scholarly journals Legacy effects of soil fertility management on cereal dry matter and nitrogen grain yield of organic arable cropping systems

2021 ◽  
Vol 122 ◽  
pp. 126169
Author(s):  
Johannes Wilhelmus Maria Pullens ◽  
Peter Sørensen ◽  
Bo Melander ◽  
Jørgen Eivind Olesen
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Dry Matter ◽  
Cropping Systems ◽  
Legacy Effects ◽  
Soil Fertility Management ◽  
Fertility Management

scholarly journals Influence of Crop Rotation and Soil Fertility Management Strategies on Water Use Efficiency of Wheat in a Changing Climate in Njoro Sub-County in Kenya

2020 ◽  
pp. 59-76
Author(s):  
P. A. Ooro ◽  
R. J. Birech ◽  
J. N. Malinga ◽  
E. Thuranira ◽  
C. Digo ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Water Use Efficiency ◽  
Ammonium Nitrate ◽  
Crop Rotation ◽  
Water Use ◽  
Water Harvesting ◽  
Soil Fertility Management ◽  
Fertility Management ◽  
Use Efficiency

Aims: The study determined the effect of soil fertility management (inorganic and organic N sources) and short term crop rotation (cereal – legumes cropping systems) on water use efficiency of wheat in high potential areas. Study Design: A randomized complete block design was used with split-split-plot arrangement replicated three times. Three factors evaluated included water harvesting (WH), crop rotation (CR) and soil fertility management (SFM). The data obtained were subjected to an analysis of variance (ANOVA) using Genstat statistical package while the mean separation was performed using least significance differences (P =.05). Place and Duration of Study: The trial was conducted at the Kenya Agricultural and Livestock Research Organization (KALRO) fields based in Njoro for three years between 2014 and 2016 during rainy seasons. Methodology: Water harvesting was evaluated at consisted of flat beds (WH1) and tied ridges (WH2), crop rotation was tested at four levels comprising of Wheat- Dolichos lablab (Lablab purpureum)-Wheat- L. purpureum (CR1); Wheat-Greenpea (P. sativum) –Wheat (Triticum aestivum L)- P. sativum (CR2); T. aestivum L-potato- P. sativum –Potato (Solanum tuberosum) (CR3); and Wheat-Wheat-Wheat-Wheat) (CR4). Six different soil fertility management (SFM) strategies evaluated included SFM1 = untreated control; SFM2 = Farm Yard Manure at 5 t ha-1; SFM3 = Green manure (L.eucaena triachandra) at 2.5 mt ha-1; SFM4 = Calcium Ammonium Nitrate (CAN) at 25 kg N ha-1; SFM5 = Calcuim Ammonium Nitrate at 50 kg N ha-1; and SFM6 = Ammonium Nitrate (CAN) at 75 kg N ha-1. The Water harvesting (WH) and SFM were fixed on the same plot at the form and rate for the entire period of the study while crops were rotated between seasons. Water use efficiency was derived as a ratio of water use and grain yield and biomass. Results: Results revealed significant (P =.05) effect of crop rotation and soil fertility management on water use efficiency. However, water harvesting did not influence. While interaction of CR and SFM significantly (P =.05) influenced WUE and grain yield. Significant influence was also observed on WUE due to an interaction between WH and SFM. Dolichos lablab (L. purpureum) and green pea as pre-crops resulted in higher yield than when potato was the pre-crop and continuous wheat.  Use of inorganic N fertilizer with L. purpureum as a pre-crop resulted in higher grain yield than all other soil fertility management strategies evaluated. In conclusion, the use of green pea as a pre-crop during the short rain followed by wheat in long rains is a beneficial crop rotation systems and a climate smart strategy. In addition, organic N sources should be recommended for sustainable wheat production because it will positively influence the accumulation and slow release of soil moisture for increased water use efficiency.

scholarly journals VERIFICATION OF INTEGRATED SOIL FERTILITY MANAGEMENT AND WEED INTERFERENCE ON NERICA RICE IN THE GUINEA SAVANNA UPLANDS

2017 ◽  
Vol 5 (3) ◽  
pp. 252-265
Author(s):  
I.K. Dzomeku ◽  
I. K. Amegbor ◽  
P. Ayittah
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Soil Amendment ◽  
Organic Manure ◽  
Soil Fertility Management ◽  
Integrated Soil Fertility Management ◽  
Weed Interference ◽  
Fertility Management ◽  
Full Rate ◽  
Hand Weeding

Improving soil amendment and reducing weed-crop competition in rice cultivation could increase production of the crop under upland conditions. A field study was conducted to verify integrated soil fertility management and weed interference on NERICA 1 in the Guinea savannah uplands of Ghana to determine their interactive effects and examine the synergy between organic and inorganic soil amendments on yield components and grain yield. Four levels of soil amendment and six weeding regimes laid in Randomized Complete Block Design with four replications were studied. Results indicated full rate of NPK (60-60-30 kg/ha) combined with hand weeding at 3 and 6WAP maximized most growth and yield parameters of NERICA 1 with grain yield of 3000kg/ha. The same treatments minimized weed index (WI) followed by weeding once at 3WAP when combined with either full dose of NPK or organic manure. The best timing for one hand weeding as practiced by some farmers was 3WAP to obtain appreciable yield in rice. Tillering at 50 DAP and productive tillering were maximised by both full rate of NPK and half doses of NPK and organic manure applications with 250 tillers/m2 respectively 200 productive tillers/m2. The synergy between inorganic and organic manure at half doses was exemplified and could be exploited by farmers for increased crop performance. Full rate of NPK maximised LAI and straw biomass followed by half doses of manure and NPK fertilizer. Notably twice weeding at 3 and 6 WAP recorded the highest LAI, tillering and productive tillers, and reduced straw biomass only by 20% relative to the weed-free control. 1000 seed weight of NERICA 1 was reduced only by weedy control below 25g, even in the presence of soil amendments. Weed flora was dominated by annuals and consisted of 55% broadleaves, 25% grasses, 12% shrubs and 6% sedges.

Soil fertility management in indigenous homegardens of Central Amazonia, Brazil

2017 ◽  
Author(s):  
Mateus Vieira da Cunha Salim ◽  
Robert Pritchard Miller ◽  
César A. Ticona-Benavente ◽  
Johannes van Leeuwen ◽  
Sonia Sena Alfaia
Keyword(s):  
Soil Fertility ◽  
Soil Fertility Management ◽  
Fertility Management ◽  
Central Amazonia
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