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Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 210
Author(s):  
Gilbert Koskey ◽  
Federico Leoni ◽  
Stefano Carlesi ◽  
Luciano Avio ◽  
Paolo Bàrberi

Relay intercropping is considered a valuable agroecological practice to increase and stabilize crop yields while ensuring the provision of several ecosystem services as well as sustainability and resilience to changing climatic conditions. However, farmers are still reluctant in the use of intercropping practices since there is a huge knowledge gap regarding the time of sowing, sowing ratio, crop stand density, and cultivar choice. In this study, we carried out a 3-year field experiment in Central Italy to assess the effect of relay intercropping on the agronomic performance and competitiveness of winter durum wheat (Triticum durum Desf. cv. Minosse) and spring lentil (Lens culinaris Medik. cv. Elsa) under a low-input management system, comparing different crop stand types (monocrop vs. intercrop) and target plant densities (350 plants m2—full dose vs. 116 plants m2—1/3 dose). The results revealed that intercropping increased grain yield compared to monocropping: significantly (p < 0.0001) against both monocrops in 2021 and non-significantly against durum wheat in 2019 and 2020. Yield advantage in both intercropping systems ranged between 164 and 648%. Durum wheat competitiveness was stronger in 2019 and 2021, while lentil was the most competitive component in 2020. Intercropping favored P accumulation in durum wheat shoots. There was no difference in grain yield of both crops between the highly- and lowly-dense system in 2020 and 2021. Both intercropping strategies were as effective as mechanical hoeing in controlling weeds and proved beneficial in stabilizing lentil productivity. Further economic analysis capturing the additional costs incurred in intercropping and mechanical weeding would highlight the magnitude of profitability of these systems.


2021 ◽  
Author(s):  
Paul Chaibva ◽  
Cecil Mugala ◽  
Veronica Makuvaro ◽  
Tavagwisa Muziri ◽  
Ignatius Chagonda ◽  
...  

Abstract The adoption of quinoa as a potential food crop in semi-arid Zimbabwe is threatened by poor seed establishment. A 4 x 3 factorial experiment arranged in a completely randomised design (CRD) was carried out to establish the effects of irrigation frequencies and different soil types on germination and early growth of quinoa. Three soil types (sand, loam, and clay) and four irrigation frequencies (after every 1, 2, 3, and 4 days) were used. Measurements taken included days to 50% emergence, germination percentage, mean germination time, germination rate index, coefficient velocity of germination, seedling height, final crop stand, and root density. Analysis of variance (ANOVA) was done using GenStat 18th Edition and mean separation was done using the Least Significant Difference (LSD) at a 5% significance level. There was an interaction between irrigation frequency and soil type on days to 50% emergence (p<0.05), germination percentage (p<0.05), germination rate index (p<0.05), seedling height (p<0.05), root length density (p<0.05), seedling crop stand (p<0.05). Sandy soil irrigated on 1-day intervals recorded the highest germination percentage (96.7%), while clay irrigated on 3-day intervals recorded the lowest (41.7%) final germination percentage respectively. Seeds planted in sand and clay recorded the shortest (3.25) and longest (4.5) mean germination time (days) respectively. Loamy and sandy soils irrigated on 3-day intervals and 1-day intervals recorded the lowest (29.4%) and highest (70.4%) germination rate index respectively. Loam soil irrigated on 1-day and 4-day intervals recorded the highest (16.37 cm) and shortest (9.3 cm) seedling height. Loam soil irrigated on 2-day and sandy soil irrigated on 3-day intervals recorded the lowest (3.07 cm/cm3) and the highest (21.23 cm/cm3) root length densities respectively. Sand irrigated on 1-day intervals recorded the highest (85%) crop stand. Findings concluded and recommended planting and frequently irrigating quinoa in sandy soils for better crop establishment.


2021 ◽  
Vol 2 (2) ◽  
pp. 142-147
Author(s):  
Azra Gandahi ◽  

The current study was conducted at Agronomy Section,Agriculture Research Institute, Tandojam during the growing season of 2019-20,toassess new oat genotypes for their growth performance under the environmental conditions of Tandojam. For this study, a total of eleven new oat genotypes along with one check genotypewere grown for their evaluation. A total of seven characters consistingcrop stand (m-2), plant height (cm), leaves plant-1, number of tillers plant-1, leaf area (cm-2), green fodderand dry mater yield (t ha-1)were investigated. The mean squares values for the investigated traits of all the genotypes were found significantly different(P≤0.05) among the genotypes, which showsthat these genotypes possess valuable genetic combinations for further improvements. Under the agro-climatic conditions of Tandojam, the maximum crop stand (96.66 m-2), greater green fodder (86.00 t ha-1) and alsomaximum dry matter yield (43.00 t ha-1) was produced by Entry-D; the Entry-H produced the tallest plants (96.66 cm) and maximum number of leaves plant-1(68.00). WhereasEntry-F produced maximum number of tillers plant-1 (17.66). Hence, these oat genotypes may be preferred for commercial cultivation in the tested climatic conditions. Regarding correlation results, the traits crop stand (r=0.93**), tillers plant-1 (r=0.39*) and leaf area (r=0.38*) showed significant and positive associations with green fodder yield, hence these characters may be given priority in high yielding oat cultivar development


2021 ◽  
Vol 4 (1) ◽  
pp. 1-14
Author(s):  
Nuru Seid Tehulie ◽  
Tarikua Fikadu ◽  
Jhon Hardy Purba

Production of mungbean has been increasing in Ethiopia because of its high importance as a source of protein and foreign exchange earnings. Determination of appropriate plant density for the varieties of mungbean can increase its productivity. Therefore, an experiment was conducted to determine the effect of inter and intra row spacing on growth, yield components and yield of mung bean varieties under irrigation. The treatments consisted of factorial combinations of three inter row spacing (30, 40, and 50 cm), three-intra row spacing (5, 10 and 15 cm) and two mungbean varieties (N-26 and MH-97) laid out in randomized complete block design with three Replications. The main effect of varieties, inter row spacing and intra row spacing was highly significant and significant on plant height, secondary branch and where the longest plant height (41.71 cm) was for variety MH-97 and from 5 cm intra row spacing, respectively and maximum number of secondary branch was recorded for variety MH-97 (8.91) and from 15cm intra row and 50cm inter row spacing, respectively.  The interaction effect of the variety, inter and intra row spacing was highly significant on number of primary branch per plant, number of pod per plant and crop stand count percentage where the highest number of primary branches (7.00) was recorded from variety MH-97 at 50 cm inter row spacing and highest number pods per plant (30.15) were recorded for variety MH-97 at 40 cm inter row and (31.34) at 15cm intra row spacing. Where the highest crop stand count at harvest were recorded from variety MH-97  (97.00%) at 40 cm inter row spacing .The main effect of inter row spacing and intra row spacing were highly significant and significant on above ground dry biomass and the highest above ground dry biomass at inter row spacing of 30 cm ( 5968.8 kg ha-1) and intra row spacing 5cm 6145.9 kg ha-1).The main effect of variety, inter-row and intra-row spacing were highly significant on harvest index and grain yield where the highest harvest index was from variety MH-97 (20.91%), inter row spacing of 40 cm which give (21.18%) and intra row spacing 10 cm which give  (20.30%) and the highest grain yield from Variety MH-97 (1117.94 kg ha-1), inter row spacing 40 cm (1213.75 kg ha-1) and intra row spacing 10 cm which give (1151.67 kg ha-1) However, this tentative generalization based one season at one location requires further studies over years and locations to give a valid recommendation.


2021 ◽  
Vol 37 (2) ◽  
Author(s):  
Arsalan Khan ◽  
Aminullah Khan ◽  
Dil Fayaz Khan ◽  
Sajid Khan ◽  
Anjum Anjum ◽  
...  

2020 ◽  
Vol 200 ◽  
pp. 377-390
Author(s):  
Alimohammad Shirzadifar ◽  
Mohammadmehdi Maharlooei ◽  
Sreekala G. Bajwa ◽  
Peter G. Oduor ◽  
John F. Nowatzki

2020 ◽  
Vol 71 (2) ◽  
pp. 77-85
Author(s):  
Agnieszka Klimek-Kopyra ◽  
Reinhard W. Neugschwandtner ◽  
Tomasz Gląb ◽  
Andrzej Oleksy ◽  
Tadeusz Zając

SummaryEcological intensification of crop production involves the use of intercrops and the rational use of inoculation and fertilization in case of intercrops including legume species. The root system plays an important role in the productivity of crops. Therefore, effects of the inoculation treatments (Nitragina) or foliar fertilization (Photrel) or a combination of both were assessed on root parameters of pea grown as pure stand or intercrops with linseed or wheat in a 3-year experiment in Poland. Crop stand composition influenced the root parameters of pea with a higher root length density (RLD) in the root fractions of 0.1–1 mm of pea in pea/linseed intercrops than in the pure stand, a higher mean root diameter (MRD) in pure pea and intercrops of pea with linseed than with wheat, and also a tendency of a higher root dry matter (RDM) in pure pea and pea/linseed than in pea/wheat in 2 out of the 3 years. RLD was higher with Photrel than with Nitragina in root fractions of 0.1–0.5 mm. Treatments did not affect the MRD, but a combination of Nitragina + Photrel increased the RDM in 1 year. Intercropping of pea with linseed and the application of a foliar fertilizer might be a strategy to improve pea root characteristics.


2020 ◽  
Vol 12 (1) ◽  
pp. 59-65
Author(s):  
Somanth Sardar ◽  
Manasi Patra ◽  
Bappa Mandal ◽  
B. C. Patra

Transplanting is the technique of moving of a plant from one location to another. This strategy is commonly practiced to establish crops when conditions are less favourable for direct seeding.  Birds and squirrels damage to seedlings of maize is a serious problem resulting in poor crop stand and low yield. Delayed germination and plant growth receives a major setback due to late sowing of maize which reduces grain yield; however, reduction of yield can be compensated by transplantation technique. Transplanting of maize is a strategy that can be used to achieve optimum plant densities, better crop stand and obviously to get optimum yield. It reduces the nutrient requirement and also shortens the growth period of crop that helps farmers to harvest a third crop in intensive cropping system. Transplanted crop produces about 15.44% higher grain yield and can be harvested 10-12 days earlier that of direct seeding crop, so, late maturity high yielding cultivars can be fitted in to available growing season. Though, there are several advantages of transplanted maize, it is not popular in India due to lack of awareness, lacking in proper rational scientific technology and very little information about age of seedling and optimum dose of nutrient. Farmers can be benefitted if proper technology regarding age of seedling, process of transplanting and other cultivation techniques of raising transplanted maize is supplied to them.


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