scholarly journals Model Validation of Aqua Crop for Brinjal (Solanum melongena) Crop at Madakasira Region, Anantapur District, Andhra Pradesh

2021 ◽  
pp. 30-41
Author(s):  
P. Sivamma ◽  
N. Naga Hari Sairam ◽  
G. Raghavendra ◽  
M. Muralee Krishna ◽  
S. V. Swapna Priya ◽  
...  
Keyword(s):  
Crop Yield ◽  
Drip Irrigation ◽  
Andhra Pradesh ◽  
Simulation Models ◽  
Water Requirement ◽  
Crop Water Requirement ◽  
Crop Water ◽  
Flood Irrigation ◽  
Crop Simulation ◽  
Crop Simulation Models

Crop simulation models plays a vital role for estimating the effects of soil, water, nutrients on grain and biomass yields and water productivity of different crops. Among the various crop simulation models, Aqua Crop model was adopted for the predicting the crop water requirement in the Madakasira region, Anantapur district, Andhra Pradesh. The Brinjal crop was selected for the study and was irrigated through two different methods i.e., drip and flood irrigation. The model generated the crop yield and crop water requirement for the drip and flood irrigation of Brinjal crop was compared with the actual field results of crop yield and crop water requirement. The simulated crop yield and crop water requirement for the Brinjal crop under flood irrigation was 5.23 t/ha and 326 mm. The actual crop yield and crop water requirement for the Brinjal crop under flood irrigation was 4.2 t/ha and 335 mm. The simulated crop yield and crop water requirement for the Brinjal crop under Drip irrigation was 5.76 t/ha and 318.3 mm.  The actual crop yield and crop water requirement for the Brinjal crop under drip irrigation was 4.8 t/ha and 290 mm.  From the results, it was clear that the model simulated the actual conditions of the crop. The benefit cost ratio was done for the experimental field data which clearly shows that the crop yield under drip irrigation has achieved the higher cost benefit ratio. Therefore, Aqua Crop model was suitable for simulating the crop conditions under any circumstances.

scholarly journals Pan evaporation and sensor based approaches of irrigation scheduling for crop water requirement, growth and yield of okra

2021 ◽  
Vol 23 (4) ◽  
pp. 389-395
Author(s):  
VIKAS SHARMA ◽  
P.K. SINGH ◽  
S.R. BHAKAR ◽  
K.K. YADAV ◽  
S.S. LAKHAWAT ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Crop Yield ◽  
Drip Irrigation ◽  
Irrigation Scheduling ◽  
Water Requirement ◽  
Crop Water Requirement ◽  
Pan Evaporation ◽  
Crop Water ◽  
Use Efficiency

The results of this study revealed that the pan evaporation and sensor based irrigation scheduling along with fertigation scheduling significantly affected the plant height, fruit weight, fruit length, crop water requirement, crop yield and water use efficiency of okra crop. The pan evaporation and crop evapotranspiration (ETc) values significantly vary over different stages of okra crop. The maximum and minimum average daily pan evaporation was recorded 8.4 mm day-1 and 4.5 mm day-1 at mid stage and late stage of okra crop respectively while, the maximum average daily ETc was recorded 7 mm day-1 at mid stage of okra crop. A approach of irrigation scheduling with 100 per cent field capacity, based on soil moisture sensor under automated drip irrigation system along with 100 per cent RDF through fertigation in equal splits at 4 day intervalor 80 % per cent of volume of crop water requirement based on pan evaporation under automated drip irrigation along with 100 per cent RDF through fertigation in equal splits at 2 day interval, can be used for irrigating okra crop with significant water saving, crop yield and water use efficiency under limited availability of daily weather datain climatic condition of Udaipur district of Rajasthan.

Crop yield outlooks in the Iberian Peninsula: Connecting seasonal climate forecasts with crop simulation models

2016 ◽  
Vol 149 ◽  
pp. 75-87 ◽  
Author(s):  
Mirian Capa-Morocho ◽  
Amor V.M. Ines ◽  
Walter E. Baethgen ◽  
Belén Rodríguez-Fonseca ◽  
Eunjin Han ◽  
...  
Keyword(s):  
Iberian Peninsula ◽  
Crop Yield ◽  
Simulation Models ◽  
Seasonal Climate ◽  
Crop Simulation ◽  
Crop Simulation Models ◽  
Climate Forecasts ◽  
Seasonal Climate Forecasts

scholarly journals Performance Evaluation of Drip Irrigation Systems on Production of Okra (Hibiscus esculentus) in Southwestern, Nigeria

2019 ◽  
pp. 1-10
Author(s):  
M. O. Amoo ◽  
T. A. Ademiju ◽  
A. J. Adesigbin ◽  
G. A. Ali
Keyword(s):  
Seed Germination ◽  
Drip Irrigation ◽  
Water Requirement ◽  
Crop Water Requirement ◽  
Experimental Plot ◽  
Crop Water ◽  
Irrigation Systems ◽  
Southwestern Nigeria ◽  
Significant Difference ◽  
Hibiscus Esculentus

This study was carried out to evaluate the performance of drip irrigation systems on the production of okra (Hibiscus esculentus) in southwestern, Nigeria. Application of water to crops in an area of scarcity of water is very important to meet the food demand of the ever-increasing population and modified irrigation techniques that can assist the okra farmers to have affordable irrigation systems that will get them great yields at the end of the season was evaluated in this paper. A field experiment was conducted at the Teaching and Research farm of Agricultural and Bio-Environmental Engineering Department, School of Engineering Technology, The Federal Polytechnic, Ado, Ekiti - State, Nigeria. The field area of 150 mby 400 m was properly cleared, stumped, ploughed and harrowed. The topography of the land was flat with its suitable soil structure, texture, retention capacity and loamy clay soil. The cultivated area of land was divided into three and on each experimental plot, high yield and disease resistant okra variety seeds obtained from a research institute (IITA) were carefully selected and planted at a regular interval of 0.6 m. Drip laterals were laid in between rows of okra plants with inline drippers at a spacing of 20 cm. The parameters measured include okra seed germination, plant height, stem girth, number of leaves and yield production. The study also includes soil properties, crop water requirement and crop water use efficiency. There were no significant difference in the okra agronomic parameters at each experimental plots under drip irrigation system. The water applied to crop was greater than the actual crop water requirement and the efficiency of the drip irrigation was 68.5%.  There is high in seed germination percentage in with 3.5%, 3.6% and 3.8% at each experimental plot respectively. The selected okra agronomic parameters showed that okra performed very well under drip irrigation systems. Based on the results, water application through drip irrigation has a positive impact on growth and vegetative development of okra.

scholarly journals ↵​Effect of Drip Irrigation Combined Organic Mulching on Water Productivity and Yield of Tomato (Lycopersicon esculentum L.)

2021 ◽  
Author(s):  
K. Ashok Kumar ◽  
M. Navaneetha ◽  
B. Aravind ◽  
T.M. Rajesh ◽  
M. Pravallika ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Drip Irrigation ◽  
Growth Period ◽  
Crop Growth ◽  
Water Requirement ◽  
Crop Water Requirement ◽  
Crop Water ◽  
Daily Water ◽  
Use Efficiency

Background: The main challenge confronting both rainfed and irrigated agriculture is to improve water use efficiency (WUE) and sustainable water use for agriculture. A field experiment was conducted during early summer season of 2020 to study the effect of drip irrigation combined with organic mulching on soil moisture, growth, yield of tomato grown on alfisols at the college farm of College of Agricultural Engineering, Madakasira, Ananthapuramu district of Andhra Pradesh. Methods: The experiment was laid out in completely randomized block design (CRBD) with seven treatments comprising of various organic mulches. The treatments were T1 - Sawdust + Irrigation based on daily crop water requirement, T2 - Ragi straw + Irrigation based on daily crop water requirement, T3 - Groundnut shells + Irrigation based on daily crop water requirement, T4 - Groundnut shells + Irrigation once in every two days, T5 - Saw dust + Irrigation once in every two days, T6 - Ragi straw + Irrigation once in every two days and T7 - Control (without mulch) + Irrigation based on daily crop water requirement. All the treatments were replicated thrice. The plot size of each treatment was 4m × 2.5m. Result: The results revealed that throughout the crop growth period, T3 - Groundnut shells + Irrigation based on daily water requirement maintained soil higher moisture content to an extent of 132-146% as compared to control T7 (Control + Daily water requirement). The fruit yield obtained with T3 - Groundnut shells + Irrigation based on daily water requirement was significantly higher (8.8 t/ha) as compared to control T7 (Control + Daily water requirement) (7.6 t/ha). The highest water use efficiency (39.6 kg/ha/mm) was noted with T4 - Groundnut shells + Irrigation once in every two days), whereas T7 (Control + Daily water requirement) registered minimum WUE (16.3 kg/ha/mm). Weed dry matter and weed index was found to be higher (50% to 100%) in T7 (Control + Daily water requirement) throughout the crop growth period as compared to all the treatments applied with organic mulches. Our results indicated that T3 - (Groundnut shells + Irrigation based on daily crop water requirement) resulted in the highest plant height, number of fruits per plant and high water use efficiency as compared to without mulching. Further, under irrigation water constraints, groundnut shells mulch and drip irrigation once in two days was found to be effective in attaining higher WUE.

scholarly journals Estimation of Crop Water Requirement and Yield Observation of Safflower Cultivated under Drip and Flood Irrigation

2019 ◽  
Vol 8 (05) ◽  
pp. 1776-1790
Author(s):  
A. Rama Rao ◽  
Ch. Megha ◽  
V. Naga Pravallika ◽  
S. Megha Sai ◽  
T. Anjan Kumar ◽  
...  
Keyword(s):  
Water Requirement ◽  
Crop Water Requirement ◽  
Crop Water ◽  
Flood Irrigation
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