Simulating Regional Crop Growth and Yield by Using GIS-based EPIC Model

Book review

Acta Agronomica Hungarica ◽

10.1556/aagr.51.2003.3.15 ◽

2003 ◽

Vol 51 (3) ◽

pp. 369

Author(s):

Z. Berzsenyi

Keyword(s):

New York ◽

Mathematical Models ◽

Crop Growth ◽

Growth And Yield ◽

Madison Avenue

A. R. Overman and R. V. Scholtz III.: Mathematical Models of Crop Growth and Yield. Marcel Dekker, 270 Madison Avenue, New York, NY 10016. 2002. Hardcover, 344 pp., 150.00. ISBN 0-8247-0825-3.

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Growth and Yield of Flax (Linum usitatissimum) Injured by Trifluralin

Weed Science ◽

10.1017/s0043174500051912 ◽

1992 ◽

Vol 40 (3) ◽

pp. 460-464

Author(s):

Ken M. Nawolsky ◽

Ian N. Morrison ◽

George M. Marshall ◽

Allen E. Smith

Keyword(s):

Stem Elongation ◽

Crop Growth ◽

Growth And Yield ◽

Flax Seed ◽

Growing Seasons ◽

Matter Production ◽

Initial Injury ◽

Net Assimilation ◽

Bud Initiation ◽

Number Of Branches

The relationships between the actual amount of spring-applied trifluralin detected in soil at seeding, initial injury to flax, and crop growth and yield were investigated in southern Manitoba over three growing seasons. As the amount of trifluralin in the soil increased, flax density and dry matter production decreased, such that at a soil concentration equivalent to 1 kg ai ha−1trifluralin, the two were reduced by 40 and 49%, respectively. Recovery from early-season injury was characterized by enhanced crop growth rates (CGRs) and net assimilation rates (NARs) of surviving plants during the remainder of the growing season. Maximum recovery occurred in plots where trifluralin levels in the soil were between 0.8 and 1 kg ha−1at seeding. During the interval between stem elongation and bud initiation, CGRs and NARs of flax in the trifluralin-treated plots exceeded those of flax in the untreated plots by up to 1.5 and 1.2 times, respectively. Additionally, the number of branches per plant increased linearly as trifluralin amounts in the soil increased. Flax seed yield was decreased by trifluralin as described by the equation: flax seed (% of untreated control) = 104.9 - 13.3[trifluralin detected (kg ha−1) at seeding]. Based on this equation, trifluralin levels in the soil of up to 0.7 kg ai ha−1caused less than a 5% reduction in flax yield under weed-free conditions.

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Growth and yield of wheat at different dates of sowing under chrland ecosystem of Bangladesh

Journal of the Bangladesh Agricultural University ◽

10.3329/jbau.v14i2.32688 ◽

2017 ◽

Vol 14 (2) ◽

pp. 147-154 ◽

Cited By ~ 1

Author(s):

MM Kamrozzaman ◽

MAH Khan ◽

S Ahmed ◽

N Sultana

Keyword(s):

Growth Rate ◽

Leaf Area Index ◽

Leaf Area ◽

Dry Matter ◽

Block Design ◽

Grain Filling ◽

Crop Growth ◽

Growth And Yield ◽

Area Index ◽

Crop Growth Rate

An experiment was conducted at Sadipur charland under Farming System Research and Development Site, Hatgobindapur, Faridpur, during rabi season of 2012-13 and 2013-14 to study the growth and yield performance of cv. BARI Gom-24 as affected by different dates of sowing under Agro-ecological Zone-12 (AEZ-12) of Bangladesh. The experiment was laid out in randomized complete block design with six replications, comprising five different dates of sowing viz. November 5, November 15, November 25, December 5 and December 15. Results reveal that the tallest plant, leaf area index, total dry matter, and crop growth rate were observed in November 25 sown crop and leaf area index, total dry matter and crop growth rate were higher at booting, grain filling, and tillering stages of the crop. Maximum effective tillers hill-1 (3.49), spikes m-2, (311), number of grains spike-1 (42.20) and 1000-grain weight (52.10 g) were produced by November 25 sown crop exhibited the highest grain (4.30 t ha-1) and straw yield (4.94 t ha-1) as well as harvest index (46.88%) of the crop. Lowest performance was observed both in early (November 5) and late sown crop (December 15). The overall results indicated that November 25 sown crop showed better performance in respect of growth and yield of wheat under charland ecosystem of Bangladesh.J. Bangladesh Agril. Univ. 14(2): 147-154, December 2016

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Compost Effects on Crop Growth and Yield in Commercial Vegetable Cropping Systems

Compost Utilization In Horticultural Cropping Systems ◽

10.1201/9781420026221.sec2 ◽

2001 ◽

Cited By ~ 1

Author(s):

Nancy Roe

Keyword(s):

Cropping Systems ◽

Crop Growth ◽

Growth And Yield

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Growth and Yield Performance of Cowpea (Vigna Unguiculata (L.) Walp) as influenced by Row-Spacing and Period of Weed interference in South-West Nigeria

Journal of Agricultural Science ◽

10.5539/jas.v6n4p188 ◽

2014 ◽

Vol 6 (4) ◽

pp. 188 ◽

Cited By ~ 3

Author(s):

Joseph Adigun ◽

A. O. Osipitan ◽

Segun Toyosi Lagoke ◽

Raphael Olusegun Adeyemi ◽

Stephen Olaoluwa Afolami

Keyword(s):

Grain Yield ◽

Vigna Unguiculata ◽

Growth Parameter ◽

Crop Growth ◽

Growth And Yield ◽

Row Spacing ◽

Grain Yields ◽

Weed Interference ◽

Weed Infestation ◽

Weed Removal

Weed problem appears to be the most deleterious factor causing between 25 and 60% reduction in potential yield of cowpea. Field trials were therefore conducted to study the effect of inter-row spacing and period of weed interference on growth and yield of cowpea (Vigna unguiculata (L) Walp) at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta (07° 15'; 03° 25' E) in South Western Nigeria during the early and late wet seasons of 2009. The experiment consisted of eight main plots of weed interference which included initial weed removal for 3, 6, 9, and 12 weeks after sowing (WAS) and subsequently weed –infested until harvest as well as initial weed infestation for corresponding periods and thereafter kept weed free until harvest. There were also sub-plot treatments of three inter-row spacing of 60, 75, and 90 cm. All treatments in different combinations were laid out in a split-plot design with three replications. In both trials, the use of inter-row spacing of 60 cm resulted in significant reduction in weed growth as evident in lower weed dry matter production and subsequent higher cowpea pod and grain yields than those of 75 and 90 cm inter-row spacing. Initial weed infestation of up to 3 WAS did not have any adverse effect on crop growth and cowpea grain yields provided the weeds were subsequently removed. On the other hand, cowpea grain yield loss was not significantly averted by keeping the crop weed free for only 3 WAS without subsequent weed removal. In this study, initial weed-infestation for 6 WAS and beyond significantly depressed various crop growth parameter and cowpea grain yield compared with the crop kept weed free throughout its life cycle. In order to obtain optimum yields similar to that of the weed free cowpea field, it was required to keep the crop weed free for 6 WAS and beyond. However, frequent weeding beyond 9 weeks after sowing did not improve cowpea yield significantly and as a matter of fact it may even result in reduction of cowpea grain yield due to mechanical damage of hoe weeding. The practical implication of this finding is that early weeding starting from 3 WAS is very crucial for cowpea production while the critical period of weed removal for optimum yield in cowpea is between 3 and 9 WAS in the forest-savannah transitional zone of south Western Nigeria.

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Determinants of crop growth and yield in a changing climate.

Rainfed agriculture: unlocking the potential ◽

10.1079/9781845933890.0073 ◽

2009 ◽

pp. 73-80

Author(s):

P. K. Aggarwal

Keyword(s):

Crop Growth ◽

Growth And Yield ◽

Changing Climate

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Comparative study of different organic mulches for increased wheat productivity district Faisalabad, Punjab, Pakistan

International Journal of Agricultural Extension ◽

10.33687/ijae.009.03.3598 ◽

2021 ◽

Vol 9 (3) ◽

Author(s):

Ahmad Raza ◽

Muhammad Nawaz ◽

Muhammad U. Chattha ◽

Imran Khan ◽

Muhammad B. Chattha ◽

...

Keyword(s):

Grain Yield ◽

Crop Growth ◽

Grain Weight ◽

Growth And Yield ◽

Straw Mulch ◽

Nitrogen Levels ◽

Major Threat ◽

Biological Yield ◽

1000 Grain Weight ◽

Sorghum Straw

Weeds are major threat to global wheat production and cause serious threat to food security. Likewise, water scarcity is also a major threat to food production and its intensity is continuously soaring up across the globe. Organic mulches have potential to reduce weeds growth and conserve the soil moisture thus ensures the better crop growth and yield. Therefore, present study was conducted to compare the performance of different organic mulches in improving wheat growth and productivity. The study was comprised of different organic mulches; M1= No mulch (control) M2= maize straw mulch, M3= wheat straw mulch, M4= sorghum straw mulch and M5= rice straw mulch and three nitrogen levels N1 = 90 kg, N2 = 120 kg and N3= 150 kg/ha. The results indicated that both organic mulches and N rates had significant impact on growth, and yield traits. The maximum leaf area index (LAI), crop growth rate (CGR), productive tillers (307 m-2), grains/spike (46.22), 1000 grain weight (42.33 g) biological yield (13.76 t/ha) and grain yield 4.75 t/ha was obtained with sorghum straw mulch and minimum productive tillers (255.33 m-2), grains/spike (36.22), biological yield (11.46 t/ha) and grain yield (3.59 t/ha) was recorded in no mulch (control). Among nitrogen levels maximum productive tillers (290.6 m-2), grains/spike (42.80), 1000 grain weight (40.65 g), biological yield (13.44 t/ha) and grain yield (4.32 t/ha) was obtained with 150 kg/ha N and minimum productive tillers (274 m-2), grains/spike (38.13), 1000 grain weight (36.94 g) biological yield (11.98 t/ha) and grain yield (3.90 t/ha) was obtained with 90 N kg/ha. Thus, farmers can use sorghum straw mulch and N (150 kg ha-1) to improve the wheat productivity. However, farmers must be educated by government institute and adoptive research farms in order to understand and adaption of this approach.

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