scholarly journals Development of soil test crop response based fertilizer prescriptions through integrated plant nutrition system for aggregatum onion (Allium cepa L.) under drip fertigation

2021 ◽  
Vol 13 (3) ◽  
pp. 1094-1101
Author(s):  
M. Parvathi Sugumari ◽  
S. Maragatham ◽  
R. Santhi ◽  
R. Swarna Priya

An insight into the balanced crop nutrition and efficient irrigation will be rewarding to attain profitable bulb yield of shallow-rooted and high nutrient requiring aggregatum onion. To develop fertilizer prescription equations(FPEs) for aggregatum onion under drip fertigation by encompassing the Soil Test Crop Response approach (STCR), a field experiment was conducted in Palaviduthi soil series with 15 treatments viz., Absolute control (T1), Blanket recommendation (60:60:30) + Farm Yard Manure (FYM) @ 12.5 t ha-1(T2), STCR based NPK fertilizer recommendation (STCR-NPK) for the targeted yield of 14 (T3),15 (T4),16 t ha-1 (T5), FYM @ 6.25 (T6), 12.5 t ha-1 (T7), STCR–NPK+FYM @ 12.5 t ha-1 for the targeted yield of 14 (T8),15 (T9),16 t ha-1 (T10), Biocompost @ 2.5 (T11), 5 t ha-1 (T12) and STCR–NPK+Biocompost @ 5 t ha-1 for the targeted yield of 14 (T13),15 (T14),16 t ha-1 (T15). The results revealed that T10 was more supercilious than others. The basic parameters were deliberated from the experimental data on total nutrient uptake, initial soil fertility status, applied fertilizer doses. The aggregatum onion (variety CO 4) required 0.43, 0.32, 0.45 Kg of N, P2O5, K2O to produce one quintal of bulb yield. The percent contribution of nutrients from soil and fertilizer was 14.01, 54.57 for N, 35.11,50.50 for P2O5 and 12.69, 70.12 for K2O, respectively. The contribution of N, P2O5, K2O from FYM and biocompost were 41.02, 16.23, 41.53 and 47.98, 15.87, 49.56 percent sequentially. Based on the above parameters, the fertilizer prescription equations were formulated for aggregatum onion under drip fertigation in Palaviduthi soil series.

2015 ◽  
Vol 49 (5) ◽  
Author(s):  
Sabina Ahmed ◽  
A. Basumatary ◽  
K. N. Das ◽  
B. K. Medhi

Soil Test Crop Response (STCR) study was conducted during 2010-11 for autumn rice under integrated plant nutrition system (IPNS) in Inceptisols (Aeric Endoaquepts) in Jorhat district of Assam. The basic parameters were computed from the STCR data, and the fertilizer prescription equations were developed for recommending fertilizer doses in autumn rice. The nutrient requirement (NR) for producing one quintal of autumn rice was found to be 2.40 kg, 0.84 kg and 2.25 kg of N, P<sub>2</sub>O<sub>5</sub> and K<sub>2</sub>O, respectively. The percent contribution of nutrients from soil (CS), fertilizer (CF) and FYM (CO) were calculated as 12.49, 45.31 and 32.92 for N, 13.42, 28.52 and 11.84 for P<sub>2</sub>O<sub>5</sub> and 21.99, 47.58 and 29.76 for K<sub>2</sub>O, respectively. These equations were validated in farmers’ fields during 2012 and the variation between actual yield and targeted yield ranged from +1.36 to +5.33.The fertilizer estimates under STCR-IPNS for 3000 and 4000 kg ha<sup>−1</sup> targeted yield recorded maximum response ratio and economic benefit in the field trial and confirmed the validity of proposed fertilizer prescription equations for autumn rice.


Author(s):  
U Bagavathi Ammal ◽  
K Coumaravel ◽  
R Sankar ◽  
Pradip Dey

To develop fertilizer prescription equations based on soil test crop response (STCR) approach for rice-rice cropping sequence, trials were conducted at farmer’s field in Karikalampakkam village, U.T. of Puducherry, during 2015-16. Soil test data, yield and nutrient uptake by successive crops were recorded to calculate four basic parameters viz. nutrient required to produce one quintal of rice, contribution of nutrients from fertilizers, contribution of nutrients from soil and contribution of nutrients from FYM used in developing STCR based fertilizer prescription equations. The per cent nutrient contribution of nutrients from soil (CS), fertilizer ( CF) and FYM (CFYM) were found to be 19.15, 45.90 and 23.27 for N, 12.13,40.16 and 26.98 for P2O5 and 13.76, 79.64 and 41.07 for K2O respectively for rice cv. White ponni. The same for the rice cv.ADT 45 were 13.48, 40.46 and 34.26 for N, 15.81, 44.64 and 19.89 for P2O5 and 10.48, 58.64 and 41.51 for K2O respectively. Based on fertilizer prescription equations and nomograms formulated for a range of soil test values and desired yield target for the cropping sequence. It was revealed that under the treatment NPK + FYM @ 12.5 t ha- 1 , 47, 29 and 34 kg ha- 1 for rice cv.White ponni and 41 , 22 and 27 kg ha- 1 for rice cv.ADT 45 of fertilizer N , P2O5 and K2O, respectively could be saved for attaining target yield of 70 q ha- 1 compared to NPK fertilizers alone.


2017 ◽  
Vol 9 (2) ◽  
pp. 799-804
Author(s):  
N. B. Ghube ◽  
A. D. Kadlag ◽  
B. M. Kamble

Studies on Soil Test Crop Response based Integrated Plant Nutrition System (STCR - IPNS) were conducted adopting the Inductive cum Targeted yield model onInceptisols (VerticHaplustepts) in Rahuri, District Ahemadnagar, Maharashtra, India in order to develop fertilizer prescriptions through IPNS for the desired yield targets of preseasonal sugarcane ratoon. The field experiments were carried out with maize as gradient crop for plant cane and after harvest of plant cane, pre-seasonal sugarcane ratoon as test crop. Using the data on yield, initial soil test values on available nitrogen (N), phosphorus (P), potassium (K), doses of fertilizers and farmyard manure (FYM) applied and NPK uptake, the basic parameters viz., nutrient requirement, contribution from soil, fertilizers and FYM were computed. It was found that 1.56 kg N, 0.58 kg P and 1.04 kg K were required for producing one tonnemillable cane of preseasonal ratoon sugarcane. The per cent contributions of N, P and K from soil and FYM for preseasonal sugarcane ratoon were 37.65, 85.88 and 19.82 per cent and 11.83, 10.88 and 12.24 per cent, respectively. Making use of these basic parameters, fertilizer prescription equations were developed for pre-seasonal sugarcane ratoon (var. C0-94012) and an estimate of fertilizer doses formulated for a range of soil test values and desired yield targets under NPK alone and IPNS (NPK plus FYM).


1999 ◽  
Vol 39 (3) ◽  
pp. 351 ◽  
Author(s):  
W. J. Robertson ◽  
I. R. McPharlin

The phosphorus (P) requirement of irrigated onions (Allium cepa L. cv. Creamgold) was measured over 2 consecutive spring plantings using superphosphate that was freshly-applied and applied 9 months before planting, at 0–800 kg P/ha on a newly cleared Karrakatta sand of low natural P fertility. The response of onions to placement of phosphate fertiliser (banded or broadcast) was also investigated. There was a significant (P<0.001) bulb yield response to level of applied P in all experiments. There was no significant effect of placement on yield although the concentrations of P in the youngest mature leaves and bulbs were on average 18% higher (i.e. 0.40 v. 0.34%) than in the broadcast treatment. A rectangular hyperbola described the relationship of P uptake by shoots or bulbs to level of applied P. Recovery efficiency (RE) of fertiliser P (P uptake by bulbs at rate i of applied P – uptake in absence of applied P/rate i of applied P) by bulbs after curing decreased from 0.43 at 50 kg P/ha to 0.06 at 600 kg P/ha. Recovery efficiency by bulbs at applied P required for 95 and 99% of maximum yield was 0.20 and 0.14 respectively. The level of freshly-applied P required for 95 and 99% of maximum relative yield over the 2 years (maximum yield, 80–100 t/ha) was 122 and 203 kg P/ha (Mitscherlich relationship, R2 = 0.82), respectively, at <10 g/g Colwell P soil test (newly cleared sites). The marketable (total – reject) yield was 94% and 92% of total yield at 122 and 203 kg P/ha respectively. Bicarbonate-soluble P extracted from the top 15 cm of soil was determined on residual P sites over 2 years where P was applied at 0–800 kg/ha. These soil test levels were related to bulb yield in a Mitscherlich relationship (R2 = 0.90). The critical soil test P values required for 95 and 99% of maximum relative yield, over the 2 years, were 50 and 80 g/g respectively. Phosphorus in the youngest mature leaves required for 95 and 99% of maximum yield ranged from 0.22–0.28 to 0.26–0.32%, respectively, from the Mitscherlich regressions, depending on plant stage (i.e. leaf number or days after sowing) although there was no consistent trend with age. Soil testing can be used to reduce current applications of fertiliser P without reducing yield. Plant testing can be used to monitor the P status and associated fertiliser needs of onions on sands. Both these testing procedures need to be verified in commercial crops with a wide variation in soil test P levels and management practices. Soil and plant testing could therefore be used to reduce fertiliser application and cost, improve fertiliser RE by onions and reduce fertiliser P losses to water systems on the Swan Coastal Plain. Changing placement from broadcasting to banding does not appear to improve the efficiency of phosphate fertiliser use by irrigated onions on Karrakatta sands.


2021 ◽  
Vol 13 (3) ◽  
pp. 1065-1071
Author(s):  
A. Agila ◽  
R. Santhi ◽  
S. Maragatham ◽  
R. Swarna Priya

Soil test crop response (STCR) correlation studies under Integrated Plant Nutrition System were conducted in the western agro-climatic zone of Tamil Nadu during 2020-2021 to devise the fertilizer prescription equations for tomato (Solanum lycopersicum L.)  under drip fertigation on an alfisol. The equations were derived by following Ramamoorthy’s Inductive cum targeted yield model. The nutrient requirement of N, P2O5 and K2O for producing one quintal of tomato fruit was found to be 0.22, 0.11, 0.27 kg respectively. The per cent contribution of nutrients were 37.93, 46.73 and 29.53 of N, P2O5 and K2O from soil (Cs) and 47.84, 31.12 and 74.13 of N, P2O5 and K2O from fertilizers (Cf) respectively. Two organic sources were applied viz., FYM (Farm Yard Manure) and Biocompost and the per cent contribution of nutrients from FYM were 38.36, 13.22 and 52.17 of N, P2O5 and K2O and from biocompost were 43.34, 10.90 and 57.00 of N, P2O5 and K2O respectively. Fertilizer adjustment equations were formulated for STCR-NPK alone, STCR-IPNS (FYM) and STCR-IPNS (Biocompost) by applying the basic parameters such as NR, Cs, Cf, Cfym, Cbiocompost. A ready reckoner of fertilizer doses for a set of soil test values at yield targets 80 and 90 t ha-1 was computed. The findings also showed that the adoption of STCR-IPNS could save more fertilizers.


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