scholarly journals Stabilizing crop productivity returns and soil improvement by agroforestry practices under marginal lands in semi-arid tropics of Telangana state, India

2017 ◽  
Vol 12 (2) ◽  
pp. 290-295
Author(s):  
A. KRISHNA ◽  
M.A. AARIFF KHAN ◽  
B. JOSEPH
Keyword(s):  
Soil Improvement ◽  
Crop Productivity ◽  
Marginal Lands ◽  
Telangana State ◽  
Semi Arid ◽  
Agroforestry Practices

scholarly journals CLIMATE VARIABILITY AND CHANGE: FARMER PERCEPTIONS AND UNDERSTANDING OF INTRA-SEASONAL VARIABILITY IN RAINFALL AND ASSOCIATED RISK IN SEMI-ARID KENYA

2011 ◽  
Vol 47 (2) ◽  
pp. 267-291 ◽  
Author(s):  
K. P. C. RAO ◽  
W. G. NDEGWA ◽  
K. KIZITO ◽  
A. OYOO
Keyword(s):  
Climate Variability ◽  
Crop Production ◽  
Smallholder Farmers ◽  
Crop Productivity ◽  
General Tendency ◽  
Climate Variability And Change ◽  
Negative Impacts ◽  
Probabilistic Nature ◽  
Semi Arid

SUMMARYThis study examines farmers’ perceptions of short- and long-term variability in climate, their ability to discern trends in climate and how the perceived trends converge with actual weather observations in five districts of Eastern Province in Kenya where the climate is semi-arid with high intra- and inter-annual variability in rainfall. Field surveys to elicit farmers’ perceptions about climate variability and change were conducted in Machakos, Makueni, Kitui, Mwingi and Mutomo districts. Long-term rainfall records from five meteorological stations within a 10 km radius from the survey locations were obtained from the Kenya Meteorological Department and were analysed to compare with farmers’ observations. Farmers’ responses indicate that they are well aware of the general climate in their location, its variability, the probabilistic nature of the variability and the impacts of this variability on crop production. However, their ability to synthesize the knowledge they have gained from their observations and discern long-term trends in the probabilistic distribution of seasonal conditions is more subjective, mainly due to the compounding interactions between climate and other factors such as soil fertility, soil water and land use change that determine the climate's overall influence on crop productivity. There is a general tendency among the farmers to give greater weight to negative impacts leading to higher risk perception. In relation to long-term changes in the climate, farmer observations in our study that rainfall patterns are changing corroborated well with reported perceptions from other places across the African continent but were not supported by the observed trends in rainfall data from the five study locations. The main implication of our findings is the need to be aware of and account for the risk during the development and promotion of technologies involving significant investments by smallholder farmers and exercise caution in interpreting farmers’ perceptions about long-term climate variability and change.

Simulating Crop Productivity in a Triple Rotation in the Semi-arid Area of the Aral Sea Basin

2019 ◽  
Vol 14 (2) ◽  
pp. 273-285 ◽  
Author(s):  
Nazar Ibragimov ◽  
Yulduzoy Djumaniyazova ◽  
Jamila Khaitbaeva ◽  
Shirin Babadjanova ◽  
Jumanazar Ruzimov ◽  
...  
Keyword(s):  
Crop Productivity ◽  
Arid Area ◽  
Aral Sea ◽  
Aral Sea Basin ◽  
Semi Arid

Ecohydrology of CAM plants: environmental co-benefits for agroecosystems

2020 ◽  
Author(s):  
Amilcare Porporato ◽  
Samantha Hartzell
Keyword(s):  
Arid Regions ◽  
Carbon Assimilation ◽  
Biofuel Production ◽  
Productivity Index ◽  
Cam Plants ◽  
Marginal Lands ◽  
C3 Photosynthesis ◽  
Consistent Basis ◽  
Reduced Water ◽  
Semi Arid

<p>In spite of their potential as low input crops in arid and semi-arid regions, limitations in CAM (Crassulacean Acid Metabolism) modeling have made it difficult to compare the productivity and water use of CAM crops with their C3 and C4 counterparts on a consistent basis. Using the Photo3 model, which adds a malic acid storage and circadian rhythm to the widely accepted Farquhar et al. model for C3 photosynthesis, we analyze the coupling of CAM carbon assimilation and transpiration with the soil-plant-atmosphere continuum at an hourly timescale to explore the potential of prickly pear and agave in several semiarid locations. Model results are compared with experimental data and contrasted with results generated using the widely used and empirically based Environmental Productivity Index introduced by Park Nobel in 1980. Using model results for CAM as well as C3 and C4 species, we explore how agricultural productivity in these locations may be optimized by diversifying planting strategies among the three photosynthetic pathways. This work aims to assist in better understanding the potential of CAM for food and biofuel production in arid and semiarid regions of the world accounting also for environmental co-benefits related to enhanced carbon sequestration and reduced water demand in semi-arid, marginal lands.</p><p> </p>

Perceived benefits and constraints analysis of ‘VASAT’ an ‘ICT’ initiative in India

2017 ◽  
Vol 37 (03) ◽  
Author(s):  
P. Ganesh Kumar ◽  
G. Prasad Babu
Keyword(s):  
Andhra Pradesh ◽  
Crop Productivity ◽  
Video Conference ◽  
Exploratory Research ◽  
Perceived Benefits ◽  
Web Based ◽  
Advisory Service ◽  
Farming Community ◽  
Agriculture Development ◽  
Semi Arid

Present day Indian farming community is facing a multitude of problems to maximize crop productivity. ICTs play an important role in information between and among stake holders in agriculture. There is huge potential to harness ICT for agriculture development. VASAT (Virtual Academy for Semi-Arid Tropics) was initiated in Mahboobnagar district of Andhra Pradesh by ICRISAT. Exploratory research design was adopted to know perceived benefits and constraints in utilizing the project services by the farmers. Web based agro advisory service was important service that was ranked first with cent percent accessibility. Agro advisory through video conference was ranked second with 52 per cent accessibility. Other services are accessible but less often. In terms of utility web based agro advisory was utilized by 64 per cent followed by agro advisory through video conference utilized by 28 per cent. Overall satisfaction of farmers towards services of VASAT was rated low by 50 per cent and as very low by another 40 per cent.

The Influence of Tillage Frequency on Crop Productivity in Sub-Tropical to Semi-Arid Climates

2018 ◽  
Vol 21 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Mark H Crawford ◽  
K. Bell ◽  
S. Kodur ◽  
YP Dang
Keyword(s):  
Crop Productivity ◽  
Semi Arid

scholarly journals Analysis of Arable Farmers Agroforestry Practices in Bokkos Local Government Area, Plateau State, Nigeria

2021 ◽  
Vol 8 (2) ◽  
pp. 161-170
Author(s):  
Onuwa G.C ◽  
Adepoju A.O ◽  
Mailumo S.S
Keyword(s):  
Crop Production ◽  
Negative Impact ◽  
Soil Improvement ◽  
Sustainable Land Use ◽  
Farm Income ◽  
Extension Services ◽  
Adoption Decision ◽  
Home Gardening ◽  
Agroforestry Adoption ◽  
Agroforestry Practices

The need to increase arable crop production to keep pace with food demands for a growing population without degrading ecosystems can only be achieved through adoption of agroforestry. Agroforestry practices help to achieve food security, biodiversity, conservation and land sustainability. The 94 famers were chosen using a multistage sampling process. Descriptive and inferential statistics were used to analyze the data. Most (74%) of respondents practiced home gardening. The significant benefits derived from agroforestry were; food/fruits (97%) and soil improvement/conservation (88%). The mean adoption index was 0.27. The log-likelihood obtained from Tobit was 67.92 indicating that the independent variables significantly explained the variation in the farmer’s adoption decision. Educational level (β=0.426) and farm experience (β=0.597) were both positive and statistically significant at ρ˂0.05; farm income (β=0.568) was significant at ρ˂0.01, and extension contact (β=-0.887, ρ˂0.01) was negative and had a negative impact on agroforestry adoption. The constraints affecting the practice of agroforestry among arable farmers were; poor policies, inadequate extension services, insufficient improved tree species among others. The study recommends intensification of extension services and provision of incentives to farmers to promote agroforestry adoption to achieve increased food production and sustainable land-use systems.

Evaluation of antioxidant enzymes activity in canola under salt stress

2014 ◽  
Vol 2 (2) ◽  
pp. 88-92 ◽  
Author(s):  
Jafar Abili ◽  
Sajjad Zare
Keyword(s):  
Superoxide Dismutase ◽  
Antioxidant Enzymes ◽  
Salt Stress ◽  
Arid Regions ◽  
Crop Productivity ◽  
Guaiacol Peroxidase ◽  
Randomized Design ◽  
Salinity Levels ◽  
Completely Randomized Design ◽  
Semi Arid

Salinity is one of the major stresses in arid and semi-arid regions causing adverse effects at physiological, biochemical, and molecular levels, limiting crop productivity. In this research, three canola cultivars (Licord, Talayeh, Zarfam) were compared at 5 salinity levels (control, 50, 100, 150 and 200 mM) for their catalase, guaiacol peroxidase, superoxide dismutase activity,proline and yield in a completely randomized design with 3 replications. In our study, we found that NaCl concentrations greater than 150 and 200 mM caused the irreversible disorders. Increased salt concentrations led to significant changes in the levels of antioxidative enzymes and proline in three canola cultivars. Also, yield rates in three varieties decreased in the presence of NaCl concentrations.

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