 11% higher than check treatment of collor of slips respectively. The single row (C) of collor of slips produced 82.253 M.T. per ha. which was 12% lower than check treatment of collor of slips which produce 93.180 M.T. per ha.
7. The mean weight of the summer fruit decreased 1,283-1,088 for plant crop and 1,327-1,134 kg for ratoon crop with the increase of planting density. However, The differences was significant only in the single row (A). The mean weight of the winter fruit appeared not related with planting density. Both mean weight of the summer and winter fruits of the normal smooth caynne was havier than that of collor of slips, the difference highly significant.
8. The number of slips and sucker were not affected by the planting density. but they differed greatly with Pineapple varieties. The numbers of slips and sucker were 1.65 and 0.89 for the normal smooth caynne while those for collor of slips, 5.99 and 0.58.
9. Although single planting can increase yield by increasing theoretical number of plant to as high as 77,777 plants per ha, its summer fruitage and mean fruit weight tended to decrease. When single row (C) was compared with the same planting density of two rows check treatment, its average yield was 7.62% lower than check although differences in yield failed to reach a significant level. Based on the results of this experiment, it appears not effective to increase yield through dense planting
Sterkte en vervorming van waterbouwasfaltbeton (I)
No full text-Bereiding van proefstukken waterbouwasfaltbeton op lab-schaal met een constante kwaliteit blijkt tot de mogelijkheden te behoren. Bij 7% bitumen kan de verdichting vermoedelijk lichter zijn dan de standaardmethode voor wegenbouwmengsels om een holle ruimteniveau van circa 4% te bereiken. Het is de vraag of dit ook bij 6, 5% bitumen het geval kan zijn. -Het kruip- en rekonderzoek geeft als duidelijke indicatie, dat de vervorming en S-modulus mede afhankelijk zijn van het type normaalspanning. Intensiever onderzoek, mede met het oog op de spreiding in resultaten, zal moeten uitwijzen, hoe die afhankelijkheid precies is. - Bij de bezwijkproeven blijkt de sterkte mede afhankelijk van het type normaalspanning. Dit is veel minder het geval bij de resulterende vervormingen. Als gevolg van beide is toch de S-modulus sterk afhankelijk van het feit, of deze met druk- of trekspanningen is bepaald. - Bij alle proeven blijkt de grote invloed van de temperatuur en vervormingssnelheid op het vervormingsgedrag en de sterkte. -Voor een betere interpretatie van de splijtproeven is het noodzakelijk de horizontale vervormingen te meten, zodat de S-modulus kan worden vastgesteld. - Het totaal aan stijfheidsmoduli geeft een band als "mastercurve". De met drukspanningen bepaalde waarden liggen in het algemeen op een hoger niveau dan de met trekspanningen bepaalde waarden. -Voor de bepaling van het hogere stijfheidsniveau moeten dynamische onderzoeksmethoden worden gehanteerd.TAW A4 Asfalttoepassinge
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